u2.05.07 Instructions for using cohesive zone models

Summary

This documentation is intended to provide the information needed by a user wishing to model crack initiation and propagation with cohesive models (CZM).

In the first part, we recall the main lines of this type of model, their fields of application, advantages and limitations. The second part is intended to provide specific recommendations for creating meshing. Tips for use in various fields of fracture mechanics are detailed in the third part. Finally, we end this documentation with an example of a command file commented with reference to the advice given in the parts above.

• 1. Introduction
• 2. Synthesis of cohesive models
  • 2.1. Theoretical framework
  • 2.2. Finite element models
  • 2.3. Cohesive laws
  • 2.4. Definition of the local coordinate system at the crack
• 3. Tips on meshing
  • 3.1. Generalities
  • 3.2. Creating the mesh
  • 3.3. Cohesive zone modeling
  • 3.4. Definition of a cohesive pre-crack
  • 3.5. Multi-cracking
• 4. Tips for use
  • 4.1. Generalities
  • 4.2. A linear interface to validate your data entry
  • 4.3. Fragile fracture calculations
  • 4.4. Ductile fracture calculations
  • 4.5. Fatigue calculations
  • 4.6. Dynamic calculations
  • 4.7. Post-treatment of cracking and control POST_CZM_FISS
• 5. Implementation of a calculation CZM
  • 5.1. List of test cases with cohesive models
  • 5.2. Commented example, beam DCB in fatigue
• 6. Conclusion
• 7. Bibliography