r3.06.13 Mixed interface finite elements for cohesive zone models (xxx_ INTERFACE and xxx_ INTERFACE_S)

Summary:

This document presents a finite mixed interface element for cohesive zone models. The corresponding keywords for the models in*Code_Aster* are PLAN_INTERFACE, AXIS_INTERFACE ,3D_ INTERFACE, PLAN_INTERFACE_S, AXIS_INTERFACE_S, and 3D_ INTERFACE_S.

Table of contents

• 1. Introduction
• 2. Construction of the mixed interface finite element
  • 2.1. Principle of energy minimization in fracture mechanics
  • 2.2. Search for a saddle point by a decomposition method — coordination
  • 2.3. Discretization of the finite element
• 3. Cohesive law integration CZM_TAC_MIX
  • 3.1. Preliminary notations
  • 3.2. Definition of cohesive law
  • 3.3. Digital integration
• 4. Conclusion
• 5. Bibliography
• 6. Description of document versions