Stress Sensitivity of Damage Evolution Equation and Mesh-Dependence in Local Approach

Abstract

Stress sensitivity of damage evolution equation and related mesh dependence in local approach to creep crack growth analysis were investigated. According to the numerical results for a plate subjected to uniform tension, the damage localization was observed under the conditions of vanishing pre-existed stress or strain concentrations. The reason for this damage localization was attributed mainly to the stress sensitivity of the damage evolution equation. Finally, several regularization methods in local approach were discussed and compared with each other by analyzing axisymmetric problems.