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Introduction |
12 |
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Thermo-Mechanical Basics |
19 |
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Kinematic Equations |
19 |
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Coordinates and Displacements in Reference Systems |
20 |
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Deformation Gradients and Displacement Gradients |
25 |
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Strain Measures |
28 |
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Material and Spatial Time Derivatives of Deformations |
36 |
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Strain Rate Tensors |
39 |
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Compatibility Conditions |
43 |
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Stress Measures |
44 |
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Cauchy Stresses |
44 |
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Alternative Stress Measures |
46 |
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Rate Dependent Stress Measures |
47 |
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Descriptions of Static Equilibrium |
50 |
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Direct Formulation of Equilibrium |
50 |
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Calculus of Variations |
51 |
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Equilibrium Formulated as Variational Problem |
57 |
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Conservation Equations |
59 |
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Four Ways of Describing Conservation |
59 |
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Conservation of Mass |
61 |
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Conservation of Momentum |
62 |
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Conservation of Energy |
64 |
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Compressed Formulation of the Conservation Equations |
65 |
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Variational Solutions of the Balance Equations |
66 |
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What are Weak Forms? |
67 |
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Weak Forms of the Equation of Motion |
68 |
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Hamilton's Principle of Least Action |
70 |
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Thermodynamic Basics |
71 |
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Energy Is Conserved - The First Law |
71 |
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Entropy Increases - The Second Law |
72 |
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Thermodynamic Potentials |
74 |
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Formulations of the Clausius-Duhem Inequality |
76 |
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Consequences for Constitutive Equations |
77 |
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Constitutive Equations |
80 |
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Equations of State |
81 |
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Axiomatic Equations of State |
82 |
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Empirical Equations of State |
84 |
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Constitutive Equations for Total Stresses |
85 |
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Cauchy Elasticity |
86 |
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General Elastic Anisotropy |
87 |
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Elasticity with Symmetry Planes |
88 |
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Green Elasticity - Hyperelastic Behavior |
92 |
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Some Examples of Hyperelastic Formulations |
96 |
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Constitutive Equations for Inelastic Deformations |
107 |
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Basic Terminology in Plasticity Theory |
108 |
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Selected Yield Criteria |
113 |
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Flow Rules |
121 |
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Strain Rate Dependent Yield Criteria |
123 |
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Plasticity Effects at Shock Compression States |
127 |
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Meso-Mechanical Calculation of Yield Loci |
129 |
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Polymers - Nonlinear Elasticity, Initial Plastic Softening, Visco-Plastic Hardening |
132 |
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Shock Waves and Related Equations of State |
153 |
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Elastic Wave Propagation in Solids |
153 |
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Wave Equation and Sound Speeds |
154 |
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Solution to the One-Dimensional Wave Equation |
156 |
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Shock Wave Formation |
158 |
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Shock Wave Propagation in Solids |
161 |
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Conditions for Shock Waves - Phenomenological Aspects |
161 |
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Shock Front Dimensions |
165 |
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Thermo-Mechanics of Shock Waves |
166 |
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Dispersion - Precondition for Shock Wave Evolution and Stability |
166 |
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Thermodynamic Conditions upon Shock Wave Transit |
168 |
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Riemann Problem and Rankine-Hugoniot Equations |
169 |
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Hugoniot Curves and vS-v1 Relations |
173 |
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Energy Dissipation upon Shock Wave Transition |
177 |
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Nonlinear Equations of State for Shock Waves |
179 |
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Grüneisen Theory for Crystalline Oscillators |
180 |
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Equations of State for High-Pressure and High-Energy Regimes |
181 |
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Nonlinear Equations of State for Anisotropic Materials |
199 |
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Discussion of Nonlinear Equations of State for Shock Waves |
211 |
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Summary of Shock Thermodynamics |
211 |
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Influence of Nonlinear EOS Formulations on the Calculated Sound Speed |
215 |
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Hydrocodes |
222 |
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Modelling of Dynamic Deformation Processes |
222 |
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Components of a Hydrocode |
224 |
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Marching Solutions in Time Steps |
225 |
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Classification of Partial Differential Equations |
225 |
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Discretization - The Basic Idea |
234 |
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Finite Difference Methods |
236 |
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Time Integration with Finite Difference Schemes |
239 |
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Explicit or Implicit Time Integration Schemes? |
244 |
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Finite Volume Method |
246 |
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Basic Concept of Finite Volume Methods |
246 |
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Finite Element Method |
250 |
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Solutions of the Euler-Lagrange Equation |
251 |
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Ritz Version of Finite Elements |
253 |
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Finite Elements for Dynamic Problems |
256 |
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Shape Functions |
258 |
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Stiffness Matrices, Mass Matrices and Numerical Solution |
267 |
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Shell Elements |
270 |
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Finite Element Methodologies for Discontinuities |
274 |
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Meshfree Methods |
278 |
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Motivation to Develop Meshfree Methods |
278 |
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Evolution and Maturing of Meshfree Methods |
281 |
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Smoothed Particle Hydrodynamics |
282 |
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Coupling and Adaptive Change of Discretizations |
302 |
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Meshfree - Finite Element Coupling |
302 |
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Coupling of Static and Dynamic Solvers |
310 |
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Shock Wave Simulation with Hydrocodes |
310 |
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Artificial Viscosity |
312 |
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Air Blast Effects on Structures |
317 |
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Failure Models for Dynamic Loading Conditions |
322 |
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Continuum Damage Mechanics |
324 |
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Effective Stress and Strain Equivalence Concepts |
324 |
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Degradation and Damage Accumulation Functions |
327 |
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Isotropic Failure Models |
329 |
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Maximum Stress or Strain Criteria |
329 |
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Gurson Micro-mechanical Model for Ductile Fracture |
331 |
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Phenomenological Stress Triaxiality Dependent Failure Models |
332 |
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Brittle Failure |
336 |
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Spallation Modelling |
339 |
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Failure Models for Composites |
342 |
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Analytical Models for Intra-Laminar Failure |
344 |
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Continuum Damage Based Intra-Laminar Failure Models |
351 |
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Delamination models |
355 |
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Discretization Aspects of Composite Failure |
357 |
|
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Aspects of Advanced Dynamic Material Testing |
360 |
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Objectivity of Material Parameter Derivation |
360 |
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|
Material Characterization in the Low Dynamic Regime |
361 |
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Uniaxial Tension to Failure with Optical Strain Measurement |
362 |
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|
Shear Failure Characterization |
363 |
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Material Tests at Moderate Dynamic Strain Rates |
367 |
|
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Hopkinson-Bar Facilities |
367 |
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Direct-Impact Test for Low-Impedance Materials |
369 |
|
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Material Characterization at Extreme Strain Rates |
372 |
|
|
Taylor Anvil-Test |
372 |
|
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Flyer-Plate Experiments |
376 |
|
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Edge-On Impact Test |
384 |
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References |
387 |
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Index |
411 |
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