Composites are made by combination of two or more natural or artificial materials to maximize their useful properties and minimize their weaknesses.
Example: The oldest and best-known composites,
Natural: Wood combination of cellulose fibre provides strength and lignin is the "glue" that bonds and stabilizes. Bamboo is a very efficient wood composite structure.
o is a very efficient wood composite structure
Artificial: The glass-fibre reinforced plastic (GRP), combines glass fiber (which are strong but brittle) with plastic (which is flexible) to make a composite material that is tough but not brittle.
70 to 90% of load carried by fibers
Provide structural properties to the composite
Stiffness
Strength
Thermal stability
Provide electrical conductivity or insulation
Example: Glass, Carbon, Organic Boron, Ceramic, Metallic
Function of Fiber/Dispersion phase
Composites are made by combination of two or more natural or artificial materials to maximize their useful properties and minimize their weaknesses.
Example: The oldest and best-known composites,
Natural: Wood combination of cellulose fibre provides strength and lignin is the "glue" that bonds and stabilizes. Bamboo is a very efficient wood composite structure.
o is a very efficient wood composite structure
Artificial: The glass-fibre reinforced plastic (GRP), combines glass fiber (which are strong but brittle) with plastic (which is flexible) to make a composite material that is tough but not brittle.
70 to 90% of load carried by fibers
Provide structural properties to the composite
Stiffness
Strength
Thermal stability
Provide electrical conductivity or insulation
Example: Glass, Carbon, Organic Boron, Ceramic, Metallic
Function of Fiber/Dispersion phase
Composite Materials: A composite material can be defined as a combination of two or more materials that results in better properties than those of the individual components used alone. The two constituents of a composite are a reinforcement and a matrix.
Matrix: The continuous phase is the matrix, made of polymer, metal, or ceramic.
Reinforcement: A strong, inert, woven and nonwoven fibrous material incorporated into the matrix to improve its mechanical and physical properties. For example, fibers, whiskers, particulate etc.
Metal matrix composites (MMCs) possess significantly improved properties including highspecific strength; specific modulus, damping capacity and good wear resistance compared to unreinforced alloys. There has been an increasing interest in composites containing low density and low cost reinforcements. Among various discontinuous dispersoids used, fly ash is one of the most inexpensive and low density reinforcement available in large quantities as solid waste by-product during combustion of coal in thermal power plants. Hence, composites with fly ash as reinforcement are likely to overcome the cost barrier for wide spread applications in automotive and small engine applications.
Composite Materials: A composite material can be defined as a combination of two or more materials that results in better properties than those of the individual components used alone. The two constituents of a composite are a reinforcement and a matrix.
Matrix: The continuous phase is the matrix, made of polymer, metal, or ceramic.
Reinforcement: A strong, inert, woven and nonwoven fibrous material incorporated into the matrix to improve its mechanical and physical properties. For example, fibers, whiskers, particulate etc.
Metal matrix composites (MMCs) possess significantly improved properties including highspecific strength; specific modulus, damping capacity and good wear resistance compared to unreinforced alloys. There has been an increasing interest in composites containing low density and low cost reinforcements. Among various discontinuous dispersoids used, fly ash is one of the most inexpensive and low density reinforcement available in large quantities as solid waste by-product during combustion of coal in thermal power plants. Hence, composites with fly ash as reinforcement are likely to overcome the cost barrier for wide spread applications in automotive and small engine applications.
Compatibilization in bio-based and biodegradable polymer blendsjeff jose
Compatibilization in bio-based and biodegradable polymer blends, Types, properties and application of biopolymers, Physical blending, Miscibility, compatibility, starch/pla blend,Compatiblizers used for starch/PLA blends, Non-reactive compatibilization,Compatibilization strategies in poly(lactic acid)-based blends
applications of polymer blends,
The important points of composite materials are mentioned. This file includes, what is composite materials, its classifications, applications, advantages and disadvantages.
FIBER SELECTION
Factors to consider when choosing glass type include thermal properties; fiber cost, type of manufacturing process being used, and forms of reinforcement
Synthetic polymers - a content written by Dr.Lali Thomas Kotturan about man ...lalikotturan
A polymer is a giant molecule made from small identical repeating molecules called monomers joined together by covalent bonds. The process of interlinking the monomers to form a polymer is called polymerization. The Classification of Polymers is possible based on different parameters. Origin, thermal processing Behavior, Mechanism of polymerization, line structure, physical property, Crystallinity, and Degradability are such parameters. The spatial arrangements of substituents like alkyl, phenyl, chloro groups on the carbon chain of polymer are called tacticity. Based on tacticity polymers are classified into isotactic, syndiotactic, and atactic polymers. Tacticity depends on the temperature of formation and solvent used. Steps involved in addition polymerization or chain-growth polymerization are initiation, propagation, and termination. Polythene is an addition polymer that exists as LDPE or HDPE.LDPE is formed from ethylene at a high pressure of 1500-3000 atmosphere at a temperature range of175-250oC in presence of some oxygen, peroxide, or azocompounds as initiators.LDPE has nearly 20–50 branches (both long and short branches) per 1000 linear carbon atoms in the chain molecules. The polymerization at a low temperature and pressure in presence of metal oxide catalyst results in HDPE. 2–5 short branches or side chains per 1000 carbon atoms in the main chain, thus having a higher density range (0.945–0.96) and high melting temperature (125–130°C) compared to LDPE. Polystyrene is a transparent, amorphous addition polymer of styrene.PMMA is an addition polymer of methyl methacrylate.PAN is an acrylic fiber obtained by addition polymerization of acrylonitrile. Condensation polymerization or step-growth polymerization happens by the intermolecular reaction with the elimination of water, HCl, etc. Monomers of nylon 66 are hexamethylene diamine and adipic acid.
The first 6 in 66 denotes the number of carbon atoms in diamine and the second 6 denotes the number of carbon atoms in diacid. Nylon 6 is formed from caprolactam which has 6 carbon atoms in its ring. Bakelite is a three-dimensional phenol-formaldehyde polymer. Kevlar is an aromatic polyamide formed from-phenylene diamine and terephthaloyl chloride. Terylene is the condensation polymer from ethylene glycol and terephthalic acid. A typical Ziegler Natta catalyst is a mixture of titanium tetrachloride and triethyl Aluminium. This catalyst permits the synthesis of unbranched, stereospecific, high molecular weight polyolefins. The process is coordination polymerization and the product is the cis product. Biodegradable polymers get decomposed by bacteria into natural byproducts such as gases (CO2, N2), water, biomass, and inorganic salts. These polymers are esters, anhydrides or amides. PLA(polylactic acid), PGA (Poly(glycolic acid), and PHBV -Poly(β-hydroxybutyrate-co-hydroxy valerate) are examples of biodegradable polymers. The plastic identification code identifies the type of plastic.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
3. Introduction
• Polymers are using for making
• Fancy decoration items
• Textiles
• Building materials or packing materials
• Light and elegant luggage made of Plastics.
• Plastic chairs to add colour and comfort.
• Armour shield made of Polycarbonate combines
the transparency of glass and strength of steal
4. What is a polymer?
• A long
molecule made
up from lots
of small
molecules
called
• monomers.
8. Polymers replaced metals,
ceramics and wood. Why?
• High strength
• Light weight
• Good flexibility
• Special electrical properties
• Resistance to chemicals
• Ability for quick and more production.
• Fabrication into complex shapes in wide
variety of colours.
10. Glass transion
temperature
Are polymers mostly amorphous,
crystalline, or in-between? Also,
what is the glass transition
temperature?
the Tg of a Rubber band is
below RT
the Tg of polystyrene is above
RT
Glass transition temperature (Tg)
Crystalline transition temperature
(Tc)
Melt Transition (Tm)
Decomposition temperature (Td)
15. Significance:
• Polymers can be used to
• Bond objects
• Seal joints
• Fill cavities
• Bear loads
• Clothing the naked to powering a space vehicle
to even replacing a human organ.
» Artificial heart
» Artificial kidney
• Limbs etc
16. Why composites?
• Individual polymers not alone satisfy our needs.
Search for new materials started and
composites originated.
•
• Composite materials are made of more than one
phase, in order to achieve combined properties
that cannot be met by a single-phase material.
• Composites are able to meet diverse design
requirements with significant weight savings as
w ell as high strength-to- weight ratio
17. What are composites?
• Composite" is a material having two or
more distinct constituents or phases.
• "Polymer composite" is a homogeneous
polymer based material created by the
synthetic assembly of a polymer and
reinforcement to obtain specific
properties.
• Natural composites
• Eg.Bone, mollusc shells and wood
18. Origin of composites
• Charles Macintosh in the middle of the
nineteenth century
• Raincoats are made from two layers of
cotton fabric and embedded them in
natural rubber.
• Rubber -waterproof
• Cotton layers –comfortable to wear.
• Combination of water resistance of
polyisoprene and the comfort of cotton.
20. Advantages over
conventional materials
• Tensile strength of composites is four to six time grater
than that of steel or aluminum
• 30-45% lighter than aluminum structures designed to the
same functional requirenmts
• Composites are versatile than metals
• Long life offers excellent fatigue, impact, environmental
resistance and reduced maintenance
• Composites enjoy reduced life cycle cost compared to
metals
• Exhibit excellent corrosion resistance and fire
retardancy
23. NANOCOMPOSITES
• Composites in which the fiber
reinforcement is on the extremely
small "nano scale" (1*10-9 meters)
are known as nanocomposites
• Clay particles is a common nano-
component in composites
24. Bio composites
• Biocomposites are
materials made by
nature or
synthetically that
include some type
of natural
material in its
structure. The amazing thing is that it grows with the fruit
26. What is a fiber reinforced
polymer plastics?
• Fiber reinforced composites
(FRP) are composites prepared
by the incorporation of fibers
into Plastic material
• Combination of polymeric
substances with solid fillers give
rise to filled composites
30. Fibers
• A wide range of amorphous and
crystalline materials can be used as the
fibre
• Glass fibers –largest used fibers
• Carbon fiber
• Aramid fibers
• Nylon fibers
• Natural fibers
31.
32. What Fibers Do
• Act as a reinforcement
• Increase the overall strength
33. What the Matrix Does
• The matrix holds the fibers together. (binder)
• The matrix can absorb energy by deforming
under stress. The matrix adds toughness to
the composite.
• Fibers have good tensile strength (that is,
they're strong when you pull on them), they
usually have awful compressional strength.
• The matrix gives compressional strength to the
composite.
34. Mechanism of
Reinforcement
• The reinforcement of a low modulus
polymer with a high modulus, high
strength fiber uses the plastic flow of
the polymeric material under stress to
transfer the load to the fibre this
results in a high strength, high modulus
composite.
35. :
• Parameters
• Strength of the fibers and of the
polymer matrix.
• Elastic modulus of the fibers and
of the matrix.
• Aspect ratio of the fibers (L/D)
69. Laminates-a product obtained
by joining two or more layers of a
solid material.
• Parallel laminate-
grains of the
layers are parallel
to each other
• cross laminate-
Some layers are
right angles to
each other
• Adherends-layers
of the materials
are so bonded by
an adhesive
• Plywood-cross
laminate
70. Laminates----
• Laminated plastics-impregnating sheets of
paper, wood, fiber with a resin solution
• Thermosetting resin
• Fiber is passed through a solution of resin
bath
• Dried at suitable temp (< curing temp)
• Cut into suitable size and piled one over
another
• Cured in a hydraulic press 180O
C,
120kg/cm2
71. Laminates---
• Laminated glass-joining glass plates/sheets
with a layers of plastic in between them
• Safety glass-dry sheet of plastic between
two glass sheets
• Thermocole-is a formed plastic –blowing
air/plastic through molten PS or
Polyurethane