Computational Welding Mechanics

Cover -- Table of Contents -- Chapter I: Introduction -- 1.1 Introduction and Synopsis -- 1.2 Brief history of computational welding mechanics -- 1.3 Mechanical behavior of welds -- 1.4 Major objective of this book -- 1.5 References -- Chapter II: Computer Simulation of Welding Processes -- 2.1 Introduction and Synopsis -- 2.2 The Computing Environment -- 2.2.1 Computational Geometry -- 2.2.2 Models for Welding Heat Sources -- Theoretical Formulations -- Model Considerations -- Gaussian Surface Flux Distribution -- Hemi-spherical Power Density Distribution -- Ellipsoidal Power Density Distribution -- Double Ellipsoidal Power Density Distribution -- 2.2.3 Kinematic Models for Welding Heat Transfer -- 2.2.4 Evaluation of the Double Ellipsoid Model -- 2.2.5 Modeling Thermal Stresses and Distortions in Welds -- 2.2.6 Microstructure Modeling in Heat Affected Zone (HAZ) -- 2.2.7 Spatial Integration Schemes -- 2.3 References -- Chapter III: Thermal Analysis of Welds -- 3.1 Introduction and Synopsis -- 3.2 Heat Transfer Theory -- 3.3 Weld Heat Source -- 3.3.1 Data to characterize a Weld Heat Source -- 3.3.2 Modeling a Weld Heat Source -- First Generation Weld Heat Source Models -- Second Generation Weld Heat Source Models -- Distributed Heat Source Models -- Prescribed Temperature Heat Source Models -- Third Generation Weld Heat Source Models -- Fourth Generation Weld Heat Source Models -- Fifth Generation Weld Heat Source Model -- Hierarchical Weld Process Models -- 3.4 Heat Transfer in Welds -- 3.4.1 Power Input -- 3.4.2 Implementation of prescribed temperature model -- 3.4.3 Starting Transient -- 3.4.4 Boundary Conditions -- 3.4.5 Finite Element Solutions with Prescribed Temperature -- 3.4.6 Computational Results -- Complex Weld Pool Shape -- Welds with Filler Metal Addition -- 3.5 References -- Chapter IV: Evolution of Microstructure Depending On Temperature -- 4.1 Introduction and Synopsis -- 4.2 Microstructure Model -- 4.2.1 Data Structures -- Flow lines -- Functionality of the Data Structure -- Layered tree description -- Locating elements -- Creatingflow lines -- 4.2.2 Test Problems and Results -- Steady State Temperature Field -- Clipped transient temperature field -- 4.3 Hardness Calculation of the HAZ -- 4.4 References -- Chapter V: Evolution of Microstructure Depending On Deformations -- 5.1 Introduction and Synopsis -- 5.2 Properties for Modeling -- 5.2.1 Stresses, Strains and Deformations -- 5.2.2 Rate Independent Isotropic Plasticity -- Steady-State Formulation -- Deformation -- Strain Increment Measurement -- Numerical Results -- 5.2.3 Linear Viscous Isotropic Plasticity around melting point -- 5.2.4 Rate dependent isotropic plasticity (General case) -- 5.2.5 Changing Constitutive Equations in Time and Space -- 5.2.6 Numerical Experiments and Results.