Thermo Mechanical Analysis Of Welding Processes

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Theory of Thermomechanical Processes in Welding

Author : Andrzej Sluzalec
Publisher : Springer Science & Business Media
ISBN 13 : 1402029918
Total Pages : 173 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Theory of Thermomechanical Processes in Welding by : Andrzej Sluzalec

Download or read book Theory of Thermomechanical Processes in Welding written by Andrzej Sluzalec and published by Springer Science & Business Media. This book was released on 2005-12-05 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this book is to provide a unified and systematic continuum approach to engineers and applied physicists working on models of deformable welding material. The key concept is to consider the welding material as an thennodynamic system. Significant achievements include thermodynamics, plasticity, fluid flow and numerical methods. Having chosen point of view, this work does not intend to reunite all the information on the welding thermomechanics. The attention is focused on the deformation of welding material and its coupling with thermal effects. Welding is the process where the interrelation of temperature and deformation appears throughout the influence of thermal field on material properties and modification of the extent of plastic zones. Thermal effects can be studied with coupled or uncoupled theories of thermomechanical response. A majority of welding problems can be satisfactorily studied within an uncoupled theory. In such an approach the temperature enters the stress-strain relation through the thennal dilatation and influences the material constants. The heat conduction equation and the relations governing the stress field are considered separately. In welding a material is either in solid or in solid and liquid states. The flow of metal and solidification phenomena make the welding process very complex. The automobile, aircraft, nuclear and ship industries are experiencing a rapidly-growing need for tools to handle welding problems. The effective solutions of complex problems in welding became possible in the last two decades, because of the vigorous development of numerical methods for thermal and mechanical analysis.

Thermo-mechanical analysis of welding processes

Author : Narges Dialami
Publisher :
ISBN 13 :
Total Pages : 155 pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Thermo-mechanical analysis of welding processes by : Narges Dialami

Download or read book Thermo-mechanical analysis of welding processes written by Narges Dialami and published by . This book was released on 2014 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with the numerical simulation of welding processes. The analysis is focused either at global level, considering the full component to be jointed, or locally, studying more in detail the heat affected zone (HAZ). Even if most of the considerations are quite general, two specific welding technologies are studied in depth: multi-pass arc welding and its extension to Shaped Metal Deposition (SMD) processes (global level analysis) and Friction Stir Welding (FSW) technology (local framework). The analysis at global (structural component) level is performed defining the problem in the Lagrangian setting while, at local level, both Eulerian and Arbitrary Lagrangian Eulerian (ALE) frameworks are used. More specially, to model the FSW process, an apropos kinematic framework which makes use of an efficient combination of Lagrangian (pin), Eulerian (metal sheet) and ALE (stirring zone) descriptions for the different computational sub-domains is introduced for the numerical modeling. As a result, the analysis can deal with complex (non-cylindrical) pin-shapes and the extremely large deformation of the material at the HAZ without requiring any remeshing or remapping tools. A fully coupled thermo-mechanical framework is proposed for the computational modeling of the welding processes proposed both at local and global level. A staggered algorithm based on an isothermal fractional step method is introduced. To account for the isochoric behavior of the material when the temperature range is close to the melting point or due to the predominant deviatoric deformations induced by the visco-plastic response, a mixed finite element technology is introduced. The Variational Multi Scale (VMS) method is used to circumvent the LBB stability condition allowing the use of linear/linear P1/P1 interpolations for displacement (or velocity, ALE/Eulerian formulation) and pressure fields, respectively. The same stabilization strategy is adopted to tackle the instabilities of the temperature field, inherent characteristic of convective dominated problems (thermal analysis in ALE/Eulerian kinematic framework). At global level, the material behavior is characterized by a thermo-elasto-viscoplastic constitutive model. The analysis at local level is characterized by a rigid thermo-visco-plastic constitutive model. Different thermally coupled (non-Newtonian) fluid-like models as Norton-Ho¿ or Sheppard-Wright, among others are tested. The balance of energy equation is solved in its enthalpy format for a treatment of the phase-change phenomena. An accurate definition of the heat source (laser, arc, electron beam, etc), as well as the heat generation induced by the visco-plastic dissipation or the frictional contact (Coulomb and Norton model) are described. An ad-hoc technique to account for the use of a filler material in the shape metal deposition (SMD) process is developed. The element activation methodology proposed allows for an accurate layer-by-layer deposition of the material without introducing spurious stress/strain fields. To better understand the material flow pattern in the stirring zone, a (Lagrangian based) particle tracing is carried out while post-processing FSW results. The final numerical tool developed to study the FSW process is able to give detailed information concerning the characteristics of the weld and their relationship with the welding process parameters (e.g. advancing and rotation velocities). The simulation tool presented in this work is validated with analytical results and calibrated with experimental data. This thesis is a collection of research articles supplemented with some introductory chapters summarizing the state-of-the-art, the motivations and objectives of the work as well as the main contributions and some suggested lines for future work. It comprises 7 already-published (or accepted for publication) peer-review journal articles which are integral part of this work.

Thermo-mechanical Modeling of the Gas-tungsten-arc(GTA) Welding Process

Author : David Bart Duncan
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Thermo-mechanical Modeling of the Gas-tungsten-arc(GTA) Welding Process by : David Bart Duncan

Download or read book Thermo-mechanical Modeling of the Gas-tungsten-arc(GTA) Welding Process written by David Bart Duncan and published by . This book was released on 1979 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Computational Welding Mechanics

Author : Lars-Erik Lindgren
Publisher : Elsevier
ISBN 13 : 1845693558
Total Pages : 246 pages
Book Rating : 4.8/5 (456 download)

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Book Synopsis Computational Welding Mechanics by : Lars-Erik Lindgren

Download or read book Computational Welding Mechanics written by Lars-Erik Lindgren and published by Elsevier. This book was released on 2014-01-23 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational welding mechanics (CWM) provides an important technique for modelling welding processes. Welding simulations are a key tool in improving the design and control of welding processes and the performance of welded components or structures. CWM can be used to model phenomena such as heat generation, thermal stresses and large plastic deformations of components or structures. It also has a wider application in modelling thermomechanical and microstructural phenomena in metals. This important book reviews the principles, methods and applications of CWM.The book begins by discussing the physics of welding before going on to review modelling methods and options as well as validation techniques. It also reviews applications in areas such as fatigue, buckling and deformation, improved service life of components and process optimisation. Some of the numerical methods described in the book are illustrated using software available from the author which allows readers to explore CWM in more depth.Computational welding mechanics is a standard work for welding engineers and all those researching welding processes and wider thermomechanical and microstructural phenomena in metals. - Highlights the principles, methods and applications of CWM - Discusses the physics of welding - Assesses modelling methods and validation techniques

Modeling of Thermo-Electro-Mechanical Manufacturing Processes

Author : C. V. Nielsen
Publisher : Springer Science & Business Media
ISBN 13 : 1447146425
Total Pages : 121 pages
Book Rating : 4.4/5 (471 download)

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Book Synopsis Modeling of Thermo-Electro-Mechanical Manufacturing Processes by : C. V. Nielsen

Download or read book Modeling of Thermo-Electro-Mechanical Manufacturing Processes written by C. V. Nielsen and published by Springer Science & Business Media. This book was released on 2012-10-09 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling of Thermo-Electro-Mechanical Manufacturing Processes with Applications in Metal Forming and Resistance Welding provides readers with a basic understanding of the fundamental ingredients in plasticity, heat transfer and electricity that are necessary to develop and proper utilize computer programs based on the finite element flow formulation. Computer implementation of a wide range of theoretical and numerical subjects related to mesh generation, contact algorithms, elasticity, anisotropic constitutive equations, solution procedures and parallelization of equation solvers is comprehensively described. Illustrated and enriched with selected examples obtained from industrial applications, Modeling of Thermo-Electro-Mechanical Manufacturing Processes with Applications in Metal Forming and Resistance Welding works to diminish the gap between the developers of finite element computer programs and the professional engineers with expertise in industrial joining technologies by metal forming and resistance welding.

Modeling of Thermo-Electro-Mechanical Manufacturing Processes

Author : C. V. Nielsen
Publisher : Springer Science & Business Media
ISBN 13 : 1447146433
Total Pages : 121 pages
Book Rating : 4.4/5 (471 download)

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Book Synopsis Modeling of Thermo-Electro-Mechanical Manufacturing Processes by : C. V. Nielsen

Download or read book Modeling of Thermo-Electro-Mechanical Manufacturing Processes written by C. V. Nielsen and published by Springer Science & Business Media. This book was released on 2012-10-08 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling of Thermo-Electro-Mechanical Manufacturing Processes with Applications in Metal Forming and Resistance Welding provides readers with a basic understanding of the fundamental ingredients in plasticity, heat transfer and electricity that are necessary to develop and proper utilize computer programs based on the finite element flow formulation. Computer implementation of a wide range of theoretical and numerical subjects related to mesh generation, contact algorithms, elasticity, anisotropic constitutive equations, solution procedures and parallelization of equation solvers is comprehensively described. Illustrated and enriched with selected examples obtained from industrial applications, Modeling of Thermo-Electro-Mechanical Manufacturing Processes with Applications in Metal Forming and Resistance Welding works to diminish the gap between the developers of finite element computer programs and the professional engineers with expertise in industrial joining technologies by metal forming and resistance welding.

Thermal Processes in Welding

Author : Victor A. Karkhin
Publisher : Springer
ISBN 13 : 9811359652
Total Pages : 478 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis Thermal Processes in Welding by : Victor A. Karkhin

Download or read book Thermal Processes in Welding written by Victor A. Karkhin and published by Springer. This book was released on 2019-05-15 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes and systemizes analytical and numerical solutions for a broad range of instantaneous and continuous, stationary and moving, concentrated and distributed, 1D, 2D and 3D heat sources in semi-infinite bodies, thick plane layers, thin plates and cylinders under various boundary conditions. The analytical solutions were mainly obtained by the superimposing principle for various parts of the proposed 1D, 2D and 3D heat sources and based on the assumption that only heat conduction plays a major role in the thermal analysis of welds. Other complex effects of heat transfer in weld phenomena are incorporated in the solutions by means of various geometrical and energetic parameters of the heat source. The book is divided into 13 chapters. Chapter 1 briefly reviews various welding processes and the energy characteristics of welding heat sources, while Chapter 2 covers the main thermophysical properties of the most commonly used alloys. Chapter 3 describes the physical fundamentals of heat conduction during welding, and Chapter 4 introduces several useful methods for solving the problem of heat conduction in welding. Chapters 5 and 6 focus on the derivation of analytical solutions for many types of heat sources in semi-infinite bodies, thick plane layers, thin plates and cylinders under various boundary conditions. The heat sources can be instantaneous or continuous, stationary or moving, concentrated or distributed (1D, 2D or 3D). In Chapter 7 the temperature field under programmed heat input (pulsed power sources and weaving sources) is analyzed. In turn, Chapters 8 and 9 cover the thermal cycle, melting and solidification of the base metal. Heating and melting of filler metal are considered in Chapter 10. Chapter 11 addresses the formulation and solution of inverse heat conduction problems using zero-, first- and second-order algorithms, while Chapter 12 focuses on applying the solutions developed here to the optimization of welding conditions. In addition, case studies confirm the usefulness and feasibility of the respective solutions. Lastly, Chapter 13 demonstrates the prediction of local microstructure and mechanical properties of welded joint metals, while taking into account their thermal cycle. The book is intended for all researches, welding engineers, mechanical design engineers, research engineers and postgraduate students who deal with problems such as microstructure modeling of welds, analysis of the mechanical properties of welded metals, weldability, residual stresses and distortions, optimization of welding and allied processes (prewelding heating, cladding, thermal cutting, additive technologies, etc.). It also offers a useful reference guide for software engineers who are interested in writing application software for simulating welding processes, microstructure modeling, residual stress analysis of welds, and for robotic-welding control systems.

Fully Coupled Thermo-mechanical Modelling of a Friction Stir Welding Process Using Finite Elements Analysis

Author :
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (938 download)

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Book Synopsis Fully Coupled Thermo-mechanical Modelling of a Friction Stir Welding Process Using Finite Elements Analysis by :

Download or read book Fully Coupled Thermo-mechanical Modelling of a Friction Stir Welding Process Using Finite Elements Analysis written by and published by . This book was released on 2010 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Friction Stir Welding and Processing

Author : Rajiv S. Mishra
Publisher : ASM International
ISBN 13 : 1615030972
Total Pages : 360 pages
Book Rating : 4.6/5 (15 download)

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Book Synopsis Friction Stir Welding and Processing by : Rajiv S. Mishra

Download or read book Friction Stir Welding and Processing written by Rajiv S. Mishra and published by ASM International. This book was released on 2007-01-01 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the rapidly growing area of friction stir welding. It also addresses the use of the technology for other types of materials processing, including superplastic forming, casting modification, and surface treatments. The book has been prepared to serve as the first general reference on friction stir technology,. Information is provided on tools, machines, process modeling, material flow, microstructural development and properties. Materials addressed include aluminum alloys, titanium alloys, steels, nickel-base alloys, and copper alloys. The chapters have been written by the leading experts in this field, representing leading industrial companies and university and government research insititutions.

Computational Welding Mechanics

Author : John A. Goldak
Publisher : Springer Science & Business Media
ISBN 13 : 0387232885
Total Pages : 326 pages
Book Rating : 4.3/5 (872 download)

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Book Synopsis Computational Welding Mechanics by : John A. Goldak

Download or read book Computational Welding Mechanics written by John A. Goldak and published by Springer Science & Business Media. This book was released on 2006-07-04 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational Welding Mechanics (CWM) provides readers with a complete introduction to the principles and applications of computational welding including coverage of the methods engineers and designers are using in computational welding mechanics to predict distortion and residual stress in welded structures, thereby creating safer, more reliable and lower cost structures. Drawing upon years of practical experience and the study of computational welding mechanics the authors instruct the reader how to: - understand and interpret computer simulation and virtual welding techniques including an in depth analysis of heat flow during welding, microstructure evolution and distortion analysis and fracture of welded structures, - relate CWM to the processes of design, build, inspect, regulate, operate and maintain welded structures, - apply computational welding mechanics to industries such as ship building, natural gas and automobile manufacturing. Ideally suited for practicing engineers and engineering students, Computational Welding Mechanics is a must-have book for understanding welded structures and recent technological advances in welding, and it provides a unified summary of recent research results contributed by other researchers.

Modeling in Welding, Hot Powder Forming, and Casting

Author : Lennart Karlsson
Publisher : ASM International(OH)
ISBN 13 :
Total Pages : 336 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Modeling in Welding, Hot Powder Forming, and Casting by : Lennart Karlsson

Download or read book Modeling in Welding, Hot Powder Forming, and Casting written by Lennart Karlsson and published by ASM International(OH). This book was released on 1997 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference work provides thorough coverage of the theoretical foundations of thermomechanical modeling of welding, hot powder forming, and casting processes, which also can be applied to modeling of the heat treatment and forging of solids. Information on finite element modeling methods will assist design engineers in taking manufacturing processes into consideration to minimize residual stresses and deformation in the design of mechanical components. Contents include: Thermomechanical modeling Thermal modeling of welds Mechanical modeling of welding and residual stresses in welds Metallurgical and mechanical consequences of phase transformations in numerical simulations of welding processes Predicting and measuring methods of two- and three-dimensional residual stresses by using inherent strain as a parameter Hot isostatic pressing Hot powder forging Modeling of heat transfer, fluid flow, and thermodynamics in casting Stresses in castings Thermomechanical modeling in casting with experimental validation.

Friction Welding

Author : Bekir Sami Yilbas
Publisher : Springer Science & Business Media
ISBN 13 : 3642546072
Total Pages : 79 pages
Book Rating : 4.6/5 (425 download)

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Book Synopsis Friction Welding by : Bekir Sami Yilbas

Download or read book Friction Welding written by Bekir Sami Yilbas and published by Springer Science & Business Media. This book was released on 2014-03-14 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides insight into the thermal analysis of friction welding incorporating welding parameters such as external, duration, breaking load, and material properties. The morphological and metallurgical changes associated with the resulting weld sites are analysed using characterization methods such as electron scanning microscope, energy dispersive spectroscopy, X-ray Diffraction, and Nuclear reaction analysis.

Welding Simulations Using ABAQUS

Author : Bahman Meyghani
Publisher : Springer Nature
ISBN 13 : 981191320X
Total Pages : 135 pages
Book Rating : 4.8/5 (119 download)

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Book Synopsis Welding Simulations Using ABAQUS by : Bahman Meyghani

Download or read book Welding Simulations Using ABAQUS written by Bahman Meyghani and published by Springer Nature. This book was released on 2022-03-21 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the use of ABAQUS software in a simplified manner, for use in welding-related issues. Increasing human needs leads to the creation of complicated scientific problems. In the majority of these problems, it is necessary to join different parts and geometries together. Classical methods such as elasticity theory of stress distribution and governing equations of temperature distribution are not appropriate for solving these complicated problems. To overcome these challenges, finite element methods are proposed in order to solve different processes using differential equation. ABAQUS is a user-friendly commercial finite element software for modeling different processes in mechanical, civil, aerospace and other engineering fields. This book contains unified and detailed tutorials for professionals and students who are interested in simulating different welding processes using the ABAQUS finite element software.

Finite Element Analysis of Weld Thermal Cycles Using ANSYS

Author : G. Ravichandran
Publisher : CRC Press
ISBN 13 : 1000165132
Total Pages : 203 pages
Book Rating : 4.0/5 (1 download)

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Book Synopsis Finite Element Analysis of Weld Thermal Cycles Using ANSYS by : G. Ravichandran

Download or read book Finite Element Analysis of Weld Thermal Cycles Using ANSYS written by G. Ravichandran and published by CRC Press. This book was released on 2020-08-06 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite Element Analysis of Weld Thermal Cycles Using ANSYS aims at educating a young researcher on the transient analysis of welding thermal cycles using ANSYS. It essentially deals with the methods of calculation of the arc heat in a welded component when the analysis is simplified into either a cross sectional analysis or an in-plane analysis. The book covers five different cases involving different welding processes, component geometry, size of the element and dissimilar material properties. A detailed step by step calculation is presented followed by APDL program listing and output charts from ANSYS. Features: Provides useful background information on welding processes, thermal cycles and finite element method Presents calculation procedure for determining the arc heat input in a cross sectional analysis and an in-plane analysis Enables visualization of the arc heat in a FEM model for various positions of the arc Discusses analysis of advanced cases like dissimilar welding and circumferential welding Includes step by step procedure for running the analysis with typical input APDL program listing and output charts from ANSYS.

Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments

Author : Paolo Ferro
Publisher : BoD – Books on Demand
ISBN 13 : 178923106X
Total Pages : 164 pages
Book Rating : 4.7/5 (892 download)

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Book Synopsis Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments by : Paolo Ferro

Download or read book Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments written by Paolo Ferro and published by BoD – Books on Demand. This book was released on 2018-05-16 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to quantify residual stresses induced by welding processes through experimentation or numerical simulation has become, today more than ever, of strategic importance in the context of their application to advanced design. This is an ongoing challenge that commenced many years ago. Recent design criteria endeavour to quantify the effect of residual stresses on fatigue strength of welded joints to allow a more efficient use of materials and a greater reliability of welded structures. The aim of the present book is contributing to these aspects of design through a collection of case-studies that illustrate both standard and advanced experimental and numerical methodologies used to assess the residual stress field in welded joints. The work is intended to be of assistance to designers, industrial engineers and academics who want to deepen their knowledge of this challenging topic.

Hybrid Laser-Arc Welding

Author : F O Olsen
Publisher : Elsevier
ISBN 13 : 1845696522
Total Pages : 336 pages
Book Rating : 4.8/5 (456 download)

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Book Synopsis Hybrid Laser-Arc Welding by : F O Olsen

Download or read book Hybrid Laser-Arc Welding written by F O Olsen and published by Elsevier. This book was released on 2009-06-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid laser-arc welding (HLAW) is a combination of laser welding with arc welding that overcomes many of the shortfalls of both processes. This important book gives a comprehensive account of hybrid laser-arc welding technology and applications.The first part of the book reviews the characteristics of the process, including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality. Part two discusses applications of the process to such metals as magnesium alloys, aluminium and steel as well as the use of hybrid laser-arc welding in such sectors as ship building and the automotive industry.With its distinguished editor and international team of contributors, Hybrid laser-arc welding is a valuable source of reference for all those using this important welding technology. - Reviews arc and laser welding including both advantages and disadvantages of the hybrid laser-arc approach - Explores the characteristics of the process including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality - Examines applications of the process including magnesium alloys, aluminium and steel with specific focus on applications in the shipbuilding and automotive industries

Thermal Analysis of Welds

Author : N. T. Nguyen
Publisher : Computational Mechanics
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Thermal Analysis of Welds by : N. T. Nguyen

Download or read book Thermal Analysis of Welds written by N. T. Nguyen and published by Computational Mechanics. This book was released on 2004 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determining the degree of stress in a weld caused by heat at various times in its history plays a significant role in evaluating residual stress and distortion and the microstructure modelling of welded joints and structures, especially in components and structures of ships, aircraft, and bridges. Nguyen, based in Australia, describes various analytical solutions for a number of stationary and moving heat sources in semi-infinite body, thick plate, fillet joint, cylinder, sphere, and cone and their application in weld-pool simulation and other procedures. He accomplishes this by superimposing principles for various parts of the proposed three-dimensional heat sources with an assumption that only conduction is playing a major part in the thermal analysis of welds. The US office of WIT Press is Computational Mechanics. Annotation : 2004 Book News, Inc., Portland, OR (booknews.com).