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Computational Welding Mechanics: Thermomechanical and Microstructural Simulations [Kõva köide]

Edited by (Woodhead Publishing, Abington, Cambridge, United Kingdom)
  • Formaat: Hardback, 231 pages, kõrgus x laius: 229x152 mm, kaal: 522 g
  • Ilmumisaeg: 01-Oct-2007
  • Kirjastus: CRC Press Inc
  • ISBN-10: 1420063375
  • ISBN-13: 9781420063370
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Computational Welding Mechanics: Thermomechanical and Microstructural SimulationsSuurem pilt
  • Formaat: Hardback, 231 pages, kõrgus x laius: 229x152 mm, kaal: 522 g
  • Ilmumisaeg: 01-Oct-2007
  • Kirjastus: CRC Press Inc
  • ISBN-10: 1420063375
  • ISBN-13: 9781420063370
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9781420063370.html
Computational Welding Mechanics (CWM) provides an important technique for modeling 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 modeling 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 modeling 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 optimization. Some of the numerical methods described in the book are illustrated using software available form the author that allows you to explore CWM in more depth.

Computational Welding Mechanics will be a standard work for welding engineers and all those researching welding processes and wider thermomechanical and microstructural phenomena in metals.
Foreword ix
Preface xi
CWM_Lab software xiii
1 Introduction 1
1.1 Computational welding mechanics
1
1.2 Contents of the book
2
1.3 The competent company
2
1.4 Driving forces for increased use of welding simulations
4
2 The multi-physics of welding
6
3 Couplings and reference frames
9
3.1 Coupled systems and solution procedures
9
3.2 Linearised coupled thermoelasticity
12
3.3 Decoupling of the subdomains of welding simulations
22
4 Thermomechanics of welding
31
4.1 The thermal cycle and microstructure evolution
31
4.2 The Satoh test
37
4.3 Welding of plate
40
4.4 Welding of pipe
45
5 Nonlinear heat flow
47
5.1 Basic equations of nonlinear heat conduction
47
5.2 Finite element formulation of nonlinear heat conduction
49
6 Nonlinear deformation
54
6.1 Basic choices in formulation of nonlinear deformation
55
6.2 Finite element formulation of nonlinear deformation
58
6.3 Constitutive model
62
6.4 Stress updating algorithm for deviatoric plasticity
74
7 Numerical methods and modelling for efficient simulations
80
7.1 Element technologies
80
7.2 Meshing
81
7.3 Dynamic and adaptive meshing
84
7.4 Substructuring
86
7.5 Parallel computing
90
7.6 Dimensional reduction
90
7.7 Weld pass reduction
95
7.8 Replacement of weld by simplified loads
97
8 Calibration and validation strategy
99
8.1 Definitions of concepts used
99
8.2 Code verification
102
8.3 Model refinement and qualification
103
8.4 General approach for validation
104
8.5 Calibration and validation strategy
107
8.6 Validation using subsystems and complete systems
117
9 Modelling options in computational welding mechanics (CWM)
119
9.1 A note about computability in CWM
119
9.2 The importance of material modelling
119
9.3 Effect of temperature and microstructure
121
9.4 Density
126
9.5 Thermal properties
126
9.6 Elastic properties
129
9.7 Plastic properties and models
130
9.8 Thermomechanical properties
139
9.9 Microstructure evolution
139
9.10 Material modelling in the weld pool
150
9.11 Surface properties
150
9.12 Heat input models
151
9.13 Geometric models
163
10 Modelling strategy 164
10.1 Accuracy and weld flexibility categories for CWM models
165
10.2 Characteristics of different accuracy categories
168
10.3 Motivation for proposed modelling strategy
171
11 Robustness and stability 175
11.1 Definitions concerned with robustness and stability
175
11.2 Perturbation methods for investigation of robustness
180
11.3 Methods for analysis of stability
181
11.4 Application of robustness and stability analysis in CWM
183
12 The current state of computational welding mechanics (CWM) 184
12.1 Heat input models
184
12.2 Material models
184
12.3 Models for fatigue and cracking
186
12.4 Computational efficiency
186
12.5 Simplified methods
186
12.6 Reducing risk for buckling, deformations or residual stresses
187
12.7 Improved life
187
12.8 Repair welding
187
12.9 Optimisation
188
12.10 Simulation of welding and other manufacturing steps
189
13 The Volvo Aero story in computational welding mechanics (CWM) 190
H RUNNEMALM and H ALBERG, Volvo Aero Corporation, Sweden
13.1 History of CWM at Volvo Aero Corporation
190
13.2 Strategic decisions for successful implementation
190
13.3 Business motivation for CWM
191
13.4 Examples
193
14 Summary and conclusion 197
15 References 198
Index 223


Woodhead Publishing, Abington, Cambridge, United Kingdom