The objective of the work was to estimate the elasto-plastic stress and strain behaviour at the root of the notch of
an Al 6061 plate undergoing tensile and compressive cyclic loading by both experimental and numerical
methods. This attempt to measured initial elasto-plastic stresses experimentally then verified by numerically.
The various Kt values such as 2, 4 and 6 specimens were subjected to tensile test using a computerised universal
testing machine. Numerical approach associated with body discretization and developed finite element model
with sufficient degree of freedom to analyses elasto-plastic analysis of notched specimen. Experimental results
show that analysis of three Kt notched specimens had similar behaviour of elasto-plastic behaviour but different
magnitude. The experimental results compare well with the numerical results which are obtained during finite
element analysis of notched specimens.
Hyperelastic material models in finite element analysis of polymersKartik Srinivas
This paper describes the Hyperelastic material models and strain energy functions used in the finite element analysis (FEA) of polymers. Material characterization testing
Uniaxial tension test is used to determine yield strength, Young’s modulus, Poisson’s ratio, true stress-strain. Finite element analysis, Kartik Srinivas
Multi Response Optimization of Friction Stir Lap Welding Process Parameters U...IJERA Editor
This study focuses on the effect of process parameters such as Tool rotational speed, Welding speed and Tool tilt angle in Friction stir Lap welding of dissimilar AA 5083 and AA 6082 alloys. Experiments are designed with three different levels of process parameters using Taguchi orthogonal array. As per DOE, experiments are conducted using Taper threaded cylindrical tool which is made up of with H13 tool steel, on Aluminium plates of 3mm thickness. The Tensile shear test specimens are tested at room temperature in order to analyze the mechanical properties. Vicker’s hardness is also conducted to check the hardness of welded zone. Multi response characteristics include hardness, shear strength, elongation percentage and peak load are optimized using a multi criteria decision making approach. The optimum values are found at tool rotational speed of 710 rpm, welding speed of 1.5 mm/min and tool tilt angle of 1 degree.
Predicting the Nonlinear Material Behaviour under Monotonic and Cyclic loadin...IJERA Editor
Nonlinearity naturally arises in a true, rigorous mathematical formulation of physical problems. One of the most
common nonlinearity is the material nonlinearity where the stress-strain response behaves nonlinearly. The main
objective of this paper is to predict the material nonlinearity with the use of constitutive material model. To this
end, the specimen is modeled with the eight nodded solid elements. One end of the specimen is fixed while the
prescribed displacement is specified at the other end. The Chaboche model parameters are fitted first by
matching the experimental stress-strain curve [4] with the finite element simulations. After that the response of
the specimen is predicted when subjected to different displacement amplitudes i.e. completely reversed loading,
cyclic tension loading and fluctuating ramp loading
Design and analysis of Stress on Thick Walled Cylinder with and with out HolesIJERA Editor
The conventional elastic analysis of thick walled cylinders to final radial & hoop stresses is applicable for the internal pressures up to yield strength of material. The stress is directly proportional to strain up to yield point Beyond elastic point, particularly in thick walled cylinders. The operating pressures are reduced or the material properties are strengthened. There is no such existing theory for the stress distributions around radial holes under impact of varying internal pressure. Present work puts thrust on this area and relation between pressure and stress distribution is plotted graphically based on observations. Here focus is on pure mechanical analysis & hence thermal, effects are not considered. The thick walled cylinders with a radial cross-hole ANSYS Macro program employed to evaluate the fatigue life of vessel. Stresses that remain in material even after removing applied loads are known as residual stresses. These stresses occur only when material begins to yield plastically. Residual stresses can be present in any mechanical structure because of many causes. Residual stresses may be due to the technological process used to make the component. Manufacturing processes lead to plastic deformation. Elasto plastic analysis with bilinear kinematic hardening material is performed to know the effect of hole sizes. It is observed that there are several factors which influence stress intensity factors. The Finite element analysis is conducted using commercial solvers ANSYS & CATIA. Theoretical formulae based results are obtained from MATLAB programs. The results are presented in form of graphs and tables.
Hyperelastic material models in finite element analysis of polymersKartik Srinivas
This paper describes the Hyperelastic material models and strain energy functions used in the finite element analysis (FEA) of polymers. Material characterization testing
Uniaxial tension test is used to determine yield strength, Young’s modulus, Poisson’s ratio, true stress-strain. Finite element analysis, Kartik Srinivas
Multi Response Optimization of Friction Stir Lap Welding Process Parameters U...IJERA Editor
This study focuses on the effect of process parameters such as Tool rotational speed, Welding speed and Tool tilt angle in Friction stir Lap welding of dissimilar AA 5083 and AA 6082 alloys. Experiments are designed with three different levels of process parameters using Taguchi orthogonal array. As per DOE, experiments are conducted using Taper threaded cylindrical tool which is made up of with H13 tool steel, on Aluminium plates of 3mm thickness. The Tensile shear test specimens are tested at room temperature in order to analyze the mechanical properties. Vicker’s hardness is also conducted to check the hardness of welded zone. Multi response characteristics include hardness, shear strength, elongation percentage and peak load are optimized using a multi criteria decision making approach. The optimum values are found at tool rotational speed of 710 rpm, welding speed of 1.5 mm/min and tool tilt angle of 1 degree.
Predicting the Nonlinear Material Behaviour under Monotonic and Cyclic loadin...IJERA Editor
Nonlinearity naturally arises in a true, rigorous mathematical formulation of physical problems. One of the most
common nonlinearity is the material nonlinearity where the stress-strain response behaves nonlinearly. The main
objective of this paper is to predict the material nonlinearity with the use of constitutive material model. To this
end, the specimen is modeled with the eight nodded solid elements. One end of the specimen is fixed while the
prescribed displacement is specified at the other end. The Chaboche model parameters are fitted first by
matching the experimental stress-strain curve [4] with the finite element simulations. After that the response of
the specimen is predicted when subjected to different displacement amplitudes i.e. completely reversed loading,
cyclic tension loading and fluctuating ramp loading
Design and analysis of Stress on Thick Walled Cylinder with and with out HolesIJERA Editor
The conventional elastic analysis of thick walled cylinders to final radial & hoop stresses is applicable for the internal pressures up to yield strength of material. The stress is directly proportional to strain up to yield point Beyond elastic point, particularly in thick walled cylinders. The operating pressures are reduced or the material properties are strengthened. There is no such existing theory for the stress distributions around radial holes under impact of varying internal pressure. Present work puts thrust on this area and relation between pressure and stress distribution is plotted graphically based on observations. Here focus is on pure mechanical analysis & hence thermal, effects are not considered. The thick walled cylinders with a radial cross-hole ANSYS Macro program employed to evaluate the fatigue life of vessel. Stresses that remain in material even after removing applied loads are known as residual stresses. These stresses occur only when material begins to yield plastically. Residual stresses can be present in any mechanical structure because of many causes. Residual stresses may be due to the technological process used to make the component. Manufacturing processes lead to plastic deformation. Elasto plastic analysis with bilinear kinematic hardening material is performed to know the effect of hole sizes. It is observed that there are several factors which influence stress intensity factors. The Finite element analysis is conducted using commercial solvers ANSYS & CATIA. Theoretical formulae based results are obtained from MATLAB programs. The results are presented in form of graphs and tables.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
This paper addresses the fracture toughness ( ), or also known as critical stress intensity Factor, according to
conditions of Lineal Elastic Fracture Mechanics (LEFM). The characterization of the mechanical properties in
tensile and fracture toughness of structural steel pipes API-5L used in hydrocarbons transportation was
performed. For fracture toughness, the material was tested through fatigue crack propagation on standardized
compact specimen (CT) according to ASTM E-399 norm. A thickness (B) equal to and a crack size (a) equal
to 0.5w were used. With the porpoise of establishing the adequate conditions at the crack tip, the specimens were
subjected to fatigue pre-cracking by application of repeated cycles of load in tensile-tensile and constant load
amplitude with a load ratio of R = 0.1. The experimental Compliance method was used based on data obtained
from load vs. Crack Mouth Opening Displacement (CMOD). The results show a Stress Intensity factor of 35.88
MPa√m for a 25 mm crack size specimen. The device used for testing is a MTS-810 machine with capacity of
100KN and 6 kHz sampling rate, which meets the conditions of the ASTM E-399 standard. The cracking
susceptibility of steel is influenced by the size, morphology and distribution of non-metallic inclusions,
thermochemical interaction with the environment and microstructure.
Numerical modeling of the welding defect influence on fatigue life of the wel...inventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Probabilistic Design of Hollow Circular Composite Structure by using Finite E...IJERA Editor
This study represents simulation of hollow circular composite beam by using Monte Carlo method .A three
dimensional static analysis of large displacement type has been carried out. Finite element analysis of hollow
circular composite structure has been carried out and uncertainty in bending stress is analyzed. Bending stress
was objective function. Beam length, beam radius, elastic modulus, shear modulus and Poisson ratio of epoxy
graphite, ply angles of hollow circular section, radius and force are randomly varied within effective range and
their effect on bending stress has been analyzed. In order to validate the results, one loop of simulation is
benchmarked from results in literature. Ultimately, best set of probabilistic design variable is proposed to reduce
bending stress under static loading condition.
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Stu...CrimsonPublishersRDMS
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Study on the Uniqueness of Inverse Solutions by Fabian Pöhl* in Crimson Publishers: Peer Reviewed Material Science Journals
Analysis residual stress e distortions in t joint fillet welds-tso liang teng...ags1963
T-joint ®llet welds are extensively used in ship engineering and bridge structures. Localized heating from the welding process
and subsequent rapid cooling induce tensile residual stress near the toe of the T-joint in ®llet welds.
Determination of Significant Process Parameter in Metal Inert Gas Welding of ...IJERA Editor
The aim of present study is to determine the most significant input parameter such as welding current, arc
voltage and root gap during the Metal Inert Gas Welding (MIG) of Mild Steel 1018 grade by Analysis of
Variance (ANOVA). The hardness and tensile strength of weld specimen are investigated in this study. The
selected three input parameters were varied at three levels. On the analogy, nine experiments were performed
based on L9 orthogonal array of Taguchi’s methodology, which consist three input parameters. Root gap has
greatest effect on tensile strength followed by welding current and arc voltage. Arc voltage has greatest effect on
hardness followed by root gap and welding current. Weld metal consists of fine grains of ferrite and pearlite.
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.
Experimental Investigation and Analysis of Extrusion of Lead from Round Secti...IOSR Journals
Abstract : An experimental investigation has been done on the changes of die angle, area reduction in dies,
loading rate on the final extruded products, extrusion pressures of lead of circular cross sections of different
length. The proposed method is successfully adapted to the extrusion of the equilateral triangular section from
round billet through converging dies of different area reductions. Computation of extrusion pressure at various
area reductions and finite element analysis of different parameters (stress, strain, velocity) both in dry and wet
condition.
Keywords - Converging dies, Extrusion of the equilateral triangular section, Extrusion Pressure
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
This paper addresses the fracture toughness ( ), or also known as critical stress intensity Factor, according to
conditions of Lineal Elastic Fracture Mechanics (LEFM). The characterization of the mechanical properties in
tensile and fracture toughness of structural steel pipes API-5L used in hydrocarbons transportation was
performed. For fracture toughness, the material was tested through fatigue crack propagation on standardized
compact specimen (CT) according to ASTM E-399 norm. A thickness (B) equal to and a crack size (a) equal
to 0.5w were used. With the porpoise of establishing the adequate conditions at the crack tip, the specimens were
subjected to fatigue pre-cracking by application of repeated cycles of load in tensile-tensile and constant load
amplitude with a load ratio of R = 0.1. The experimental Compliance method was used based on data obtained
from load vs. Crack Mouth Opening Displacement (CMOD). The results show a Stress Intensity factor of 35.88
MPa√m for a 25 mm crack size specimen. The device used for testing is a MTS-810 machine with capacity of
100KN and 6 kHz sampling rate, which meets the conditions of the ASTM E-399 standard. The cracking
susceptibility of steel is influenced by the size, morphology and distribution of non-metallic inclusions,
thermochemical interaction with the environment and microstructure.
Numerical modeling of the welding defect influence on fatigue life of the wel...inventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Probabilistic Design of Hollow Circular Composite Structure by using Finite E...IJERA Editor
This study represents simulation of hollow circular composite beam by using Monte Carlo method .A three
dimensional static analysis of large displacement type has been carried out. Finite element analysis of hollow
circular composite structure has been carried out and uncertainty in bending stress is analyzed. Bending stress
was objective function. Beam length, beam radius, elastic modulus, shear modulus and Poisson ratio of epoxy
graphite, ply angles of hollow circular section, radius and force are randomly varied within effective range and
their effect on bending stress has been analyzed. In order to validate the results, one loop of simulation is
benchmarked from results in literature. Ultimately, best set of probabilistic design variable is proposed to reduce
bending stress under static loading condition.
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Stu...CrimsonPublishersRDMS
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Study on the Uniqueness of Inverse Solutions by Fabian Pöhl* in Crimson Publishers: Peer Reviewed Material Science Journals
Analysis residual stress e distortions in t joint fillet welds-tso liang teng...ags1963
T-joint ®llet welds are extensively used in ship engineering and bridge structures. Localized heating from the welding process
and subsequent rapid cooling induce tensile residual stress near the toe of the T-joint in ®llet welds.
Determination of Significant Process Parameter in Metal Inert Gas Welding of ...IJERA Editor
The aim of present study is to determine the most significant input parameter such as welding current, arc
voltage and root gap during the Metal Inert Gas Welding (MIG) of Mild Steel 1018 grade by Analysis of
Variance (ANOVA). The hardness and tensile strength of weld specimen are investigated in this study. The
selected three input parameters were varied at three levels. On the analogy, nine experiments were performed
based on L9 orthogonal array of Taguchi’s methodology, which consist three input parameters. Root gap has
greatest effect on tensile strength followed by welding current and arc voltage. Arc voltage has greatest effect on
hardness followed by root gap and welding current. Weld metal consists of fine grains of ferrite and pearlite.
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.
Experimental Investigation and Analysis of Extrusion of Lead from Round Secti...IOSR Journals
Abstract : An experimental investigation has been done on the changes of die angle, area reduction in dies,
loading rate on the final extruded products, extrusion pressures of lead of circular cross sections of different
length. The proposed method is successfully adapted to the extrusion of the equilateral triangular section from
round billet through converging dies of different area reductions. Computation of extrusion pressure at various
area reductions and finite element analysis of different parameters (stress, strain, velocity) both in dry and wet
condition.
Keywords - Converging dies, Extrusion of the equilateral triangular section, Extrusion Pressure
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
One of the primary needs for socio-economic development in any nation in the world is the provision of reliable electricity supply systems with lower carbon footprint levels. The purpose of this work is the development of a hybrid Power system that harnesses the renewable energy in sun and electricity to generate electricity. The working model can able to run on dual mode- solar and electricity. It can also be driven independently either by solar or electricity. The battery can be charge from solar panel (40W) or by power supply. The household single phase A.C. power supply of 230V is converted into 12V D.C. using step down transformer and rectifying circuit. The working model can achieve energy saving, low carbon emission, environmental protection for the upcoming future of human life.
UART Serial Communication Module Design and Simulation Based on VHDLIJERA Editor
UART (Universal Asynchronous Receiver Transmitter) is a kind of serial communication protocol; mostly used for short-distance, low speed, low-cost data exchange between computer and peripherals. During the actual industrial production, sometimes we do not need the full functionality of UART, but simply integrate its core part. UART includes three kernel modules which are the baud rate generator, receiver and transmitter. The UART implemented with VHDL language and simulated using XILINX ISE12.1 to achieve compact, stable and reliable data transmission. It’s significant for the design of SOC. The simulation results are completely consistent.
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.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Structural and Electrical Analysis of Various MOSFET DesignsIJERA Editor
Invention of Transistor is the foundation of electronics industry. Metal Oxide Semiconductor Field Effect Transistor (MOSFET) has been the key to the development of nano electronics technology. This paper offers a brief review of some of the most popular MOSFET structure designs. The scaling down of planar bulk MOSFET proposed by the Moore’s Law has been saturated due to short channel effects and DIBL. Due to this alternative approaches has been considered to overcome the problems at lower node technology. SOI and FinFET technologies are promising candidates in this area.
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.
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.
Effect of V Notch Shape on Fatigue Life in Steel Beam Made of High Carbon St...IJMER
The present work includes study effect of V notch shape with various angle orientation and
depths on fatigue life behavior in steel beam made of High Carbon Steel alloy AISI 1078 which has a wide
application in industry. Fatigue life of notched specimens is calculated using the fatigue life obtained from
the experiments for smooth specimens (reference) and by use Numerical method (FEA).The fatigue
experiments were carried out at room temperature, applying a fully reversed cyclic load with the
frequency of 50 Hz and mean stress equal to zero (R= -1), on a cantilever rotating-bending fatigue testing
machine. The stress ratio was kept constant throughout the experiment. Different instruments have been
used in this investigation like Chemical composition analyzer , Tensile universal testing machine
,Hardness tester , Fatigue testing machine and Scanning Electron Microscope (SEM).The results show
that there is acceptable error between experimental and numerical works
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
In this paper we have analyzed the stress distribution over a rectangular specimen
with hybrid composite material at its central hole. Using Vacuum bag technique the
material has been fabricated and it consists of carbon and glass fiber with epoxy. The
cross ply lamina arrangement with alternate carbon and glass has increased the
strength of the structure. This is because carbon properties are high compared to
glass. The cutouts made in typical aircraft and automobile components reduce the
weight and bulking load carrying capacity of the aircraft according to the weight
reduction law. Three specimens were used to carry out experimental investigations as
per ASTM D5766 in the universal testing machine. We have analyzed and compared
the results of the stress concentration in the rectangular specimen with a hole using
FEA
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.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Comparative Study on Anchorage in Reinforced Concrete Using Codes of Practice...IJERA Editor
This paper (Part II) reports a comparative study for BS8110 and EC2 of practice and those expressions by Batayneh and Neilsen on tests from literature. These have been treated under straight bar anchorages with transverse pressure. The aim of this study is to evaluate the reliability of the existing equations for bond strength of straight bars by applying to the available tests in the literature .The most important parameters were examined in these tests are concrete strength, anchorage length, concrete covers, bar diameter and transverse pressure. 264 tests from the literature have been chosen, which are all for straight bars with transverse pressure. The specimens are pull-out specimens with small concrete covers, beams ends and slabs. For both comparative studies in Part I and Part II, the conclusions and recommendations are presented here together.
OPTIMIZATION AND FATIGUE ANALYSISOF A CRANE HOOK USING FINITE ELEMENT METHODijmech
Stress analysis plays an important role in the design of structures like crane hook under loading conditions.
Crane hook is a reliable lifting component being used in industries. Structure failure of crane hook occurs
because of the stress induced due to repetitive loading and unloading conditions. In this study, solid
modeling of crane hook having trapezoidal cross-section referring to one of its existing design is done
using SOLIDWORKS. Further, analyses are carried out in ANSYS Workbench and nCode DesignLife. The
lengths of two parallel sides of the cross-section of crane hook are varied and different candidates are
obtained for loading capacity of 30 ton on the basis of Mass, total Displacement and Von-Mises stress.This
is done to reduce weight and balance economy. Further, out of these candidates, best candidates are
considered and fatigue analysis is performed on these candidates.
Determination of Stress Concentration factor in Linearly Elastic Structures w...IJERA Editor
Stress concentration is the localization of stress around stress raisers. Sudden changes in the geometry of
structures give rise to stress values that are higher than those obtained by elementary equations of solid
mechanics. Therefore the evaluation of stress state at such locations needs specialized techniques such as Finite
Element Method (FEM).The finite element method is a numerical procedure that can be used to obtain solution
to a large variety of engineering problems such as structural, thermal, heat transfer, electromagnetism and fluid
flow.
In the present investigation, focus has been kept on the finite element modeling and determination of stress
concentration factor (SCF) in linearly elastic structures with different stress-raisers such as circular and elliptical
holes and double semicircular notch at different locations in a finite plate. The results obtained from FEM are
compared with those obtained by analytical relations as given in literature. A commercially available finite
element solver ANSYS has been used for the modeling and analysis in the investigation. Throughout the
investigation, plane82, which is an eight node two-dimensional element is used for the discretization.
ELASTO-PLASTIC ANALYSIS OF A HEAVY DUTY PRESS USING F.E.M AND NEUBER’S APPR...IAEME Publication
Heavy duty presses are subjected to extreme load conditions especially during operations like bending, shearing, drawing etc. It generates very high stresses in the punch and die of the press tool. As a sequel to this, failure of the press tool occurs, sometimes prematurely. Hence estimation of the stresses under severe load conditions is of paramount importance.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
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.
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.
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.
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.
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Experimental and numerical analysis of elasto-plastic behaviour of notched specimen to tensile and compressive cyclic loading
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Experimental and numerical analysis of elasto-plastic
behaviour of notched specimen to tensile and compressive
cyclic loading
Ganga Reddy C* Dr. Shantharaja M**
*(Department of Mechanical Engineering, UVCE, Bangalore University, Bangalore-560001)
** (Department of Mechanical Engineering, UVCE, Bangalore University, Bangalore-560001)
ABSTRACT
The objective of the work was to estimate the elasto-plastic stress and strain behaviour at the root of the notch of
an Al 6061 plate undergoing tensile and compressive cyclic loading by both experimental and numerical
methods. This attempt to measured initial elasto-plastic stresses experimentally then verified by numerically.
The various Kt values such as 2, 4 and 6 specimens were subjected to tensile test using a computerised universal
testing machine. Numerical approach associated with body discretization and developed finite element model
with sufficient degree of freedom to analyses elasto-plastic analysis of notched specimen. Experimental results
show that analysis of three Kt notched specimens had similar behaviour of elasto-plastic behaviour but different
magnitude. The experimental results compare well with the numerical results which are obtained during finite
element analysis of notched specimens.
I. Introduction
Recent years many researches [1] worked on
interfacial crack and fracture of machine components.
In other hand many engineering components contain
geometrical discontinuous such as shoulders,
keyways, oil holes and grooves, generally termed
notches [2]. The notches are more prone to local
stress and strain concentration when they are loaded
condition. The stresses around notches are exceeding
their yield limit even for nominal elastic stress [3].
The higher stress and strain concentration at notch
does not impair the strength of the machine part,
which made of a ductile material but the plastic
deformation occur at the notch root. Further the
notched machine part is subjected to cyclic loading
the severity of plastic deformation more effective and
it reduces the life of the components.
The linear rule is based on the assumption that
the strain concentration factor is the same as the
elastic stress concentration factor, Kt. The strain at
notch root is expressed as , where is
plastic strain, Kt is stress concentration and e is
elastic strain. Stephens et al. [4] suggest that this rule
agrees well with measurements in plane strain
situations, such as for circumferential grooves in
shafts in tension or bending. Gowhari-Anaraki and
Hardy [3] compared the calculated strains in hollow
tubes subjected to monotonic and cyclic axial loading
from the linear rule with predictions from finite
element analyses. They predicated elasto-plastic
deformation which was less than 50 % of
experimental values [5].
Stowell [6] and Hardrath et al.[7] developed two
equations to predict the elasto-plastic stress and strain
behaviour at the peak stress of the specimens. The
first of these was developed by Stowell [8] and
modified by Hardrath and Ohman [9-10]. Two
equations are used for predicting stress and strain at
the notch root, elastic stress, stress concentration and
nominal stress. These equations have been altered
slightly for fatigue applications and used to estimate
stress and strain histories at notch roots for cyclic
loading. Although they developed equations
successfully describing cyclic condition at the root of
the notch but as per author knowledge which is not
extended to experimental work. The objective of the
work was to investigate effect of stress concentration
factor on elasto-plastic behaviour of Al6061 ally by
experimental and finite element technique.
II. Experimental study
The experimental work was carried out for
different stress concentration factors such as 1.75,
2.00, 2.25 and 2.50 to study the elasto-plastic
behaviour. The material used was A-6061 aluminium
alloy and the chemical composition is given Table 1.
Table 1. Chemical composition of
aluminium6061 alloy
Mg. Si Fe Cu Al
0.92 0.76 0.28 0.22 Bal.
The specimen dimensions were adopted as per
the standards adopted by Zeng et.al.,[1], for their
RESEARCH ARTICLE OPEN ACCESS
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work on elasto-plastic stress-strain behavior as shown
in Fig. 1 and dimensions are given Table 2.
Table 2 Specimen Dimensions use in experiment
Param
eter
Dimension (in mm)
Kt
1.75 2.00 2.25 2.50
d 9.23 7.10 5.25 3.50
h 4.00 4.00 4.00 4.00
L 60.32 60.32 60.32 60.32
H 41.28 41.28 41.28 41.28
r 11.11 11.11 11.11 11.11
The specimens with different notch radii were
then fabricated from a larger sheet of Al 6061 by
wire cutting method. The wire cut method was used
as it gave a very accurate dimensional tolerance. A
Universal Testing Machine (UTM) was used to
perform tensile testing of the fabricated specimens.
The specimens with different stress concentration
factors were subjected to tensile load till fracture. The
resultant broken specimens was subjected to fracture
analysis using Scanning Electron Microscope (SEM)
analysis.
As the specimen had a smooth surface, it had to
be roughened at the ends, so that it could be held in
the grippers effectively without slipping. A strain
gauge was mounted on the specimen at the vicinity of
the notch root, as the mounting of the strain gauge
exactly at the notch root was difficult, owing to very
small width of the plate and curvature of the notch.
The strain gauge was mounted on the specimen at the
point shown in the Fig. 1.
Fig. 1 Test specimen for elasto-plastic studies
III. Numerical Analysis
For this research work geometrical models of
different stress concentration factors were created
using ANSYS as a platform. The models have
varying notch radius (r), such that Kt values obtained
were 1.75, 2, 2.25 and 2.50. The thickness of the
specimen was fixed at 4mm so as to prevent buckling
of the specimen under tensile and compressive
loading. SOLID186 element was selected for
analysis of notch root, which exhibits quadratic
displacement behaviour as shown in Fig. 2. The
element is defined by 20 nodes having three degrees
of freedom per node: translations in the nodal x, y,
and z directions. The element supports plasticity,
hyper-elasticity, creep, stress stiffening, large
deflection, and large strain capabilities. The meshing
and constraints of tensile specimen is shown in Fig. 2
Fig. 2 FE Model for elasto-plastic studies
IV. Results and Discussion
4.1 Numerical results
The stress and strain values obtained at the notch
root by numerical analysis, is plotted for all the four
Kt values as shown in Fig. 3 (a-d). The stress strain
variations obtained for the specimens conform to the
standard stress strain variation of the Al6061 alloy
material. As discussed in the previous chapter, the
complete cycle was divided into 40 load steps. The
corresponding stress and strain values are tabulated
for each specimen.
The stress – strain values obtained from non - linear
Finite Element Analysis (FEA) are plotted for each of
the specimen bearing different Kt values as shown in
Fig. 3(a).
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Fig. 3 Hysteresis plot for different Kt a) 1.75,
b)2.00, c)2.25 and 2.5
For Kt = 1.75, it can be inferred from the Fig
3(a) that for the maximum tensile loading of 26.5kN ,
the corresponding maximum stress and maximum
strain values are 289.12 MPa and 0.023256
respectively. For the maximum compressive loading
of 26.5kN, the corresponding maximum stress and
maximum strain values are 287.60 MPa and 0.02182
respectively.
For Kt = 2.00, it can be inferred from the Fig
3(b) that for the maximum tensile loading of 26.5kN,
the corresponding maximum stress and maximum
strain values are 293.47 MPa and 0.019289
respectively. For the maximum compressive loading
of 26.5kN, the corresponding maximum stress and
maximum strain values are 292.50 MPa and
0.018704 respectively.
For Kt = 2.25, it can be inferred from the Fig
3(c) that for the maximum tensile loading of 26.5kN ,
the corresponding maximum stress and maximum
strain values are 300.86 MPa and 0.017479
respectively. For the maximum compressive loading
of 26.5kN, the corresponding maximum stress and
maximum strain values are 301.04 MPa and
0.017131 respectively.
For Kt = 2.5, it can be inferred from the Fig. 3(d)
that for the maximum tensile loading of 26.5kN , the
corresponding maximum stress and maximum strain
values are 310.85 MPa and 0.016219 respectively.
For the maximum compressive loading of 26.5 kN,
the corresponding maximum stress and maximum
strain values were 312.86 MPa and 0.015866
respectively.
From the plots obtained from the numerical
analysis, it can be inferred that the stress at a given
load point increases with increase in stress
concentration factor. This is illustrated by the
variation of maximum notch stress corresponding to
load of 26.4kN with Kt as shown in the Fig.4.
Fig. 4 Variation of maximum notch stress with Kt
The maximum notch stress for specimens with
Kt 1.75, 2.00, 2.25 and 2.50 were found to be 293
MPa, 296 Mpa, 302 Mpa and 312 Mpa respectively.
4.2 Correlation of Numerical analysis and
Experimental testing for tensile loading
The difference between mean of ANSYS and
experimental values is - 0.000751 and the percentage
error is – 8.07%. The difference between the median
of ANSYS and experimental values is - 0.001281 and
the percentage error is -17.164%. The percentage
error in standard deviation is -3.037%.
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Fig 5 : Experiment and numerical tensile results
a) Kt = 1.75, b) Kt=2.00, c) Kt=2.25 and d) Kt= 2.5
respectively
Fig. 5 (a) shows the difference between mean of
ANSYS and experimental values is -0.000292 and
the percentage error is -3.57%. The difference
between the median of ANSYS and experimental
values is -0.00129 and the percentage error is -
18.41%.
Fig. 5 (b) shows the difference between mean of
ANSYS and experimental values is -0.000292 and
the percentage error is -3.57%. The difference
between the median of ANSYS and experimental
values is -0.00129 and the percentage error is -
18.41%.
Fig. 5 (c) shows the difference between mean of
ANSYS and experimental values is 0.000087 and the
percentage error is 1.108%. The difference between
the median of ANSYS and experimental values is -
0.000151 and the percentage error is -2.185%.
Fig. 5 (d) shows the difference between mean of
ANSYS and experimental values is 0.00135 and the
percentage error is 18.02%. The difference between
the median of ANSYS and experimental values is
0.00192 and the percentage error is 28.486%.
4.3 Fracture surface studies
The SEM analysis done on the specimen with Kt = 0
and notch radius 0 mm reveals the fracture type. The
fracture occurs in a more ductile compared to other
specimens with Kt values 2.50, 2.25, 2 and 1.75.
This is shown by the absence of smooth surfaces and
presence of dull intergranular surface and boundaries.
The presence of more prominent dimples and rough
surface reveals ductile nature of the fracture. The
figure obtained from SEM at magnification 550X is
shown by the Fig. 6 (a).
Fig 6 : Fracture surface of a) Kt=0, b) Kt = 1.75, c)
Kt=2.00, d) Kt=2.25 and e) Kt= 2.5 respectively
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The SEM analysis done on the specimen with Kt
= 1.75 and notch radius 9.23mm reveals the fracture
type. The fracture occurs in a relatively more ductile
way than the specimens with Kt values 2.50, 2 and
1.75. This is shown by the absence of smooth
surfaces and presence of dull intergranular surface
and boundaries. The presence of more prominent
dimples and rough surface reveals ductile nature of
the fracture. The figure obtained from SEM at
magnification 550X is shown by the Fig. 6(b).
The SEM analysis done on the specimen with Kt
= 2 and notch radius 7.1mm reveals the fracture type.
The fracture occurs in a ductile way than the
specimens with different Kt values 2.25 and 2.50.
This is shown by the presence of smooth surfaces and
presence of bright and dull inter-granular boundaries.
The presence of dimples, rough surfaces show that
it’s a characteristic feature of ductile fracture relative
to the specimens with Kt values 2.50 and 2.25. The
figure obtained from SEM at magnification 550X is
shown by the Fig. 6(c)
The SEM analysis done on the specimen with Kt
= 2.25 and notch radius 5.25mm reveals the fracture
type. The fracture occurs in a relatively less brittle
way than the specimens with different Kt values 2
and 1.75. This is shown by the presence of smooth
surfaces and presence of bright intergranular
boundaries. The figure obtained from SEM at
magnification 550X is shown by the Fig. 6(d)
The SEM analysis done on the specimen with
Kt=2.5 and notch radius 3.5mm reveals the fracture
type. The fracture occurs in a relatively more brittle
way than other specimens with different Kt values
and notch radius. This is shown by the presence of
smooth surfaces and presence of bright intergranular
boundaries. The figure obtained from SEM at
magnification 550X is shown by the Fig. 6(e)
V. Conclusion
The notch stresses, on application of maximum
load, computed for Kt 1.75, 2, 2.25, 2.5 are 289 MPa,
294 MPa, 301 MPa, 311 MPa respectively, which
shows that as Kt increases from 1.75 to 2.5 in steps of
0.25, the notch root stress for the same load increases
by approximately 2%. Also the notch strain obtained
at maximum load decreases by 15% with the increase
in Kt.
The standard deviation between the experimental
testing and numerical analysis for the Kt values 1.75,
2, 2.25 and 2.5 obtained are 0.0071, 0.00597,
0.00575 and 0.00542 respectively. From these values
it is evident that the deviation between the
experimental results and numerical results is
consistent. The t-scores obtained for Kt 1.75, 2, 2.25
and 2.5 are 0.236, 0.109, - 0.034 and -0.557
respectively. The t-probability values obtained from
the t-scores and the degrees of freedom are 0.8158,
0.9140, 0.9734 and 0.5842 for Kt 1.75, 2, 2.25 and
2.5 respectively. This is shown from the fractography
analysis of the SEM images of the fractured surface
at the notch root. From the images it is evident that
the nature of fracture is more brittle as Kt increases.
References
[1] Glinka G., “Energy density approach to
calculation of inelastic strain–stress near
notches and cracks”, Engineering Fracture
Mechanics, 1985, pp. 485–508.
[2] Z Zeng “Elasto-plastic stress and strain
behaviour at notch roots under monotonic
and cyclic loadings”, 10 January 2001, pp.
287-300.
[3] Gowhari-Anaraki, A. R. and Hardy, S. J.
“Low cycle fatigue life predictions for
hollow tubes with axially loaded axi-
symmetric internal projections”, 1991,
pp.133–146.
[4] Stephens, R. I. Fatemi, A. Stephens, R. R.
and Fuchs, H. O.,“ Metal Fatigue in
Engineering”, 2nd edition, (John Wiley,
New York) 2000, pp. 2-20.
[5] John H. Crews, Jr“ Elastoplastic stress-
strain behaviour at notch roots in sheet
specimens under constant-amplitude
loading”, NASA TECHNICAL NOTE,
NASA TN D-5253, June 1969, pp. 4-32
[6] Stowell, Elbridge Z., “Stress and Strain
Concentration at a Circular Hole in an
Infinite Plate”, NACA TN 2073, 1950, pp.
18-51
[7] Hardrath, Herbert F. and Ohman Lachlan,
“A Study of Elastic and Plastic Stress
Concentration Factors Due to Notches and
Fillets in Flat Plates”, NACA Rep. 1117,
1953. (Supersedes NACA TN 2566), pp. 5-
16.
[8] Stowell, Elbridge Z., “Stress and Strain
Concentration at a Circular Hole in an
Infinite Plate”, NACA TN 2073, 1950, pp.
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[9] Sharpe Jr, W. N. ASME 1993 “Nadai
lecture—elastic plastic stress and strain
concentrations”, Trans. ASME, J. Engng
Mater. Technol., 1995, pp. 1–7.
[10] John H. Crews, Jr “Elasto-plastic stress-
strain behaviour at notch roots in sheet
specimens under constant-amplitude
loading”, NASA TECHNICAL NOTE,
NASA TN D-5253, June 1969, pp. 4-32