Assumed Stress Hybrid Finite-Element Method for Fracture Mechanics and Elastic-Plastic Analysis

摘要

The purpose of the report is to investigate the reasibility of the assumed stess hybrid finite element method on the analysis of linear fracture mechanics and the elastic-plastic analysis. The hybrid stress model is applied for the evaluation of the elastic stress intensity factors at the tip of a sharp crack. Example solutions include plane stress cracks of both the opening type and the in-plane shear type for isotropic materials and of the opening type for anisotropic materials. Convergence of the numerical solution and the optimum arrangement of the finite element meshes have also been studied. The hybrid stress model is applied to the determination of the static response for structures with elastic-plastic material behaviors. (Author Modified Abstract)