Extended Finite Element Method for Crack Propagation

Sylvie Pommier, Anthony Gravouil, Nicolas Moes , Alain Combescure

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English

ISTE Ltd and John Wiley & Sons Inc
08 February 2011

Mechanical engineering & materials; Stress & fracture

Novel techniques for modeling 3D cracks and their evolution in solids are presented. Cracks are modeled in terms of signed distance functions (level sets). Stress, strain and displacement field are determined using the extended finite elements method (X-FEM). Non-linear constitutive behavior for the crack tip region are developed within this framework to account for non-linear effect in crack propagation. Applications for static or dynamics case are provided.

By: Sylvie Pommier, Anthony Gravouil, Nicolas Moes, Alain Combescure
Imprint: ISTE Ltd and John Wiley & Sons Inc
Country of Publication: United Kingdom
Dimensions: Height: 241mm, Width: 163mm, Spine: 21mm
Weight: 562g
ISBN: 9781848212091
ISBN 10: 1848212097
Pages: 254
Publication Date: 08 February 2011
Audience: Professional and scholarly , Undergraduate
Format: Hardback
Publisher's Status: Active

Foreword xi Acknowledgements xiii List of Symbols xv Introduction xvii Chapter 1. Elementary Concepts of Fracture Mechanics 1 1.1. Introduction 1 1.2. Superposition principle 3 1.3. Modes of crack straining 4 1.4. Singular fields at cracking point 5 1.5. Crack propagation criteria 10 Chapter 2. Representation of Fixed and Moving Discontinuities 21 2.1. Geometric representation of a crack: a scale problem 22 2.2. Crack representation by level sets 29 2.3. Simulation of the geometric propagation of a crack 52 2.4. Prospects of the geometric representation of cracks 66 Chapter 3. Extended Finite Element Method X-FEM 69 3.1. Introduction 69 3.2. Going back to discretization methods 70 3.3. X-FEM discontinuity modeling 79 3.4. Technical and mathematical aspects 94 3.5. Evaluation of the stress intensity factors 98 Chapter 4. Non-linear Problems, Crack Growth by Fatigue 109 4.1. Introduction 109 4.2. Fatigue and non-linear fracture mechanics 114 4.3. eXtended constitutive law 137 4.4. Applications 164 Chapter 5. Applications: Numerical Simulation of Crack Growth 173 5.1. Energy conservation: an essential ingredient 173 5.2. Examples of crack growth by fatigue simulations 182 5.3. Dynamic fracture simulation 192 5.4. Simulation of ductile fracture 207 Conclusions and Open Problems 227 Summary 233 Bibliography 235 Index 253

Sylvie Pommier, ENS-Cachan, France. Anthony Gravouil, INSA de Lyon, France Nicolas Moes, Ecole Centrale de Nantes, France. Alain Combescure, INSA de Lyon, France.