Abstract In the present study, composite materials required for elevated temperature applications were fabricated using vacuum bagging technique. Epoxy Resin (ER-VP401) was used as the matrix and Glass fibre was used as reinforcement. SiC, Al2O3 and others were used as fillers to bring in elevated temperature resistance. These composites were subjected to mechanical tests like Tensile, Hardness and Impact test. Tribological tests like two body abrasion and Pin on disc (POD) were carried out. Tensile strength, hardness and impact energy were improved with increase in fillers content. Wear resistance also improved with increase in percentage of fillers substantially. SEM micrographs are used to explain the mechanism of the material strengthening at elevated temperatures. Keywords: Epoxy resin, Glass Fiber (GF), Al2O3, SiC, Elevated Temperature Resistance.
EXPERIMENTAL STUDY ON WEAR BEHAVIOUR OF SIC FILLED HYBRID COMPOSITES USING TA...IAEME Publication
The document presents an experimental study on the wear behavior of silicon carbide (SiC) filled hybrid composites using the Taguchi method. Three types of hybrid composites with 10% SiC by weight were tested - glass fiber reinforced with epoxy and jute, sisal, or rubber. Pin-on-disk testing was conducted according to a Taguchi L9 orthogonal array, with speed, load, material, and distance as factors. Material was found to be the most influential factor on wear rate, followed by load. The 10% SiC glass fiber-rubber-epoxy composite showed the lowest wear rate at 300 rpm speed, 40N load, and 75m distance. SEM images showed wear of
Effect of Temperature on Wear Rate of Si-Epoxy- Eglass Polymer composite Mate...IDES Editor
With the increase use of polymer composites in
erosive work environment, it has become extremely important
to investigate their erosion characteristics. The hybrid
composite consisting of a Epoxy resin reinforced with Eglass
fiber and Si particles was developed. The effect of temperature
on wear rate applied to Si – Epoxy – Eglass polymer composite
has been studied. It has been found that the wear rate increases
as the temperature of carrier media (air) is increased.
Temperature of carrier media is one of the significant factor
influencing the erosion wear. The results were compared with
the plain epoxy composite material. Micrographs of eroded
surface are also presented to study the wear rate and Wear
behavior of composite.
Study and Analysis on Mechanical and Wear Behavior of SiC Filled Epoxy Compositepaperpublications3
Abstract: Silicon carbide possesses ample reinforcing potential to be used as a filler material in polymer matrix composites. Successful fabrication of epoxy matrix composites reinforced with silicon carbide particles is possible by simple hand-lay-up technique. These composites possess very low amount of porosity and improved micro-hardness, also it provide slightly superior tensile, flexural and inter-laminar shear strengths than those of the neat epoxy. This study reveals that silicon carbide possesses good filler characteristics as it improves the sliding wear resistance of the polymeric resin. Dry sliding wear characteristics of these composites have been gainfully analysed using a design-of-experiment approach based on Taguchi method. The analysis of experimental results shows that factors like filler content, sliding velocity and normal load, in this sequence, are identified as the significant factors affecting the specific wear rate of the composites under investigation. The silicon carbide-epoxy composites fabricated and experimented upon in this investigation are found to have adequate potential for a wide variety of applications particularly in wear prone environment. When wear is not the predominant degrading factor, epoxy without silicon carbide can be recommended. However, the weight fraction of filler in the composite is to be decided from the view point of required strength. If the place of use is hostile with sliding wear situations, then silicon carbide epoxy composites are to be preferred due to their fairly good wear resistance. Use of these composites may be suggested in applications like engineering structures in dusty environment and low cost building materials in desert.
Investigation of Wear Behavior of Rice Husk Filled Cotton Fiber Reinforced Po...ijtsrd
Usage of natural fiber reinforced polymeric composites has drastically increased in recent years for industrial applications. In this investigation, Composite specimens were prepared with polyester resin, cotton polyester resin, and cotton polyester resin with rice husk filler. The hand layup method was used to prepare composite sheets with specially prepared steel die. The specimens were prepared as per ASTMG99 standards and Friction coefficient and wear rate were measured for the proposed materials under dry sliding contact with steel counter face. Pin on disc wear testing machine used to perform the proposed tribological measurement and 20,40, and 60N applied normal loads. Suganth. V | Gabriel. A | Dr. S. Velumani "Investigation of Wear Behavior of Rice Husk Filled Cotton Fiber Reinforced Polyester Composites" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33635.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/33635/investigation-of-wear-behavior-of-rice-husk-filled-cotton-fiber-reinforced-polyester-composites/suganth-v
This document discusses the performance of concrete incorporating industrial and agricultural wastes. It describes adding sisal, flax, glass fiber, and carpet waste fibers at percentages of 0.5%, 1%, and 2% by volume to concrete mixes. Tests were performed on 234 concrete cubes to measure compressive strength, 39 beams for flexural strength, and 39 cylinders for indirect tensile strength. The results showed improvements in the mechanical and durability properties of concrete with the addition of glass fibers and waste fibers.
A Study on Effect of Carbon and Ash Fillers on Flexural Properties in GFRP Co...IRJET Journal
The document studies the effect of carbon and ash fillers on the flexural properties of glass fiber reinforced epoxy composites. Composites were fabricated with hand layup using glass fibers, epoxy resin, and either carbon or ash fillers added at 10% by volume. Flexural testing found that composites with carbon filler had slightly higher flexural strength than composites with ash filler, but both fillers improved flexural strength over composites without filler. In conclusion, carbon and ash fillers can significantly increase the flexural strength of glass fiber epoxy composites when added at 10% by volume.
Influence of Carbon & Glass Fiber Reinforcements on Flexural Strength of Epox...IJERA Editor
Hybrid composite materials are more attracted by the engineers because of their properties like stiffness and high specific strength which leads to the potential application in the area of aerospace, marine and automobile sectors. In the present investigation, the flexural strength and flexural modulus of carbon and glass fibers reinforced epoxy hybrid composites were studied. The vacuum bagging technique was adopted for the fabrication of polymer hybrid composite materials. The hardness, flexural strength and flexural modulus of the hybrid composites were determined as per ASTM standards. The hardness, flexural strength and flexural modulus were improved as the fiber reinforcement contents increased in the epoxy matrix material.
Experimental Evaluation of effect of filler on tensile behaviour of E-glass/e...IJRES Journal
The present work describes the processing and tensile characterization of polymer matrix composites (PMC). Two types of E-glass laminates namely woven and chopped are used as a reinforcing materials and epoxy resin constitutes matrix system. Several works has been carried out to prove that strength of glass fibre composites progressively increased with adding fillers. Keeping this in mind the present work successeded in using wollastonite as a filler material, tensile test samples from both woven and chopped type were prepared and tests are conducted as per ASTM standards and corresponding results are tabulated and discussed. The present work also highlights the tensile strength for both woven and chopped laminates were compared. It is observed that use of wollastonite filler influences greatly on tensile properties of polymer matrix composites. And it is also cleared that woven laminates shows higher resistance to tensile loading as compared to chopped laminates.
EXPERIMENTAL STUDY ON WEAR BEHAVIOUR OF SIC FILLED HYBRID COMPOSITES USING TA...IAEME Publication
The document presents an experimental study on the wear behavior of silicon carbide (SiC) filled hybrid composites using the Taguchi method. Three types of hybrid composites with 10% SiC by weight were tested - glass fiber reinforced with epoxy and jute, sisal, or rubber. Pin-on-disk testing was conducted according to a Taguchi L9 orthogonal array, with speed, load, material, and distance as factors. Material was found to be the most influential factor on wear rate, followed by load. The 10% SiC glass fiber-rubber-epoxy composite showed the lowest wear rate at 300 rpm speed, 40N load, and 75m distance. SEM images showed wear of
Effect of Temperature on Wear Rate of Si-Epoxy- Eglass Polymer composite Mate...IDES Editor
With the increase use of polymer composites in
erosive work environment, it has become extremely important
to investigate their erosion characteristics. The hybrid
composite consisting of a Epoxy resin reinforced with Eglass
fiber and Si particles was developed. The effect of temperature
on wear rate applied to Si – Epoxy – Eglass polymer composite
has been studied. It has been found that the wear rate increases
as the temperature of carrier media (air) is increased.
Temperature of carrier media is one of the significant factor
influencing the erosion wear. The results were compared with
the plain epoxy composite material. Micrographs of eroded
surface are also presented to study the wear rate and Wear
behavior of composite.
Study and Analysis on Mechanical and Wear Behavior of SiC Filled Epoxy Compositepaperpublications3
Abstract: Silicon carbide possesses ample reinforcing potential to be used as a filler material in polymer matrix composites. Successful fabrication of epoxy matrix composites reinforced with silicon carbide particles is possible by simple hand-lay-up technique. These composites possess very low amount of porosity and improved micro-hardness, also it provide slightly superior tensile, flexural and inter-laminar shear strengths than those of the neat epoxy. This study reveals that silicon carbide possesses good filler characteristics as it improves the sliding wear resistance of the polymeric resin. Dry sliding wear characteristics of these composites have been gainfully analysed using a design-of-experiment approach based on Taguchi method. The analysis of experimental results shows that factors like filler content, sliding velocity and normal load, in this sequence, are identified as the significant factors affecting the specific wear rate of the composites under investigation. The silicon carbide-epoxy composites fabricated and experimented upon in this investigation are found to have adequate potential for a wide variety of applications particularly in wear prone environment. When wear is not the predominant degrading factor, epoxy without silicon carbide can be recommended. However, the weight fraction of filler in the composite is to be decided from the view point of required strength. If the place of use is hostile with sliding wear situations, then silicon carbide epoxy composites are to be preferred due to their fairly good wear resistance. Use of these composites may be suggested in applications like engineering structures in dusty environment and low cost building materials in desert.
Investigation of Wear Behavior of Rice Husk Filled Cotton Fiber Reinforced Po...ijtsrd
Usage of natural fiber reinforced polymeric composites has drastically increased in recent years for industrial applications. In this investigation, Composite specimens were prepared with polyester resin, cotton polyester resin, and cotton polyester resin with rice husk filler. The hand layup method was used to prepare composite sheets with specially prepared steel die. The specimens were prepared as per ASTMG99 standards and Friction coefficient and wear rate were measured for the proposed materials under dry sliding contact with steel counter face. Pin on disc wear testing machine used to perform the proposed tribological measurement and 20,40, and 60N applied normal loads. Suganth. V | Gabriel. A | Dr. S. Velumani "Investigation of Wear Behavior of Rice Husk Filled Cotton Fiber Reinforced Polyester Composites" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33635.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/33635/investigation-of-wear-behavior-of-rice-husk-filled-cotton-fiber-reinforced-polyester-composites/suganth-v
This document discusses the performance of concrete incorporating industrial and agricultural wastes. It describes adding sisal, flax, glass fiber, and carpet waste fibers at percentages of 0.5%, 1%, and 2% by volume to concrete mixes. Tests were performed on 234 concrete cubes to measure compressive strength, 39 beams for flexural strength, and 39 cylinders for indirect tensile strength. The results showed improvements in the mechanical and durability properties of concrete with the addition of glass fibers and waste fibers.
A Study on Effect of Carbon and Ash Fillers on Flexural Properties in GFRP Co...IRJET Journal
The document studies the effect of carbon and ash fillers on the flexural properties of glass fiber reinforced epoxy composites. Composites were fabricated with hand layup using glass fibers, epoxy resin, and either carbon or ash fillers added at 10% by volume. Flexural testing found that composites with carbon filler had slightly higher flexural strength than composites with ash filler, but both fillers improved flexural strength over composites without filler. In conclusion, carbon and ash fillers can significantly increase the flexural strength of glass fiber epoxy composites when added at 10% by volume.
Influence of Carbon & Glass Fiber Reinforcements on Flexural Strength of Epox...IJERA Editor
Hybrid composite materials are more attracted by the engineers because of their properties like stiffness and high specific strength which leads to the potential application in the area of aerospace, marine and automobile sectors. In the present investigation, the flexural strength and flexural modulus of carbon and glass fibers reinforced epoxy hybrid composites were studied. The vacuum bagging technique was adopted for the fabrication of polymer hybrid composite materials. The hardness, flexural strength and flexural modulus of the hybrid composites were determined as per ASTM standards. The hardness, flexural strength and flexural modulus were improved as the fiber reinforcement contents increased in the epoxy matrix material.
Experimental Evaluation of effect of filler on tensile behaviour of E-glass/e...IJRES Journal
The present work describes the processing and tensile characterization of polymer matrix composites (PMC). Two types of E-glass laminates namely woven and chopped are used as a reinforcing materials and epoxy resin constitutes matrix system. Several works has been carried out to prove that strength of glass fibre composites progressively increased with adding fillers. Keeping this in mind the present work successeded in using wollastonite as a filler material, tensile test samples from both woven and chopped type were prepared and tests are conducted as per ASTM standards and corresponding results are tabulated and discussed. The present work also highlights the tensile strength for both woven and chopped laminates were compared. It is observed that use of wollastonite filler influences greatly on tensile properties of polymer matrix composites. And it is also cleared that woven laminates shows higher resistance to tensile loading as compared to chopped laminates.
Preparation and mechanical characterization of epoxy based composite develope...eSAT Journals
This document summarizes research on developing epoxy-based composites using coconut shell powder as a biowaste material. Composites with 10%, 20%, and 30% coconut shell powder by weight were fabricated using hand layup. Mechanical testing showed that tensile strength and flexural strength increased up to 20% filler content compared to plain epoxy, while hardness increased with higher filler content. The composites exhibited improved properties over epoxy due to better interaction between the coconut shell powder and epoxy matrix. However, properties decreased at 30% filler likely due to agglomeration and poor adhesion. The composites showed potential for industrial applications after further optimization.
Mechanical properties of rice husk carbon black hybrid natural rubber compositeAlexander Decker
This document investigates the mechanical properties of natural rubber composites reinforced with hybrid fillers of rice husk and carbon black. Six composite samples were prepared with varying ratios of rice husk to carbon black at a constant filler loading of 50 parts per hundred rubber. Testing showed that with increasing carbon black content, the composites exhibited increased tensile strength, modulus, hardness and abrasion resistance, but decreased elongation at break. Flex fatigue resistance improved with higher carbon black content due to reduced stiffening of the polymer chains. Therefore, the rice husk/carbon black hybrid filler can provide reinforcement for natural rubber where specific end-use mechanical properties are required.
AXIAL CRUSHING OF GFRP FRUSTA: EXPERIMENTAL AND NUMERICAL ANALYSISIAEME Publication
Experimental and numerical analysis of the axial crushing of glass fiber
reinforced polymer (GFRP) frusta tubes are presented in this study. The frusta tubes
are fabricated from plain woven C-glass fabric bonded with the epoxy system LY-556
resin and HY951 hardener. Two semi-apical angles 5º and 10º with 95mm height and
1.4mm wall thickness were studied under quasi-static crush conditions. All specimens
showed progressive damage in region starts from the contact with the crushing
crosshead and spreads about 7mm ahead the crushing surface. Mix of tiny debris and
strip shaped chunks are generated in the crushing zone. The debris is accumulated as
outside or inside fronds formation. The strip shaped chunks are generated
peripherally due to shear effects by crusting from the frusta body and crack growth at
the outmost crush zone points from the crushing surface. The 5º frusta showed better
crashworthiness performance than 10º frusta. Simulation results showed good
agreement with the experimental findings in both collapse mode and energy
absorption
Study & Testing Of Bio-Composite Material Based On Munja FibreIJMER
The incorporation of natural fibres such as munja fiber composites has gained
increasing applications both in many areas of Engineering and Technology. The aim of this study is to
evaluate mechanical properties such as flexural and tensile properties of reinforced epoxy composites.
This is mainly due to their applicable benefits as they are light weight and offer low cost compared to
synthetic fibre composites. Munja fibres recently have been a substitute material in many weight-critical
applications in areas such as aerospace, automotive and other high demanding industrial sectors. In
this study, natural munja fibre composites and munja/fibreglass hybrid composites were fabricated by a
combination of hand lay-up and cold-press methods. A new variety in munja fibre is the present work
the main aim of the work is to extract the neat fibre and is characterized for its flexural characteristics.
The composites are fabricated by reinforcing untreated and treated fibre and are tested for their
mechanical, properties strictly as per ASTM procedures.
Dry Sliding Wear Behavior of Glass and Jute Fiber Hybrid Reinforced Epoxy Com...IJERD Editor
Glass Fiber reinforced composites are emerging as a potential material for a wide variety of
industrial applications owing to their good combination of physical and mechanical properties. In recent
decades, glass fiber composites parts are widely used as sliding components in different engineering
applications. Due to the legitimate theoretical and practical importance, the study of tribological performance of
these emerging materials becomes highly decisive. In the present research initiative, two type of reinforcements
are selected there are Glass and jute fibers with matrix of epoxy 551 was used for composite specimen
preparation. The frictional and wear characteristics of the developed composites have been studied under
different sliding conditions. From the results it is conclude that jute is more efficient in improving the
tribological Performance of glass-epoxy composites than the raw glass fiber reinforced epoxy composites.
Preparation and characterisation of alumina nanocomposites with aramid fibre ...eSAT Journals
This document summarizes research on preparing and characterizing alumina nanocomposites with aramid fibre and hybrid fibre reinforcements. Alumina nanoparticles were dispersed in epoxy resin to create nanocomposites. Aramid fibre, carbon fibre, and hybrid carbon-aramid fibre laminates were produced from these epoxy-alumina nanocomposites. Mechanical testing showed improved tensile strength and flexural strength with the addition of alumina nanoparticles and with hybrid or aramid fibre reinforcement compared to plain epoxy composites. Impact strength did not significantly differ between materials with and without nanoparticles. The research demonstrated enhanced mechanical properties from adding alumina nanoparticles and different fibre reinforcements to epoxy resin composites
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This document summarizes a study on the effect of pulverized groundnut husk powder on the mechanical properties of polypropylene composites. Polypropylene composites were prepared with groundnut husk powder filler contents of 2, 4, and 6% by weight and particle sizes of 0.2, 0.4, 0.6, 0.8, and 1.0μm. The tensile strength, modulus, flexural strength, and impact strength of the composites increased with increasing filler content and decreasing particle size, while strain-at-break decreased. The water sorption of the composites also increased with filler content. The results indicate that groundnut husk powder is an effective filler
Composites are engineered materials made from two or more constituents with different physical or chemical
properties, which remain separate and distinct within the finished structure. A fiber is a material, which is made into
a long filament with diameter generally in the order of 10 microns. The aspect ratio of length to diameter can be
ranging from thousands to infinity in continuous fibers. Increasing worldwide environmental awareness is
encouraging scientific research into the development of cheaper, more environmentally friendly and more
sustainable construction and packing materials. For environment concern on synthetic fiber (such as glass, carbon,
ceramic gibers etc) natural fibers (such as flax, hemp, jute, kenai) etc are widely used. Industrial hemp fiber is one
of the strongest of the natural fibers available and possesses benefits such as low cost and low production energy
requirements. The primary objective of this research is to fabricate the natural fiber composites with suitable
processing/manufacturing methods and to examine the mechanical properties when subjected to Tension, Bending
and to compare & contrast the results with the available literature. In this research work, hemp fiber reinforced
Epoxy matrix composites have been developed by hand layup method with varying process parameters, such as
coupling agent(with and without compatibilizers) and different fiber percentages (10%,20% and 30% by weight).
The developed composites were then characterized by tensile test and flexural testing. Results show that the tensile
strength and flexural properties increases with the increase in fiber percentage. However after a certain percentage
the tensile strength decreases again. Compared to untreated hemp fiber, no significant changes in the tensile strength
have been observed for treated hemp fiber reinforcement. The flexural strength / modulus of the composite were
higher compared to pure epoxy for all filler/fiber loadings.
Effect of microsilica in woven ceramic fibrephenolic resin compositeseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IRJET- Mechanical Characterization of Polymer Matrix Composites for Transport...IRJET Journal
This document discusses the fabrication and mechanical characterization of a polymer matrix composite tube for transportation safety applications. The tube was fabricated using a hand layup process with layers of Kevlar and glass fibers in an epoxy matrix. Compression testing of the tube showed that it withstood a maximum load of 58.4 kN and had a compressive strength of 82.13 MPa, indicating its potential use for energy absorption applications in automobiles. A literature review presented research on the mechanical properties of Kevlar and fiber-reinforced composites, highlighting their use in impact and ballistic resistance.
Enhancing Mechanical Properties of Jute Fibre/Glass Fiber and Epoxy Combined ...IRJET Journal
This document summarizes a study that enhanced the mechanical properties of jute fiber and glass fiber composites by mixing them with epoxy resin. Four different composite laminates were fabricated using jute and glass fibers in different layer arrangements. The composites were tested for tensile strength, impact strength, hardness, and their microstructure was analyzed using SEM and EDS. The JGGJ laminate composite showed the highest tensile strength at 76.22 MPa while the GJJG laminate had the highest impact strength. SEM images revealed better bonding between jute fibers and epoxy than glass fibers. Overall, incorporating epoxy resin improved the mechanical properties of jute and glass fiber composites and made them more
IRJET - A Review on Multi-Layered Armour using Sugarcane Bagasse WasteIRJET Journal
This document reviews the use of sugarcane bagasse waste as a material for multi-layered ballistic armor. It first discusses sugarcane bagasse composites, including their mechanical properties and prior research examining their reinforcement in polymer matrices. It then discusses multi-layered armor systems, noting that they provide weight advantages over monolithic plates but can have reduced ballistic resistance. The document surveys previous research comparing the performance of mono-layered and multi-layered armor configurations. Finally, it discusses the potential use of sugarcane bagasse composites as the secondary layer in a multi-layered armor system.
Study of mechanical and morphological properties of glass fiber reinforced mo...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Study on properties of sisal fiber reinforced concrete with different mix pro...eSAT Journals
Abstract
The present research was designed to check the workability and strength properties of sisal fiber reinforced concrete with different mix proportions and different percentage of fiber addition. The materials were chosen to improve the various strength properties of the structure to obtain sustainability and better quality structure. Short discrete vegetable fiber (sisal) was examined for its suitability for incorporation in cement concrete. The physical property of this fiber has shown no deterioration in a concrete medium. Fibers were brushed, lined up and cut to obtain 4cm length. Degree of workability of concrete mix with 0.2% super plasticizer and water cement ratio 0.45 had good workability with slump value 53mm and compaction factor 0.88, which is effective, was obtained. Materials were hand mixed with 0.5%, 1% and 1.5% addition of fiber in M20 and M25 mix design and casted in cubes and cylinders. The obtained specimens were subjected to tests aimed to check the compressive, tensile and flexural strength. An increase in compressive strength by 50.53% and tensile strength by 3.416% was observed for 1.5% addition of fiber in M20 mix design respectively. An increase in compressive strength by 52.51% and tensile strength by 3.904% was observed for 1.5% addition of fiber in M25 mix design respectively.
Keywords: Sisal fiber, workability, sustainability, mix design, compressive, tensile, flexural.
Investigations on tensile and flexural strength of wood dust and glass fibreIAEME Publication
The document describes an experimental investigation of the mechanical properties of hybrid composites made of epoxy reinforced with glass fibers and filled with pine wood dust particles. Four composite specimens with different volume fractions of pine wood dust (6.5%, 11.3%, 26.8%, 35.9%) and glass fibers (9.6%) were tested to determine their tensile and flexural strengths. The results showed that incorporating glass fibers into the pine wood dust-filled epoxy improved both the tensile and flexural strengths compared to neat epoxy. Tensile strength increased by 63.1-115% and flexural strength increased by 78.9-110.5% with the addition of glass fibers and varying
This document reviews research on drilling fiber reinforced polymers (FRPs), specifically focusing on glass, carbon, and natural fiber reinforced polymers. It discusses key quality aspects of drilling FRPs like thrust force, torque, delamination, and surface roughness. Various studies are summarized that examine how drilling parameters like speed, feed rate, drill geometry, and material properties influence these quality aspects. The document concludes that thrust force, torque, and delamination can be reduced by optimizing drilling parameters, and that parameters like feed rate and drill diameter significantly impact drilling performance.
Effect of short glass fiber and fillers on dry sliding wear behaviour of ther...IAEME Publication
The document summarizes research on the effect of short glass fiber and fillers on the dry sliding wear behavior of thermoplastic copolyester elastomer composites. Experiments were conducted using a Taguchi design of experiments with variables including filler content, sliding velocity, and sliding distance. Analysis of variance was used to determine the most influential parameters on specific wear rate. The experimental results showed that filler content had the greatest effect on specific wear rate, followed by sliding distance, while sliding velocity showed a negligible effect. Examination of worn surfaces revealed features associated with adhesion of the matrix to fibers as well as microcracking and debris formation.
1) The document investigates the effect of carbon fiber content on the mechanical properties of hybrid composite laminates made of woven carbon, glass fibers and epoxy resin.
2) Specimens with different carbon fiber percentages were tested for tensile strength, compression strength, impact strength, and flexural strength.
3) The results showed that increasing the carbon fiber content increased the mechanical properties of the composite laminate in all tests. The specimen with the highest carbon fiber content performed best mechanically.
MECHANICAL PROPERTIES OF SIC AL2O3FILLED GLASS EPOXY COMPOSITESIAEME Publication
In the present study, glass-epoxy based composites were fabricated by filling with nano size SiC and Al2O3 filler particles. The hand lay-up approach was used for fabrication of random oriented short E-glass fibre reinforced epoxy composites filled with SiC and Al2O3 powder particles. The volume percentage of filler materials in the composites were varied, SiC was varied from 0, 5 and 10%, whereas Al2O3 was kept constant at 5%. Mechanical characterization were studied effectively. The filled and unfilled SiC and Al2O3particles, were tested for micro-hardness, tensile strength, and flexural strength in according with ASTM standards. It was observed from the studies that using particles as fillers improved the mechanical properties of the E-glass fibre substantially.
Experimental Determination of Mechanical and Vibration Properties of Epoxy ba...IJMERJOURNAL
ABSTRACT: The organic polymer composites filled with inorganic fillers became an important area of research and development in recent years due to their applications in various fields. The aim of the present work was to fabricate and evaluate the mechanical performance of epoxy polymer composites filled with 30% weight percentage of carbon fiber and 2%, 4%, 6%, 8% of Silicon Carbide. The samples were prepared by hand layup technique as this method was easy to fabricate and having low tooling cost and results in the good surface finishand then composites weretested by using UTM and ATALON FFT analyzer. The DEWESOFT software was used to obtain the frequency response functions of the samples. The variations in properties with respect to change in weight of silicon carbide were obtained and represented by graphs. The composite with 30% of carbon fiber and 8% of Sic have shown improved performance in terms of flexural strength, tensile strength, tensile modulus and higher natural frequency indicating high stiffness value.
This document describes the design and analysis of a leaf spring made of sisal fiber reinforced glass epoxy composite. It begins with an abstract that outlines the goal of replacing steel leaf springs with composites to reduce weight and increase fuel economy. It then reviews relevant literature on composite leaf springs. The objectives and methodology are described, including fabrication of composite specimens using hand layup. Tests are performed to determine material properties and compare different fiber volume fractions. A steel leaf spring is modeled and analyzed in ANSYS to determine stresses and deflection. A composite leaf spring is also modeled and tested experimentally to verify analytical and FEA results. The composite leaf spring shows stresses within acceptable limits for the material.
Preparation and mechanical characterization of epoxy based composite develope...eSAT Journals
This document summarizes research on developing epoxy-based composites using coconut shell powder as a biowaste material. Composites with 10%, 20%, and 30% coconut shell powder by weight were fabricated using hand layup. Mechanical testing showed that tensile strength and flexural strength increased up to 20% filler content compared to plain epoxy, while hardness increased with higher filler content. The composites exhibited improved properties over epoxy due to better interaction between the coconut shell powder and epoxy matrix. However, properties decreased at 30% filler likely due to agglomeration and poor adhesion. The composites showed potential for industrial applications after further optimization.
Mechanical properties of rice husk carbon black hybrid natural rubber compositeAlexander Decker
This document investigates the mechanical properties of natural rubber composites reinforced with hybrid fillers of rice husk and carbon black. Six composite samples were prepared with varying ratios of rice husk to carbon black at a constant filler loading of 50 parts per hundred rubber. Testing showed that with increasing carbon black content, the composites exhibited increased tensile strength, modulus, hardness and abrasion resistance, but decreased elongation at break. Flex fatigue resistance improved with higher carbon black content due to reduced stiffening of the polymer chains. Therefore, the rice husk/carbon black hybrid filler can provide reinforcement for natural rubber where specific end-use mechanical properties are required.
AXIAL CRUSHING OF GFRP FRUSTA: EXPERIMENTAL AND NUMERICAL ANALYSISIAEME Publication
Experimental and numerical analysis of the axial crushing of glass fiber
reinforced polymer (GFRP) frusta tubes are presented in this study. The frusta tubes
are fabricated from plain woven C-glass fabric bonded with the epoxy system LY-556
resin and HY951 hardener. Two semi-apical angles 5º and 10º with 95mm height and
1.4mm wall thickness were studied under quasi-static crush conditions. All specimens
showed progressive damage in region starts from the contact with the crushing
crosshead and spreads about 7mm ahead the crushing surface. Mix of tiny debris and
strip shaped chunks are generated in the crushing zone. The debris is accumulated as
outside or inside fronds formation. The strip shaped chunks are generated
peripherally due to shear effects by crusting from the frusta body and crack growth at
the outmost crush zone points from the crushing surface. The 5º frusta showed better
crashworthiness performance than 10º frusta. Simulation results showed good
agreement with the experimental findings in both collapse mode and energy
absorption
Study & Testing Of Bio-Composite Material Based On Munja FibreIJMER
The incorporation of natural fibres such as munja fiber composites has gained
increasing applications both in many areas of Engineering and Technology. The aim of this study is to
evaluate mechanical properties such as flexural and tensile properties of reinforced epoxy composites.
This is mainly due to their applicable benefits as they are light weight and offer low cost compared to
synthetic fibre composites. Munja fibres recently have been a substitute material in many weight-critical
applications in areas such as aerospace, automotive and other high demanding industrial sectors. In
this study, natural munja fibre composites and munja/fibreglass hybrid composites were fabricated by a
combination of hand lay-up and cold-press methods. A new variety in munja fibre is the present work
the main aim of the work is to extract the neat fibre and is characterized for its flexural characteristics.
The composites are fabricated by reinforcing untreated and treated fibre and are tested for their
mechanical, properties strictly as per ASTM procedures.
Dry Sliding Wear Behavior of Glass and Jute Fiber Hybrid Reinforced Epoxy Com...IJERD Editor
Glass Fiber reinforced composites are emerging as a potential material for a wide variety of
industrial applications owing to their good combination of physical and mechanical properties. In recent
decades, glass fiber composites parts are widely used as sliding components in different engineering
applications. Due to the legitimate theoretical and practical importance, the study of tribological performance of
these emerging materials becomes highly decisive. In the present research initiative, two type of reinforcements
are selected there are Glass and jute fibers with matrix of epoxy 551 was used for composite specimen
preparation. The frictional and wear characteristics of the developed composites have been studied under
different sliding conditions. From the results it is conclude that jute is more efficient in improving the
tribological Performance of glass-epoxy composites than the raw glass fiber reinforced epoxy composites.
Preparation and characterisation of alumina nanocomposites with aramid fibre ...eSAT Journals
This document summarizes research on preparing and characterizing alumina nanocomposites with aramid fibre and hybrid fibre reinforcements. Alumina nanoparticles were dispersed in epoxy resin to create nanocomposites. Aramid fibre, carbon fibre, and hybrid carbon-aramid fibre laminates were produced from these epoxy-alumina nanocomposites. Mechanical testing showed improved tensile strength and flexural strength with the addition of alumina nanoparticles and with hybrid or aramid fibre reinforcement compared to plain epoxy composites. Impact strength did not significantly differ between materials with and without nanoparticles. The research demonstrated enhanced mechanical properties from adding alumina nanoparticles and different fibre reinforcements to epoxy resin composites
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This document summarizes a study on the effect of pulverized groundnut husk powder on the mechanical properties of polypropylene composites. Polypropylene composites were prepared with groundnut husk powder filler contents of 2, 4, and 6% by weight and particle sizes of 0.2, 0.4, 0.6, 0.8, and 1.0μm. The tensile strength, modulus, flexural strength, and impact strength of the composites increased with increasing filler content and decreasing particle size, while strain-at-break decreased. The water sorption of the composites also increased with filler content. The results indicate that groundnut husk powder is an effective filler
Composites are engineered materials made from two or more constituents with different physical or chemical
properties, which remain separate and distinct within the finished structure. A fiber is a material, which is made into
a long filament with diameter generally in the order of 10 microns. The aspect ratio of length to diameter can be
ranging from thousands to infinity in continuous fibers. Increasing worldwide environmental awareness is
encouraging scientific research into the development of cheaper, more environmentally friendly and more
sustainable construction and packing materials. For environment concern on synthetic fiber (such as glass, carbon,
ceramic gibers etc) natural fibers (such as flax, hemp, jute, kenai) etc are widely used. Industrial hemp fiber is one
of the strongest of the natural fibers available and possesses benefits such as low cost and low production energy
requirements. The primary objective of this research is to fabricate the natural fiber composites with suitable
processing/manufacturing methods and to examine the mechanical properties when subjected to Tension, Bending
and to compare & contrast the results with the available literature. In this research work, hemp fiber reinforced
Epoxy matrix composites have been developed by hand layup method with varying process parameters, such as
coupling agent(with and without compatibilizers) and different fiber percentages (10%,20% and 30% by weight).
The developed composites were then characterized by tensile test and flexural testing. Results show that the tensile
strength and flexural properties increases with the increase in fiber percentage. However after a certain percentage
the tensile strength decreases again. Compared to untreated hemp fiber, no significant changes in the tensile strength
have been observed for treated hemp fiber reinforcement. The flexural strength / modulus of the composite were
higher compared to pure epoxy for all filler/fiber loadings.
Effect of microsilica in woven ceramic fibrephenolic resin compositeseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IRJET- Mechanical Characterization of Polymer Matrix Composites for Transport...IRJET Journal
This document discusses the fabrication and mechanical characterization of a polymer matrix composite tube for transportation safety applications. The tube was fabricated using a hand layup process with layers of Kevlar and glass fibers in an epoxy matrix. Compression testing of the tube showed that it withstood a maximum load of 58.4 kN and had a compressive strength of 82.13 MPa, indicating its potential use for energy absorption applications in automobiles. A literature review presented research on the mechanical properties of Kevlar and fiber-reinforced composites, highlighting their use in impact and ballistic resistance.
Enhancing Mechanical Properties of Jute Fibre/Glass Fiber and Epoxy Combined ...IRJET Journal
This document summarizes a study that enhanced the mechanical properties of jute fiber and glass fiber composites by mixing them with epoxy resin. Four different composite laminates were fabricated using jute and glass fibers in different layer arrangements. The composites were tested for tensile strength, impact strength, hardness, and their microstructure was analyzed using SEM and EDS. The JGGJ laminate composite showed the highest tensile strength at 76.22 MPa while the GJJG laminate had the highest impact strength. SEM images revealed better bonding between jute fibers and epoxy than glass fibers. Overall, incorporating epoxy resin improved the mechanical properties of jute and glass fiber composites and made them more
IRJET - A Review on Multi-Layered Armour using Sugarcane Bagasse WasteIRJET Journal
This document reviews the use of sugarcane bagasse waste as a material for multi-layered ballistic armor. It first discusses sugarcane bagasse composites, including their mechanical properties and prior research examining their reinforcement in polymer matrices. It then discusses multi-layered armor systems, noting that they provide weight advantages over monolithic plates but can have reduced ballistic resistance. The document surveys previous research comparing the performance of mono-layered and multi-layered armor configurations. Finally, it discusses the potential use of sugarcane bagasse composites as the secondary layer in a multi-layered armor system.
Study of mechanical and morphological properties of glass fiber reinforced mo...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Study on properties of sisal fiber reinforced concrete with different mix pro...eSAT Journals
Abstract
The present research was designed to check the workability and strength properties of sisal fiber reinforced concrete with different mix proportions and different percentage of fiber addition. The materials were chosen to improve the various strength properties of the structure to obtain sustainability and better quality structure. Short discrete vegetable fiber (sisal) was examined for its suitability for incorporation in cement concrete. The physical property of this fiber has shown no deterioration in a concrete medium. Fibers were brushed, lined up and cut to obtain 4cm length. Degree of workability of concrete mix with 0.2% super plasticizer and water cement ratio 0.45 had good workability with slump value 53mm and compaction factor 0.88, which is effective, was obtained. Materials were hand mixed with 0.5%, 1% and 1.5% addition of fiber in M20 and M25 mix design and casted in cubes and cylinders. The obtained specimens were subjected to tests aimed to check the compressive, tensile and flexural strength. An increase in compressive strength by 50.53% and tensile strength by 3.416% was observed for 1.5% addition of fiber in M20 mix design respectively. An increase in compressive strength by 52.51% and tensile strength by 3.904% was observed for 1.5% addition of fiber in M25 mix design respectively.
Keywords: Sisal fiber, workability, sustainability, mix design, compressive, tensile, flexural.
Investigations on tensile and flexural strength of wood dust and glass fibreIAEME Publication
The document describes an experimental investigation of the mechanical properties of hybrid composites made of epoxy reinforced with glass fibers and filled with pine wood dust particles. Four composite specimens with different volume fractions of pine wood dust (6.5%, 11.3%, 26.8%, 35.9%) and glass fibers (9.6%) were tested to determine their tensile and flexural strengths. The results showed that incorporating glass fibers into the pine wood dust-filled epoxy improved both the tensile and flexural strengths compared to neat epoxy. Tensile strength increased by 63.1-115% and flexural strength increased by 78.9-110.5% with the addition of glass fibers and varying
This document reviews research on drilling fiber reinforced polymers (FRPs), specifically focusing on glass, carbon, and natural fiber reinforced polymers. It discusses key quality aspects of drilling FRPs like thrust force, torque, delamination, and surface roughness. Various studies are summarized that examine how drilling parameters like speed, feed rate, drill geometry, and material properties influence these quality aspects. The document concludes that thrust force, torque, and delamination can be reduced by optimizing drilling parameters, and that parameters like feed rate and drill diameter significantly impact drilling performance.
Similar to Study of the effects of carbon and glass fibre reinforcement and other fillers on elevated temperature resistant properties of er matrix composites
Effect of short glass fiber and fillers on dry sliding wear behaviour of ther...IAEME Publication
The document summarizes research on the effect of short glass fiber and fillers on the dry sliding wear behavior of thermoplastic copolyester elastomer composites. Experiments were conducted using a Taguchi design of experiments with variables including filler content, sliding velocity, and sliding distance. Analysis of variance was used to determine the most influential parameters on specific wear rate. The experimental results showed that filler content had the greatest effect on specific wear rate, followed by sliding distance, while sliding velocity showed a negligible effect. Examination of worn surfaces revealed features associated with adhesion of the matrix to fibers as well as microcracking and debris formation.
1) The document investigates the effect of carbon fiber content on the mechanical properties of hybrid composite laminates made of woven carbon, glass fibers and epoxy resin.
2) Specimens with different carbon fiber percentages were tested for tensile strength, compression strength, impact strength, and flexural strength.
3) The results showed that increasing the carbon fiber content increased the mechanical properties of the composite laminate in all tests. The specimen with the highest carbon fiber content performed best mechanically.
MECHANICAL PROPERTIES OF SIC AL2O3FILLED GLASS EPOXY COMPOSITESIAEME Publication
In the present study, glass-epoxy based composites were fabricated by filling with nano size SiC and Al2O3 filler particles. The hand lay-up approach was used for fabrication of random oriented short E-glass fibre reinforced epoxy composites filled with SiC and Al2O3 powder particles. The volume percentage of filler materials in the composites were varied, SiC was varied from 0, 5 and 10%, whereas Al2O3 was kept constant at 5%. Mechanical characterization were studied effectively. The filled and unfilled SiC and Al2O3particles, were tested for micro-hardness, tensile strength, and flexural strength in according with ASTM standards. It was observed from the studies that using particles as fillers improved the mechanical properties of the E-glass fibre substantially.
Experimental Determination of Mechanical and Vibration Properties of Epoxy ba...IJMERJOURNAL
ABSTRACT: The organic polymer composites filled with inorganic fillers became an important area of research and development in recent years due to their applications in various fields. The aim of the present work was to fabricate and evaluate the mechanical performance of epoxy polymer composites filled with 30% weight percentage of carbon fiber and 2%, 4%, 6%, 8% of Silicon Carbide. The samples were prepared by hand layup technique as this method was easy to fabricate and having low tooling cost and results in the good surface finishand then composites weretested by using UTM and ATALON FFT analyzer. The DEWESOFT software was used to obtain the frequency response functions of the samples. The variations in properties with respect to change in weight of silicon carbide were obtained and represented by graphs. The composite with 30% of carbon fiber and 8% of Sic have shown improved performance in terms of flexural strength, tensile strength, tensile modulus and higher natural frequency indicating high stiffness value.
This document describes the design and analysis of a leaf spring made of sisal fiber reinforced glass epoxy composite. It begins with an abstract that outlines the goal of replacing steel leaf springs with composites to reduce weight and increase fuel economy. It then reviews relevant literature on composite leaf springs. The objectives and methodology are described, including fabrication of composite specimens using hand layup. Tests are performed to determine material properties and compare different fiber volume fractions. A steel leaf spring is modeled and analyzed in ANSYS to determine stresses and deflection. A composite leaf spring is also modeled and tested experimentally to verify analytical and FEA results. The composite leaf spring shows stresses within acceptable limits for the material.
This document summarizes a study on the structural properties and characterization of clay-based hybrid nanocomposites. Glass-epoxy composites were fabricated with halloysite nanotubular clay particles using hand lay-up technique. The composites containing 1%, 2%, and 3% halloysite nanoclay by weight were characterized using X-ray diffraction. XRD analysis showed that the intensity of diffraction peaks increased with higher nanoclay content, indicating improved dispersion of clay particles in the matrix. Pin-on-disk wear tests found that composite with 2% nanoclay exhibited the lowest wear rate, as clay particles improved the mechanical properties and wear resistance of the epoxy polymer matrix.
IRJET- A Review: Effect of Carbon Fiber on Different Mixes of ConcreteIRJET Journal
The document reviews research on the effect of adding carbon fibers to concrete mixes. It summarizes several studies that tested how different percentages of carbon fiber content affected the compressive, tensile, and flexural strengths of various concrete grades. The studies found that carbon fibers increased strength properties like compressive strength by up to 2%, flexural strength by up to 45%, and tensile strength by up to 11%. Higher fiber contents of 0.75-1.0% produced the largest improvements in strength, especially at later curing periods of 14-28 days. Carbon fibers improved durability, cracking resistance, and other concrete properties.
Shellfish shell as a Bio-filler: Preparation, characterization and its effec...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Review of Tribological characteristics of Modified PEEK Compositesvivatechijri
The behavior of and structure with use of polyetheretherketone (PEEK) composites are summarized
here in details. The research progress of friction and wear resistance properties as a tribological charaterstics
of PEEK composites with modified by carbon fiber, other nano scale and micro-scales particles, are also
summarized scopes for further future research ahead are put forward
EFFECT OF SHORT GLASS FIBER AND FILLERS ON DRY SLIDING WEAR BEHAVIOUR OF THER...IAEME Publication
The dry sliding wear behaviour of thermoplastic copolyester elastomer (TCE) reinforced with fibers and fillers were slid against a steel counter face of a pin-on-disc tribometer. The filler and fiber reinforcements used are polytetrafluroethylene (PTFE), short glass fiber (SGF), short carbon fiber (SCF), silicon carbide (SiC), and alumina (Al2O3). The parameters like filler content, sliding velocity and sliding distance on the specific wear rate have been investigated. In this study, a plan of experiments based on the techniques of Taguchi was performed to acquire data in a controlled way.
Mechanical Behavior of Polymer Matrix Composite Materials Reinforced With Cer...IJCMESJOURNAL
In the present work, the mechanical properties of PMC specimens with various types of ceramic reinforcements were investigated. The PMC specimens were reinforced with glass, carbon fibers and Kevlar. The effect of the % content of the reinforcement material in the matrix and the effect of the applied strain velocity (2,4,6 mm/min) were found to affect the mechanical properties of the specimens.
IRJET- Review on Mechanical Characteristics of Synthetic Fibers based Composi...IRJET Journal
This document reviews the mechanical properties of synthetic fiber composites. It discusses how composites made from fibers like glass, Kevlar, and rubber powder have high strength and are attractive materials. The document outlines the materials and process used to create Kevlar fiber reinforced epoxy composites. Tensile and flexural tests are used to evaluate the mechanical properties of the synthesized composites. Results are expected to show that hybridizing Kevlar and glass fibers will improve properties like load carrying capability and impact resistance.
A comparative study on the influence of MWCNT, GO, and Al(OH)3 gel matrix mo...Adib Bin Rashid
The main objective of this paper was to identify the influence of different filler materials on the properties of hybrid composites. The hybrid composites were fabricated using randomly oriented glass fiber mats, needle punched jute fiber mats, and epoxy resin as the matrix material. Three different kinds of filler materials were studied: Multi-Walled Carbon Nanotubes (MWCNTs), Graphene Oxide (GO), and Aluminum Hydroxide (AlOH)
nanoparticles. The secondary reinforcements were dispersed in the epoxy matrix through ultrasonication. The
composites were made by conventional hand lay-up followed by applying high pressure and temperature under a hydraulic press to effectively cure and minimize voids within the final composite. These were compared with the
properties of the unmodified composite containing no filler. The influence on mechanical properties was evaluated through tensile, flexural, and impact tests. Failure modes of the fractured tensile specimen were observed
through Scanning Electron Microscopy (SEM). Fourier Transform Infrared (FTIR) analysis was done to observe
the changes in the chemical structure upon the addition of secondary reinforcements. Lastly, water absorption
behavior and flame retardancy were observed as well. The results showed that MWCNT resulted in the composite
exhibiting superior properties and GO, on the contrary, led to the deterioration of the properties. This could be
because an optimum concentration of MWCNT was used, whereas this was not the case for GO filler. The addition
of MWCNT resulted in a more substantial but brittle composite, while AlOH enhanced the ductility of the
composite by compromising the overall strength. Hence, it can be concluded that MWCNT resulted in the formation of composites with the most desired properties.
The document describes an experimental study that characterized and compared the mechanical and tribological properties of epoxy composites reinforced with either short glass fibers or short banana fibers. Composites with various fiber loadings were fabricated and their density, hardness, tensile strength, flexural strength, impact strength, and erosion wear resistance were measured using standard tests. The results showed that while the banana fiber composites had lower strength properties than the glass fiber composites, their erosion wear resistance was better, indicating banana fibers' potential as a reinforcement material that could replace glass fibers in some applications.
Mechanical Properties of Cement Replaced Concrete With Rice Husk Ash and Addi...IRJET Journal
This document summarizes a study on the mechanical properties of concrete where part of the cement was replaced with rice husk ash and polypropylene fibers were added. The study found that replacing 10% of cement with rice husk ash increased the compressive and flexural strength of concrete compared to normal concrete. Replacing more than 10% of cement or adding more than 0.5% polypropylene fibers resulted in lower strengths. The optimal mix was found to be 10% cement replacement with rice husk ash, which showed improvements in strength properties.
This document discusses the design and analysis of a composite bolt made of glass fiber and epoxy resin. It begins with an abstract that outlines the objectives of creating a low-cost composite bolt using glass fiber reinforcement in an epoxy matrix. It then reviews previous literature on composite materials and bolted joints, which found that addition of glass fibers increases strength and stiffness. The document describes the materials and methods used, including hand lay-up of epoxy resin reinforced with glass fibers. It presents results of testing the composite bolts and comparing the mechanical properties of unidirectional and bidirectional fiber orientations.
Role of Natural and Synthetic Fillers on Erosive Wear Behavior of Basalt -Epo...IJRES Journal
An investigation was made to evaluate the effect of the incorporation of bio-based jatropha oil cake (JOC), Titanium dioxide (TiO2) and Clay on the erosive wear behavior of Basalt-epoxy (BE) hybrid composites. A Vacuum-Assisted Resin Infusion (VARI) technique was employed to obtain a filled and unfilled B-E composites. The effect of different impact velocities (20 and 40 m/s) and angle of impingement from 300 to 900 on the performance of the wear resistance of the composites were measured. The results of erosive wear losses, angle of impingement, and impact velocity and erosion rate of 3% of TiO2 and JOC filled and unfilled B-E composites are analyzed and discussed. The worn surface features of unfilled and filled B-E composites were examined using Scanning Electron Microscopy (SEM).
Study on Effect of Thickness and Fibre Orientation on a Tensile and Flexural ...IJERA Editor
This project presents the study of tensile, flexural & moisture absorption properties of composites made from S-glass, Carbon and E-glass fibre. The specimens are prepared using hand lay-up techniques as per ASTM standard for different thickness 2mm and 3mm and fibre orientation of 30º, 45º and 60º, where an attempt is made to study the properties of composite materials by composing the different materials together to obtain the desired properties by increasing the thickness and fibre orientation. By the variation of thickness tensile strength of hybrid composite is observed for each thickness and is compared with the finite element analysis results. The test ready specimens were subjected to tensile and flexural loads on UTM. This research indicates that tensile strength is mainly dependent on the fiber orientation & thickness of laminated polymer composites. The moisture absorption increases with the fibre, filler content and duration of immersion in water.
This document presents a study on the effect of thickness and fiber orientation on the tensile and flexural properties of a hybrid composite made from S-glass, carbon, and E-glass fibers. Specimens of different thicknesses (2mm and 3mm) and fiber orientations (30°, 45°, 60°) were prepared and tested according to ASTM standards. The test results showed that tensile strength was dependent on fiber orientation and thickness. Specifically, tensile strength increased with thickness and was highest at a 30° fiber orientation for both the 2mm and 3mm specimens.
A new nano ceria reinforced epoxy polymer compositeiaemedu
This document summarizes research on developing a nano-ceria reinforced epoxy polymer composite with improved mechanical properties. Nano-ceria particles around 10-20nm in size were synthesized and added in varying weight percentages to an epoxy resin matrix. Flexural strength increased by 42% with 0.25wt% nano-ceria, while compressive strength increased by 42.7% with 0.5wt% nano-ceria. Microhardness also improved with 1wt% nano-ceria. The mechanical properties generally improved up to a maximum filler content then decreased at higher loadings, likely due to non-uniform dispersion and agglomeration of nano-particles. The study demonstrated enhanced mechanical properties of
Similar to Study of the effects of carbon and glass fibre reinforcement and other fillers on elevated temperature resistant properties of er matrix composites (20)
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
This document summarizes a study on stabilizing expansive black cotton soil with the natural inorganic stabilizer RBI-81. Laboratory tests were conducted to evaluate the effect of RBI-81 on the soil's engineering properties. The tests showed that with 2% RBI-81 and 28 days of curing, the unconfined compressive strength increased by around 250% and the CBR value improved by approximately 400% compared to the untreated soil. Overall, the study found that RBI-81 effectively improved the strength properties of the black cotton soil and its suitability as a soil stabilizer was supported.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
Abstract
Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
This document summarizes a study on the influence of compaction energy on soil stabilized with a chemical stabilizer. Laboratory tests were conducted on locally available loamy soil treated with a patented polymer liquid stabilizer and compacted at four different energy levels. The study found that increasing the compaction effort increased the density of both untreated and treated soil, but the rate of increase was lower for stabilized soil. Treating the soil with the stabilizer improved its unconfined compressive strength and resilient modulus, and reduced accumulated plastic strain, with these properties further improved by higher compaction efforts. The stabilized soil exhibited strength and performance benefits compared to the untreated soil.
Geographical information system (gis) for water resources managementeSAT Journals
This document describes a hydrological framework developed in the form of a Hydrologic Information System (HIS) to meet the information needs of various government departments related to water management in a state. The HIS consists of a hydrological database coupled with tools for collecting and analyzing spatial and non-spatial water resources data. It also incorporates a hydrological model to indirectly assess water balance components over space and time. A web-based GIS portal was created to allow users to access and visualize the hydrological data, as well as outputs from the SWAT hydrological model. The framework is intended to facilitate integrated water resources planning and management across different administrative levels.
Forest type mapping of bidar forest division, karnataka using geoinformatics ...eSAT Journals
Abstract
The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
Abstract
To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
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punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
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Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
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the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
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through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
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pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
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Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
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pipeline politics, and winning states, according to this study, thanks to important instruments like the
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Study of the effects of carbon and glass fibre reinforcement and other fillers on elevated temperature resistant properties of er matrix composites
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 182
STUDY OF THE EFFECTS OF CARBON AND GLASS FIBRE
REINFORCEMENT AND OTHER FILLERS ON ELEVATED
TEMPERATURE RESISTANT PROPERTIES OF ER MATRIX
COMPOSITES
Md Nadeem M 1
, K Chandrashekara 2
, Yathisha N3
, Rudramurthy 4
1
Department of Mechanical Engineering, ATME College of Engineering, Mysore, Karnataka, India
2
Department of Mechanical Engineering, SJCE, Mysore Karnataka, India
3
Department of Mechanical Engineering, ATME College of Engineering, Mysore, Karnataka, India
4
Department of Mechanical Engineering, SJCE, Mysore Karnataka, India
Abstract
In the present study, composite materials required for elevated temperature applications were fabricated using vacuum bagging
technique. Epoxy Resin (ER-VP401) was used as the matrix and Glass fibre was used as reinforcement. SiC, Al2O3 and others
were used as fillers to bring in elevated temperature resistance. These composites were subjected to mechanical tests like Tensile,
Hardness and Impact test. Tribological tests like two body abrasion and Pin on disc (POD) were carried out. Tensile strength,
hardness and impact energy were improved with increase in fillers content. Wear resistance also improved with increase in
percentage of fillers substantially. SEM micrographs are used to explain the mechanism of the material strengthening at elevated
temperatures.
Keywords: Epoxy resin, Glass Fiber (GF), Al2O3, SiC, Elevated Temperature Resistance.
--------------------------------------------------------------------***-----------------------------------------------------------------
1. INTRODUCTION
The materials used to manufacture various products are
supposed to fulfill several criteria before being approved.
Some of the criteria are the results of regulation and
legislation with the environmental and safety concerns and
some are the requirements of the customers. Composite
material is a combination of two or more materials to form a
new material system with enhanced material properties.
After being solely used for their electromagnetic properties
(insulators and radar-domes), using composites to improve
the structural performance of spacecraft and military aircraft
became popular in the last two decades. Nowadays, cost
reduction during manufacturing and operation are the main
technology drivers. Fibers or particles embedded in matrix
of another material are the best example of modern-day
composite materials.
For most structural applications in the current aircraft
designs, polymer composites has been adequately used and
implemented for a wide range of applications in areas where
high temperatures are encountered. The usage of such
composites, even for primary loadbearing structures in
military fighters, transport aircraft, satellites and space
vehicles has been beneficially realized. Attention is now
focused on expanding the usage of such composites to other
areas where temperatures could be higher in the range of
200-400o
C [1]. Multi-Walled Carbon Nanotubes
functionalized with amino groups (MWCNT-NH2) via
chemical modification of the carboxyl groups introduced on
the surface of MWCNT. The thermal diffusivity and
conductivity of all of the composites continuously improved
with increasing content of fillers [2]. The behavior of Glass
Fiber-Reinforced Polymer (GFRP) bars subjected to
extreme temperatures is very critical for industrial
applications. They evaluated the variation of mechanical
properties of sand-coated GFRP reinforcing bars subjected
to low temperatures (ranging from 0 to −100°C ) and
elevated temperatures (ranging from 23 to 315°C). Tensile,
shear and flexural properties improved as the glass fiber
content increased [3]. The effect of addition of Silicon
Carbide (SiC) filler in different weight percentages on
physical properties, mechanical properties, and thermal
properties of chopped glass fiber-reinforced epoxy
composites has been investigated. The result showed that the
physical and mechanical properties of SiC-filled glass fiber-
reinforced epoxy composites were better than unfilled glass
fiber-reinforced epoxy composites [4]. [5] Presented results
of an experimental and analytical study about the
mechanical behavior at elevated temperatures of Glass Fiber
Reinforced Polymer (GFRP) pultruded profiles made of
polyester resin and E-glass fibers. [6] observed the
mechanical properties of Vapor Grown Carbon Nano fiber
(VGCNF)polymer composites. They studied the structural
and intrinsic mechanical properties of VGCNFs. Then the
major factors (filler dispersion and distribution, filler aspect
ratio, adhesion and interface between filler and polymer
matrix) affecting the mechanical properties of
VGCNF/polymer composites were presented. The effect of
fiber content and fiber orientation on the strength of
composites was studied to estimate the tensile strength out
of fibre orientation and fibre content [7].
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 183
The F584/PW Pre-Impregnated materials (prepregs)
presented the highest values of tensile strength while the
highest modulus results were obtained for the 8HS
composite laminates [8]. [9] Conducted a research on epoxy
resin polymers reinforced with natural fibers like Sisal,
Banana and Roselle and three hybrid combinations of any
two fibers. Less elongation and fiber pull out and brittle
nature of fracture were observed in fiber based composites
while more elongation, fiber pull out and partial brittle
nature of fracture were observed in hybrid composites. It
was seen from the results that well dispersed Nano particles
of CaCO3 up to the weight percentage of 15 increases the
impact strength of the composite [10]. [11] Conducted
impact tests on aluminum filled milled (carbon and glass)
fiber reinforced epoxy based polymer composites. The
milled fiber addition slightly increased the impact resistance
of the composites. [12] Studied the impact resistance of
epoxy based composites reinforced with fiber and hybrid of
sisal, banana and Roselle fibers. The results showed that the
hybrid composites absorbed more impact energy before
fracture. The greater level of fiber pull out observed in
specimens fabricated using hybrid reinforcement, leads to
superior impact strength. The effect of the reinforcement of
thermosetting polyester with short glass fibers on
mechanical properties and tribological behavior was studied.
The friction and wear-behavior as a function of sliding
speed and fiber-glass proportion (0 to 50%). Wear resistance
behavior increased with increase in glass fiber and filler
content [13]. [14] Investigated that the tribological behavior
was found to depend on the filler materials in the tested
composites and better results were obtained for the
composite containing solid lubricants
(Polytetrafluoroethylene (PTFE) and graphite). [15]
Observed that the wear loss increases with increase in
normal load. The optimum wear reduction was obtained
with 40% fiber content.
The objective of the present study is to investigate the effect
of filler materials on the mechanical properties of the
selected polymer matrix composite at elevated temperature.
The composition of the specimens is given in table-1.
2. MATERIALS AND METHODS
Table-1: composition of the specimens
Components' percentage
by weight
Specimen No
1 2 3 4 5
Epoxy Resin 50 50 50 50 50
Activated Carbon Powder 10 10 10 10 10
Chopped E - Glass fiber 10 10 10 10 10
Sodium Sulphide ( Na2S ) 5 5 5 5 5
Sintered Clay 5 5 5 5 5
Silicon Carbide ( SiC ) 20 15 10 5 0
Aluminium Oxide( Al2O3) 0 5 10 15 20
2.2 Specimen Preparation and Experimental Set Up
Table I gives the materials used in the present study. Epoxy
resin is kept constant at 50 Wt%. Activated carbon powder
and chopped E glass fibre were kept at 10 Wt% respectively,
sodium sulphide and sintered clay were used as fillers to
bring in elevated temperature resistance properties and they
were kept at 5 Wt% each. Silicon carbide (SiC) and
Aluminum oxide (Al2O3) were varied from 0-20 Wt% each.
First the materials are weighed as required, and then they are
put together and mixed well. The mixture is then poured into
a prepared mould of the required thickness. It should be
noted that the epoxy resin and hardener start to set i.e. start
solidifying after 30 minutes of mixing and hence, the
mixture should be poured into the mould before the setting
time. The mixture is poured in excess and suitable weights
are applied on it. Similarly, five different compositions are
poured in separate moulds by varying the SiC and Al2O3
content while keeping all the other weight percentages
constant. The content of SiC and Al2O3 are varied in steps of
five percent in such a way that in any composition, the sum
of SiC and Al2O3is 20 percent of the total weight. The
moulds are then left for 24 hours to solidify and cure at
room temperature. After solidification, the specimens are
removed from the mould and post cured at 100o
C for 2
hours in a hot air oven. The specimens are then taken out
and labeled. The specimens are then marked as per the test
standards. Specimens were prepared for tensile, impact
strength and wear tests. Figure-1 shows the specimen
preparation pictures.
(a) Weighing the constituents (b) Mixing the constituents
in right Proportion
(c) Pouring the mixture into the (d) Specimens Moulds
Fig-1- Preparation of Specimens
To determine the mechanical properties of the material the
following tests were conducted.
A. Tensile test- Tensile tests were conducted according
to the ASTM D-638. Computerized Universal Testing
Machine (UTM) used for this purpose and the loading
arrangement is shown in Figure. 2(a). Specifications
are also mentioned. The dimension of the tensile
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 184
specimen was 165 mm x 19 mm x 3.2 mm. Gauge
length was 50 mm. Results were used to calculate the
tensile strength of composite samples.
B. Impact test - Izod impact tests were conducted on V-
notched composite specimen according to ASTM
D256. A Pendulum impact tester, shown in Figure
2(b) was used for this purpose. Dimension of the
specimen were 64 mm x 12.5 mm x 3.2 mm. The
pendulum impact testing machine ascertains the
impact strength of the material by shattering the
specimen with a pendulum hammer, measuring the
spent energy and relating it to the cross section of the
specimen. The respective values of impact energy of
different specimen are recorded directly from the
digital indicator and reported.
C. Hardness test - Shore-D hardness tests were
conducted on specimen according to ASTM D2240
using Durometer shown in Figure 2(c). The hardness
tester is placed on the specimen and pressure is
applied so that the flats underneath the tester touch
the surface of the specimen. The readings are taken
directly from the dial. The specimens are then heated
to different temperatures and the readings are taken to
determine the variation in the hardness of the
specimen with respect to temperature.
D. Wear test - Wear tests were conducted according to
the ASTM using Pin on Disc Machine (POD).The
machine and its specifications are given in Figure
2(d). Dry sliding tests were conducted at ambient
conditions with the loads of 4 Kg, 8 Kg, 12 Kg and
16 Kg. Disc speed was kept at 1000rpm with track
diameter of 40mm, resulting in a sliding velocity of
3.92 m/s. The tests were conducted for two minutes
or the length of time until the specimen withstands
the maximum load and failed whichever being the
earliest. The temperature of the tip of the specimen
was registered using the optical pyrometer. Wear of
the materials considered was measured by loss in
length which is then converted into wear volume
using the measured cross-sectional area data. The
specific Wear rate (Ks) was calculated from the below
equation (1).
𝐾𝑠 =
∆𝑉
𝑃 × 𝐷
𝑖𝑛
𝑚3
𝑁 − 𝑚
Where, ∆V is the volume loss in m3
, P is the load in
Newton; D is the sliding distance in meters.
(a) Tensile testing machine setup (UTM) (b)
Computerized impact testing machine
(c) Shore-D hardness testing machine (d) Pin on disc
machine
Fig-2- Testing machines
3. RESULTS AND DISCUSSIONS
Physical and mechanical properties describe the behavior of
materials when they are used in practical applications. The
properties such as hardness describe the physical state of the
system. The mechanical property of the material is a
measure of the behavior of the material under different
loading conditions. Tests were done to notice the effect of
variation of filler content on the physical and mechanical
properties and the optimum filler loading of carbon-glass
reinforced polymer composites at which specific Specific
Wear rate is least.
3.1 Effect of SiC and Al2O3 on Tensile Strength of
Carbon-Glass Reinforced Polymer Composites
The tensile strength is an engineering value that is calculated
by dividing the maximum load on the material by the initial
cross sectional area of the test specimen. The Table II shows
the results obtained during the tensile test conducted on all
the five specimens.
Table-:2 tensile strength of cgrp composites
Specimen
No.
Filler Content
Ultimate Tensile
Strength ( MPa )
1
20% SiC, 0%
Al2O3
15.38
2
15% SiC, 05%
Al2O3
17.31
3
10% SiC, 10%
Al2O3
19.35
4
05% SiC, 15%
Al2O3
20.98
5
0% SiC, 20%
Al2O3
25.28
The graph for the tensile strength is shown in Figure 3.1
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 185
Fig 3.1 – Effect of SiC and Al2O3 on Ultimate Tensile
Strength (UTS) on CGRP Composites
From the graph 3.1, it can be seen that the tensile strength is
highest in the composite with 20% Al2O3 and no SiC, and
lowest in that with 20% SiC and no Al2O3. The tensile
strength increases proportionally with the increase in Al2O3
content and decrease in SiC content since the tensile
strength of Al2O3 is higher than that of SiC. But complete
absence of SiC in the fifth composite specimen results in a
higher tensile strength which is not in proportion with the
tensile strengths of other specimens. This is due to the
presence of higher percentage of Al2O3 alone and no SiC.
The Al2O3 particles which fill the composite, due to their
higher tensile strength can withstand more loads and transfer
it to the adjacent particle at the same time, thus reducing the
load concentration at a single point which in turn reduces
the stress concentration thereby increasing the ultimate
tensile strength of the specimen. Also, the Al2O3 particles
which are smaller than the SiC particles have a higher
density compared to the SiC density. The higher density
results in a uniform and continuous distribution of the filler
and lower bonding surface resulting in increase in bonding
strength which also results in increase in the tensile strength
of the specimen.
The specimen with 20% SiC and 0% Al2O3 has the least
tensile strength of the five compositions. This is due to the
low tensile strength of SiC and its larger particle size. While
the low tensile strength of SiC hampers the tensile strength
of the specimen directly by failing at lower loads, the larger
particle size of SiC results in a discrete distribution of filler
along with an increase in bonding surface area which
decreases the binding strength, thereby decreases the tensile
strength of the specimen.
3.2 Effect of SiC and Al2O3 on Impact Strength of
Carbon-Glass Reinforced Polymer Composites
The material’s resistance to fracture is known as toughness.
It is the energy absorbed by the material before fracture and
is expressed in terms of the same. A ductile material can
absorb considerable amount of energy before fracture while
a brittle material absorbs very little energy before fracture.
Table IIIshows the results obtained during the impact test
conducted on all the five specimens.
Table-3: Impact Strength Of Cgrp Composites
Specimen
No.
Filler Content
Impact
Energy ( J )
1 20% SiC, 0% Al2O3 1
2
15% SiC, 05%
Al2O3
0.45
3
10% SiC, 10%
Al2O3
0.45
4
05% SiC, 15%
Al2O3
1.3
5 0% SiC, 20% Al2O3 0.6
The graph for the impact strength is shown in Figure 3.2
Fig. 3.2 - Effect of SiC and Al2O3 impact strength on CGRP
Composites
From table III, it is observed that the impact energy is the
highest for the composite having 05%SiC and 15%Al2O3.
The fracture toughness for SiC is 1.5 times greater than that
of Al2O3.Glass fiber has least fracture toughness, at the
highest percentage of silicon impact strength is 1J, but it has
decreased to 0.45J.It has remained the same for the further
decrease in SiC, indicating the fracture toughness of both
SiC and Al2O3 are contributing to the increase in impact
strength, contribution from Al2O3 being higher. This
emphasizes the further increase in Al2O3 percentage has
increased the impact strength significantly (up to 15% of
Al2O3).
The conclusion is that relatively lesser percentage of SiC is
a must for increase in impact strength irrespective of
increase in Al2O3.This observation is evident as the impact
strength has decreased drastically for 0% of SiC.
3.3 Effect of SiC and Al2O3 on Wear Resistance of
Carbon-Glass Reinforced Polymer Composites
Wear is the sideways erosion of material on a solid surface
due to the action of another surface. A material is said to
possess good wear properties when less amount of material
gets eroded due to the friction. Table 3.3 shows the results
obtained during the wear test conducted on all the
specimens.
15
20
25
30
Filler Content
UTS(MPa)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
Filler Content
ImpactEnergy(J)
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_______________________________________________________________________________________
Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 186
Speed of the disc = 1000 rpm = 4.18 m/s
Radius of the disc = 40 mm
Diameter of each specimen = 6 mm
Length of each specimen = 30mm
Table 4: wear properties of cgrp composites
Figure 3.3 shows the variation of Specific Wear rate with
respect to weight graphically
Fig. 3.3 – Effect of SiC and Al2O3 on Wear resistance of
CGRP Composite at maximum load
3.4 Effect of Temperature on Hardness of Carbon-
Glass Reinforced Polymer Composites
Hardness is a measure of how resistant a solid matter is to
various kinds of permanent shape change when a force is
applied. The hardness readings of the specimens were
obtained directly from the Shore-D hardness tester. The
specimens were heated to six different temperatures by a hot
air oven and the readings were taken. Table V shows the
readings thus obtained.
Table 5: Effect Of Temperature On Hardness Of Cgrp
Composites
Specimen No.
Temperature ( o
C )
2
7
5
7
8
7
11
7
14
7
17
7
20
7
Shore-D Hardness no.
1 - 20% SiC, 0%
Al2O3
9
0
8
8
8
5
80 71 71 58
2 - 15% SiC, 05%
Al2O3
8
9
8
8
8
7
86 86 80 70
3 - 10% SiC, 10%
Al2O3
8
5
8
4
8
4
82 78 73 58
4 - 05% SiC, 15%
Al2O3
8
9
8
8
8
8
86 72 65 63
5 - 0% SiC, 20%
Al2O3
8
9
8
7
8
4
80 78 65 64
Average Shore-D
Hardness no
8
9
8
7
8
6
83 77 71 63
Fig. 3.4 – Variation of Shore-D hardness of CGRP
Composites with temperature
Fig. 3.5 – Variation of average hardness of CGRP
Composites with temperature
0
2
4
6
8
10
12
14
12Kg
Load
(9.81N
)
Filler Content
SpecificWearrrate
(10-5mm3/Nm)
50
55
60
65
70
75
80
85
90
27 57 87 117 147 177 207
20%SiC,0%Al2
O3
15%SiC,05%Al
2O3
10%SiC,10%Al
2O3
05%SiC,15%Al
2O3
0%SiC,20%Al2
O3
Temperature (oC)
Shore-DHardnessNo.
60
65
70
75
80
85
90
95
100
27 57 87 117 147 177 207
Temperature (oC)
Shore-DHardnessNo.
Speci
men
No.
Load(N)
39.24 78.48 117.72
1
Specific
Wear rate
(mm3
/Nm )
2.722 x
10-5
7.23 x
10-5
13.19 x
10-5
2
Specific
Wear rate
(mm3
/Nm )
9.88 x
10-5
8.814 x
10-5
8.743 x
10-5
3
Specific
Wear rate
(mm3
/Nm )
3.14 x
10-5
6.28 x
10-5
8.743 x
10-5
4
Specific
Wear rate
(mm3
/Nm )
2.28 x
10-5
7.57 x
10-5
5.712 x
10-5
5
Specific
Wear rate
(mm3
/Nm )
2.86 x
10-5
5.589 x
10-5
4.52 x
10-5
6. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 187
It could be seen from the Table V and Fig 3.5 the average
Shore-D hardness value obtained at room temperature for
the entire specimen considered irrespective of the
percentage by weight of SiC and Al2O3 is 89. Similarly, the
average values of hardness for considered specimen at
temperatures greater than the room temperature is steps of
30o
C upto 207o
C are 87,86,83,77,71,63.
From 27o
C (room temperature) to 117o
C, the hardness value
has decreased by 6.7%, which is not very significant. From
147o
C to 207o
C, the percentage decreased in Shore-D
hardness is 18.2%, which is significant. This means that the
considered specimen can retain their hardness up to 120o
C.
Hardness of the SiC is 2.3 times greater than that of Al2O3,
the thermal conductivity of SiC is 6.6 times greater than that
of Al2O3.Whereas,the coefficient of thermal expansion of
Al2O3 is 2 times greater than that of SiC.
At room temperature, the average value of Shore-D hardness
is about 89.This value has decreased slightly up to
87o
C,from 87o
C up to 117o
C the decrease in value is about
3.48%.Further increase in temperature in steps of 30o
C up to
207o
C,the percentage decrease is 6.89%.
The reason is that higher percentage of SiC has contributed
to the average hardness of all the specimens considered up
till 117o
C.Slight Decrease in hardness in this temperature
range is attributed to increase in percentage of Al2O3, which
has got comparatively higher hardness, beyond 117o
C one
must note that SiC percentage has decreased and Al2O3
percentage has increased.
By the order of magnitude of hardness of SiC and Al2O3 it is
evident that the hardness has decreased quite drastically up
to 207o
C .The synergy of these fillers has come to play up to
117o
C and it has seized to exist from 117o
C to 207o
C.
4. SEM MORPHOLOGY
Fig 4.1 – SEM micrograph (500 X Magnification) of CGRP
composite with subjected to tensile test
From the Table III, it is observed that tensile strength is
increasing with increase in percentage of Al2O3,it is 64.36%
increased which is very significant.
The variation is also linear; the increasing tensile strength up
to 15% Al2O3, for every 5% addition of Al2O3 increasing in
tensile strength is 10.91%.Whereas, increase in tensile
strength for 5% more addition of Al2O3 ,increases the tensile
strength is 20.49%.One can observe that, the order of
magnitude of increase in tensile strength for 5% more
addition is almost twice.
SiC has 410GPa elastic modulus, whereas Al2O3 has
300GPa,it is evident that increase in tensile strength for the
decrease in SiC is around 10% and increase in 5% of Al2O3
when SiC has become 0 is 20%.Hence,elastic modulus of
SiC and Al2O3 are contributing to the increase in overall
tensile strength.
These observations are also evident from SEM
micrographs(Fig-4.1). As could be seen from the plate,GF
have got pulled out from the matrix, whereas more GFs have
broken in a brittle manner. These surfaces bonding energy
between GF and resin is lesser when compared with that of
Al2O3,SiC and other fillers. This means that the contribution
of GF for the increase in tensile strength is not significant. It
is the larger interfacial attractive forces between the fillers
and their properties which have contributed to the increase
in tensile strength. It can also be observed from SEM
micrographs that very few of these particles are still in their
location and these have not fractured.
Fig 4.2 – SEM micrograph (500 X Magnification) of CGRP
composite with subjected to Impact test
Fig 4.3 – SEM micrograph (1.0K X Magnification) of
CGRP composite with subjected to Impact test
7. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 03 Issue: 10 | Oct-2014, Available @ http://www.ijret.org 188
Figure 4.2 and 4.3 is showing SEM micrograph of the
specimen having 5% SiC and 15% Al2O3, giving the highest
value of impact strength. The main fractured constituent due
to impact load are glass fibers which have got the lowest
fracture toughness (1MPa m1/2
), these are indicated by the
fractured glass fibers appearing as bright cylindrical
columns. Most of the other particles have got embedded in
the matrix including some broken GFs, this is appearing as
the darker fibrous spot.
Obviously, the increase in impact strength is basically due to
the presence of higher percentage of Al2O3 and lower
percentage of SiC.
Fig 4.4– SEM micrograph (1.0K X Magnification) of CGRP
composite with subjected to wear test
Figure 4.4is showing SEM micrographs for the specimen
having 10%SiC, 10%Al2O3 at the maximum load.The wear
Debris of GFsappears as shorter brighter particles. Bright
smaller dot represent Al2O3 and somewhat larger bright
spots are representing SiC particles. The Graphite, carbon
and sodium sulphide which have been used as lubricants do
not appear predominantly for identification.
One can observe from the micrographs that the wear debris
of glass fiber and the filler particles have got embedded on
the plateaus formed on the surface of composite, the
particles which are not worn are present in the dark portions
of the SEM micrographs.
Higher thermal conductivity of SiC has softened the matrix
which softened the matrix which facilitated the formation of
plateaus, which have created a protective shield against
wear.
5. CONCLUSIONS
The present study and analysis of results had led to the
following conclusions
1. 10% Al2O3 and 10%SiC has shown minimum
Specific Wear rate (4.39*10-4
mm3
/Nm) and could
be considered as optimum percentage of these fillers
for further development.
2. The impact energy for the composite having 05%
SiC and 15% Al2O3 has shown the maximum impact
strength, which is due to the fracture toughness of
both SiC and Al2O3 are maximum in comparison
with other fillers.
3. The tensile strength increased is 64.36%, which is
very significant this is due to high tensile modulus
of both SiC and Al2O3.
4. The general conclusion is that the addition of SiC
and Al2O3 has significantly contributed to the
improvement in wear resistance, impact and tensile
strengths predominantly by Al2O3.
ACKNOWLEDGEMENTS
The authors thank, Sri Jayachamarajendra College of
Engineering, Mysore 570006, India and ATME College of
Engineering, Mysore 570028 for providing all the support for
carrying out this research.
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