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The document summarizes several studies on simulating friction stir welding and processing using meshfree methods like smoothed particle hydrodynamics (SPH). It discusses how Pan et al. used SPH to model each particle as a representative volume element and coupled it with crystal plasticity modeling. It also summarizes studies by Ansari et al. on modeling the plunging phase and how rotational speed affects stresses and strains, and Xiao et al.'s modified SPH model to simulate heat transfer. Material models used for aluminum alloys in the simulations are also outlined.
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Meshfree simulation of friction stir welding process
The document discusses modeling friction stir welding and processing using smoothed particle hydrodynamics (SPH). SPH is a Lagrangian meshfree method that can simulate the large plastic deformation and material mixing of friction stir processes. Prior research has used SPH to study temperature distribution, grain size evolution, microhardness, and texture development during welding. The document outlines the governing equations of SPH and highlights several studies that have modeled friction stir welding and processing using this approach.
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Experimental Investigation and Analysis of Extrusion of Lead from Round Secti...
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
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Keywords - Converging dies, Extrusion of the equilateral triangular section, Extrusion Pressure
Gw3412651271
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
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Meshfree simulation of friction stir welding process
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2) The simulations investigate the effects of shear friction factor, die entry radius, die height, and die short-axis length on thickness distribution, stress, strain, and damage within the formed product.
3) The results confirm the suitability of using the DEFORMTM 3D finite element software to model superplastic blow-forming of Ti-6Al-4V titanium alloy.
Experimental Investigation and Analysis of Extrusion of Lead from Round Secti...
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
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International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
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innovative technique that the FSPwas employed to modify the surface layer of aluminium alloy. The FSP passes
of only two passes were applied on aluminium alloy samples. A rotating tool with a pin and shoulder is inserted
into a single piece of material and results in significant microstructural changes in the processed zone, due to
intense plastic deformation. It has been proved to be an effective way to refine the microstructure of aluminium
alloys, and thereby improve the mechanical properties. In procedural phenomenon there are different parameters
adjustment have been worked out to refine microstructure and several properties characterised to TEM, SEM,
FESEM and mechanical properties. In this study, a refined energy based model that estimates the energy
generated due to friction and plastic deformation is presented with the help ofexperimental and theoretical
results available in many literatures. The model is applied to 7xxx series of aluminium alloys.
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Friction stir processing (FSP) is a promising solid state surface modification technique. Also, considered as an
innovative technique that the FSPwas employed to modify the surface layer of aluminium alloy. The FSP passes
of only two passes were applied on aluminium alloy samples. A rotating tool with a pin and shoulder is inserted
into a single piece of material and results in significant microstructural changes in the processed zone, due to
intense plastic deformation. It has been proved to be an effective way to refine the microstructure of aluminium
alloys, and thereby improve the mechanical properties. In procedural phenomenon there are different parameters
adjustment have been worked out to refine microstructure and several properties characterised to TEM, SEM,
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generated due to friction and plastic deformation is presented with the help ofexperimental and theoretical
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rates in the composite cylinder were investigated. The stresses in the cylinder did not have significant variation
with varying size and content of the reinforcement, and operating temperature. However, the tangential as well
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Triaxial compaction provides improved green density and strength over other compaction methods like unidirectional pressing and isostatic pressing. Applying both axial pressure and confining pressure during triaxial compaction allows independent control of stresses and improves density uniformity. Higher confining pressures and shear stresses lead to higher green densities and strengths for powder compacts.
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International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
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ESTIMATION OF CREEP PARAMETERS IN AN ISOTROPIC UNIFORM COMPOSITE CYLINDER
In applications such as pressure vessel for industr ial gases or a media transportation of high- pressurized fluids and piping of nuclear reactors,the cylinder has to operate under severe mechanical and thermal loads,causing significant c reep hence reduced service life (Gupta and Phatak,2001;Tachibana and Iyoku,2004;Hagihara a nd Miyazaki,2008). As an example,in the high temperature engineering test reactor,the temp erature reaches of the order of 900 oC (Tachibana and Iyoku,2004). The piping of reactor cooling system are subjected to high temperature and pressure and may be damaged due to high heat generated from the reactor core (Hagihara and Miyazaki,2008). A number of studies pertaining to creep behaviour of the cylinder assume the cylinder to be made of monolith ic material. However,under severe thermo mechanical loads cylinder made of monolithic materi als may not perform well. The weight reduction achieved in engineering components,resul ting from the use of aluminum/aluminum base alloys,is expected to save power and fuel due to a reduction in the payload of dynamic systems. However,the enhanced creep of aluminum an d its alloys may be a big hindrance in such applications. Aluminum matrix composites offer a unique combination of properties,unlike many monolithic materials like metals and alloys,w hich can be tailored by modifying the content of reinforcement.
SPH3.pptx
This document summarizes the capabilities of smoothed particle hydrodynamics (SPH) simulation for modeling friction stir welding and processing. SPH uses a kernel function and smoothing length to approximate field variables at particles from neighboring particle contributions. It discretizes the material into separate particle sets and approximates continuous fields at the particles. SPH allows determination of temperature evolution, deformation, defect formation, residual stresses, and material flow within a single model during large plastic deformation and mixing common to friction stir welding/processing.
SPH2
This document discusses solving the incompressible Navier-Stokes equation using smooth particle hydrodynamics for modeling friction stir welding and processing. It covers using smooth particle hydrodynamics to solve the incompressible Navier-Stokes equation for a single particle, including terms for velocity, gravity, velocity gradient, and convective acceleration.
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into a single piece of material and results in significant microstructural changes in the processed zone, due to
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Extrusion is a manufacturing process used to create objects of a fixed cross-sectional profile. A material is pushed through a die of the desired cross-section. A brief and concise review of the contributions made by the previous researchers in the area of extrusion process has been presented. Steel material and aluminium alloys are mostly used by researchers as die and billet material in extrusion process. FEM modeling of extrusion process is carried out by employing axisymmetric conditions in most cases. Meshing of the work piece is generally done by using axisymmetric quadrilateral elements. Experimental set-up and tools utilized in formation of extrusion process are presented and discussed. FEM results are presented in terms of variation of punch stroke, punch force.
980563
This research article analyzes the static response of functionally graded material (FGM) plates under transverse loads for varying aspect ratios. FGM plates are modeled with power law, sigmoid law, and exponential distributions for the volume fraction. Finite element analysis is performed in ANSYS to model FGM plates with 16 layers. Parameters such as volume fraction distribution and aspect ratio are varied. The FGM plate is subjected to uniform and point loads, and the response is analyzed. Results provide insight into how the varying material properties of FGMs impact their structural response under different loading and geometric conditions.
Contact Stress Analysis of Stainless Steel Spur Gears using Finite Element An...
Gears or toothed wheels form a positive drive for power transmission system in precision machines wherein a definite velocity ratio is needed. Despite having high cost, complicated manufacturing, need of precise alignment of shafts and lubrication, the gear drives are preferred over other power transmission drives. One of the important reasons of preference being that of efficiency which is very high in gear drives, even upto 99 per cent in case of spur gears. Spur gears are the simplest of the gear drives having teeth cut parallel to the axis of the shaft. Herein, we report the contact stress analysis of Stainless Steel spur gears by theoretical method using Hertz equations and by Finite Element Analysis using FEA software ANSYS 14.0 Workbench. The spur gear is sketched and modelled in ANSYS Design Modeller and the contact stress analysis is done in Mechanical ANSYS Multiphysics. When compared, the results of both theoretical method and FEA show a good degree of agreement with each other.
Experimental and numerical analysis of expanded pipe using rigid conical shap...
The experimental and numerical analysis was performed on pipes suffering large plastic deformation through expanding them using rigid conical shaped mandrels, with three different
cone angles (15◦, 25◦, 35◦) and diameters (15, 17, 20) mm. The experimental test for the strain results investigated the expanded areas. A numerical solution of the pipes expansion process was
also investigated using the commercial finite element software ANSYS. The strains were
measured for each case experimentally by stamping the mesh on the pipe after expanding, then compared with Ansys results. No cracks were generated during the process with the selected
angles. It can be concluded that the strain decreased with greater angles of conical shape and an increase in expansion ratio results in an increase of expansion force and a decrease in the pipe thickness and length resulting in pipe thinning and shortening. Good agreement is evident between experimental and ANSYS results within discrepancy (16.90017%) in the X direction and (27.68698%) in the Y direction. Also, the stress distribution is investigated and it can be concluded that the case of Diameter (Do cone) = 35mm and (A) = α = 15° is the optimum.K
Structural Changes in the Surface Layer of Deep Rolled Samples Due to Thermal...
Deep rolling processes initiate plastic deformations in the surface layer. The local characteristics of deformation are dependent on the induced stress expressed by the local stress tensor. Equivalent stresses above yield strength cause plastic deformation. Additionally the intrinsic energy, e. g. the dislocation density, is enhanced and the residual stress state is changed. The effects to a deep rolled surface from an increase in temperature are mainly dependent on the material, the microstructure, the initial residual stress state, the inclusion density, the distribution of soluted alloying elements and the plastic deformation. In the described experiments the interactions between deformation and temperature of the steel grade AISI 4140 (42 CrMo 4) used for all further experiments in a transregional Collaborative Research Center (CRC) were to be examined. The most simple investigation methods were chosen deliberately to allow a better statistical support of correlations between introduced strains and material reactions for a wide variation of process parameters. Since the visual effects by light microscopy in AISI 4140 were very small, the experiments were repeated with german grade 18 CrNiMo 7-6 (comparable to AISI 4820). This paper focuses on the micro structural changes in defined deep rolled surface regions due to an increase in temperature. The work described is part of the Collaborative Research Center “Process Signatures”, collaboration between Bremen University, Technical University Aachen, Germany and Oklahoma State University Stillwater, USA.
TRANSIENT ANALYSIS OF PIEZOLAMINATED COMPOSITE PLATES USING HSDT
Piezoelectric materials have excellent sensing and actuating capabilities have made them the most practical smart materials to integrate with laminated structures. Integrated structure system can be called a smart structure because of its ability to perform self-diagnosis and quick adaption to environment changes. An analytical procedure has been developed in the work based on higher order shear deformation theory subjected to electromechanical loading for investigating transient characteristics of smart material plates. For analysis two displacement models are to be considered i.e., model-1 accounts for strain in thickness direction is zero whereas in model-2 in-plane displacements are expanded as cubic functions of the thickness coordinate. Navier’s technique has been adopted for obtaining solutions of anti-symmetric cross–ply and angle-ply laminates of both model-1 and model-2 with simply supported boundary conditions. For obtaining transient response of a laminated composite plate attached with piezoelectric layer Newmark’s method has been used. Effect of thickness coordinate of composite laminated plates attached with piezoelectric layer subjected to electromechanical loadings is studied.
B05520913
The document compares residual stress in equal matching and undermatching weld joints of high strength steel thick plates through numerical simulation. The simulation found that equivalent stress and longitudinal stress were significantly lower in undermatching welds compared to equal matching welds, while transverse stresses were similar. Stress maximums in equal matching welds occurred in both the weld and heat affected zone, while undermatching welds only showed stress maximums in the heat affected zone. The undermatching weld configuration is an effective way to reduce residual stress and avoid cold cracking in high strength steel thick plate welding.
REVIEW ON ANALYSIS OF CREEP IN AN ISOTROPIC UNIFORM COMPOSITE CYLINDER
The steady state creep in Al- SiCP composite cylinder subjected to internal pressure was investigated. The creep
behavior of the material was described by threshold stress based creep law by assuming a stress exponent of 5.
The effect of size and content of the reinforcement (SiCP), and operating temperature on the stresses and strain
rates in the composite cylinder were investigated. The stresses in the cylinder did not have significant variation
with varying size and content of the reinforcement, and operating temperature. However, the tangential as well
as radial strain rates in the cylinder could be reduced to a significant extent by decreasing size of SiCP,
increasing the content of SiCP and decreasing operating temperature.
1 s2.0-s0263823121003-mai
This document presents a non-polynomial framework for analyzing the bending behavior of multi-scale hybrid laminated nanocomposite (MHLNC) reinforced circular and annular plates under different boundary conditions and external pressures. The key points are:
- A state-space based differential quadrature method is used to examine the bending of MHLNC reinforced circular/annular plates considering various boundary conditions.
- Halpin-Tsai equations and fiber micromechanics are used to predict the effective material properties of the multi-scale composite at different hierarchical levels.
- A parametric study is conducted to analyze the effects of laminate stacking, plate type, and pressure type on the bending characteristics and stress-strain response
Dr.R.Narayanasamy - Power Point on Powder Compaction
Triaxial compaction provides improved green density and strength over other compaction methods like unidirectional pressing and isostatic pressing. Applying both axial pressure and confining pressure during triaxial compaction allows independent control of stresses and improves density uniformity. Higher confining pressures and shear stresses lead to higher green densities and strengths for powder compacts.
I021201059069
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
IRJET-Analysis of Functionally Graded Thick Walled Truncated Cone Pressure Ve...
This document analyzes the stresses in thick-walled truncated conical pressure vessels made of functionally graded materials (FGM) using finite element analysis in ANSYS. It first provides background on FGMs and discusses previous analytical research on stresses in cylindrical and spherical pressure vessels with exponentially varying material properties. It then outlines the problem formulation, modeling of material properties, geometry, and finite elements in ANSYS. Validation of the finite element model is discussed. The goal is to determine how non-homogeneous, exponentially varying material properties in FGM pressure vessels impact induced stresses compared to homogeneous materials.
ESTIMATION OF CREEP PARAMETERS IN AN ISOTROPIC UNIFORM COMPOSITE CYLINDER
In applications such as pressure vessel for industr ial gases or a media transportation of high- pressurized fluids and piping of nuclear reactors,the cylinder has to operate under severe mechanical and thermal loads,causing significant c reep hence reduced service life (Gupta and Phatak,2001;Tachibana and Iyoku,2004;Hagihara a nd Miyazaki,2008). As an example,in the high temperature engineering test reactor,the temp erature reaches of the order of 900 oC (Tachibana and Iyoku,2004). The piping of reactor cooling system are subjected to high temperature and pressure and may be damaged due to high heat generated from the reactor core (Hagihara and Miyazaki,2008). A number of studies pertaining to creep behaviour of the cylinder assume the cylinder to be made of monolith ic material. However,under severe thermo mechanical loads cylinder made of monolithic materi als may not perform well. The weight reduction achieved in engineering components,resul ting from the use of aluminum/aluminum base alloys,is expected to save power and fuel due to a reduction in the payload of dynamic systems. However,the enhanced creep of aluminum an d its alloys may be a big hindrance in such applications. Aluminum matrix composites offer a unique combination of properties,unlike many monolithic materials like metals and alloys,w hich can be tailored by modifying the content of reinforcement.
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SPH3.pptx
This document summarizes the capabilities of smoothed particle hydrodynamics (SPH) simulation for modeling friction stir welding and processing. SPH uses a kernel function and smoothing length to approximate field variables at particles from neighboring particle contributions. It discretizes the material into separate particle sets and approximates continuous fields at the particles. SPH allows determination of temperature evolution, deformation, defect formation, residual stresses, and material flow within a single model during large plastic deformation and mixing common to friction stir welding/processing.
SPH2
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The document discusses the meshfree simulation of friction stir welding and processing. It provides background on friction stir welding, noting that as the tool rotates and traverses, severely plasticized material migrates from the retreating to advancing side and deposits in the tool's wake. It then discusses friction stir processing, where an FSW tool is used to modify the microstructure of the material by creating fine microstructures, homogenizing the microstructure to improve properties, and introducing particles to develop composites. Finally, it summarizes a study that used smoothed particle hydrodynamics to model FSW and examine temperature, grain size, microhardness, and texture evolution, finding finer grain size on the retreating side and that high translational and
MARTENSITIC_TRANSFORMATION
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3. Glissile dislocations are necessary for the transformation, as they allow for shape changes by diffusing one part of the crystal into another without requiring diffusion.
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SPH4.pptx
- 1. The Meshfree Simulation of Friction Stir Welding/Processing Part4
- 2. • Pan et al. (2013) considered each SPH particle to represent a polycrystalline representative volume element (RVE), and we assume a weak coupling between the SPH simulations and crystal plasticity modeling. • Particle velocities obtained from the SPH solution at each time step are used to calculate the plastic velocity gradient for the polycrystalline deformation behavior. Texture evolution is then computed using crystal plasticity modeling Conti.. TMAZ particle pole Fig. W. Pan et al. / International Journal of Plasticity 48 (2013) Simulation of texture evolution
- 3. Literature Ansari et al. (2019) studied the plunging phase friction stir welding of Al 6082 alloy using SPH modeling with different rotational speed and plunging phase and studied the stress and strain distribution near tool pin The force and tarque from simulation were compared with experimental and the results were in close agreement. They studied the effect of tool rotational speed on the force field, stress, and equivalent plastic strain at different tool depth in the plunging stage. Increasing the plunge depth, the stress, strain, and force field is increased. Furthermore, increasing rotational speed from 600 to 1200 rpm, stress, and equivalent plastic strain increased by about 3% and 19%, respectively, while the force decreased by 22%.
- 4. Xiao et al. (2016) studied the heat transfer during friction stir welding using a modified SPH model heat source model based on sticking friction is implemented to describe the heat generation of FSW
- 5. Simulation of FSP Tool Backing Plate Locking Strips A, B, n, C and m are the five material constants JC Parameter A (MPa) B (MPa) C n m 324 114 0.002 0.42 1.34 Shear Modulus (GPa) Density (Kg/m3) (Al-6061T6) Cut-off Pressure (MPa) 27.6 2700 1200 Johnson-Cook material model Constitutive Equation Al Plate Gruneisen EOS Units 0 2700 Kg/m3 C 5328 m/s 0 1.97 - S1 1.4 - a 0.48 - Al-6061T6 Thermal Parameters Cv k Values 875 175 Units J/KgK W/mK
Editor's Notes
- Good afternoon, ladies and gentleman My name is min-seong kim in sunchon national university. Today, my presentation topic is the effect of anisotropy in Mg alloys on bendability under the mini-V-bending test