Description
Book SynopsisAn updated and expanded edition of the popular guide to basic continuum mechanics and computational techniques
This updated third edition of the popular reference covers state-of-the-art computational techniques for basic continuum mechanics modeling of both small and large deformations. Approaches to developing complex models are described in detail, and numerous examples are presented demonstrating how computational algorithms can be developed using basic continuum mechanics approaches.
The integration of geometry and analysis for the study of the motion and behaviors of materials under varying conditions is an increasingly popular approach in continuum mechanics, and absolute nodal coordinate formulation (ANCF) is rapidly emerging as the best way to achieve that integration. At the same time, simulation software is undergoing significant changes which will lead to the seamless fusion of CAD, finite element, and multibody system computer codes in one computat
Table of Contents
PREFACE ix
1 INTRODUCTION 1
1.1 Matrices / 2
1.2 Vectors / 6
1.3 Summation Convention / 11
1.4 Cartesian Tensors / 12
1.5 Polar Decomposition Theorem / 21
1.6 D’Alembert’s Principle / 23
1.7 Virtual Work Principle / 29
1.8 Approximation Methods / 32
1.9 Discrete Equations / 34
1.10 Momentum, Work, and Energy / 37
1.11 Parameter Change and Coordinate Transformation / 39
Problems / 43
2 KINEMATICS 47
2.1 Motion Description / 48
2.2 Strain Components / 55
2.3 Other Deformation Measures / 60
2.4 Decomposition of Displacement / 62
2.5 Velocity and Acceleration / 64
2.6 Coordinate Transformation / 68
2.7 Objectivity / 74
2.8 Change of Volume and Area / 77
2.9 Continuity Equation / 81
2.10 Reynolds’ Transport Theorem / 82
2.11 Examples of Deformation / 84
2.12 Important Geometry Concepts / 92
Problems / 94
3 FORCES AND STRESSES 97
3.1 Equilibrium of Forces / 97
3.2 Transformation of Stresses / 100
3.3 Equations of Equilibrium / 100
3.4 Symmetry of the cauchy Stress Tensor / 102
3.5 Virtual Work of the Forces / 103
3.6 Deviatoric Stresses / 113
3.7 Stress Objectivity / 115
3.8 Energy Balance / 119
Problems / 120
4 CONSTITUTIVE EQUATIONS 123
4.1 Generalized Hooke’s Law / 124
4.2 Anisotropic Linearly Elastic Materials / 126
4.3 Material Symmetry / 127
4.4 Homogeneous Isotropic Material / 129
4.5 Principal Strain Invariants / 136
4.6 Special Material Models for Large Deformations / 137
4.7 Linear Viscoelasticity / 141
4.8 Nonlinear Viscoelasticity / 155
4.9 A Simple Viscoelastic Model for Isotropic Materials / 161
4.10 Fluid Constitutive Equations / 162
4.11 Navier–Stokes Equations / 164
Problems / 164
5 FINITE ELEMENT FORMULATION: LARGE-DEFORMATION, LARGE-ROTATION PROBLEM 167
5.1 Displacement Field / 169
5.2 Element Connectivity / 176
5.3 Inertia and Elastic Forces / 178
5.4 Equations of Motion / 180
5.5 Numerical Evaluation of The Elastic Forces / 188
5.6 Finite Elements and Geometry / 193
5.7 Two-Dimensional Euler–Bernoulli Beam Element / 199
5.8 Two-Dimensional Shear Deformable Beam Element / 203
5.9 Three-Dimensional Cable Element / 205
5.10 Three-Dimensional Beam Element / 206
5.11 Thin-Plate Element / 208
5.12 Higher-Order Plate Element / 210
5.13 Brick Element / 211
5.14 Element Performance / 212
5.15 Other Finite Element Formulations / 216
5.16 Updated Lagrangian and Eulerian Formulations / 218
5.17 Concluding Remarks / 221
Problems / 223
6 FINITE ELEMENT FORMULATION: SMALL-DEFORMATION, LARGE-ROTATION PROBLEM 225
6.1 Background / 226
6.2 Rotation and Angular Velocity / 229
6.3 Floating Frame of Reference (FFR) / 234
6.4 Intermediate Element Coordinate System / 236
6.5 Connectivity and Reference Conditions / 238
6.6 Kinematic Equations / 243
6.7 Formulation of The Inertia Forces / 245
6.8 Elastic Forces / 248
6.9 Equations of Motion / 250
6.10 Coordinate Reduction / 251
6.11 Integration of Finite Element and Multibody System Algorithms / 253
Problems / 258
7 COMPUTATIONAL GEOMETRY AND FINITE ELEMENT ANALYSIS 261
7.1 Geometry and Finite Element Method / 262
7.2 ANCF Geometry / 264
7.3 Bezier Geometry / 266
7.4 B-Spline Curve Representation / 267
7.5 Conversion of B-Spline Geometry to ANCF Geometry / 271
7.6 ANCF and B-Spline Surfaces / 273
7.7 Structural and Nonstructural Discontinuities / 275
8 PLASTICITY FORMULATIONS 279
8.1 One-Dimensional Problem / 281
8.2 Loading and Unloading Conditions / 282
8.3 Solution of the Plasticity Equations / 283
8.4 Generalization of The Plasticity Theory: Small Strains / 291
8.5 J2 Flow Theory with Isotropic/Kinematic Hardening / 298
8.6 Nonlinear Formulation for Hyperelastic–Plastic Materials / 312
8.7 Hyperelastic–Plastic J2 FLOW THEORY / 322
Problems / 326
REFERENCES 329
INDEX 339
