Boundary Elements for Debond Stress Analysis; Fracture Mechanics Stress Analysis.

摘要

To understand and quantify debonding events in composite materials it is necessary to have accurate stress analysis in the area of stress concentrators. Boundary integral equation (BIE) techniques are proposed as a potentially more accurate approach than finite elements. In particular, the debond stress analysis of a rod being pulled out of a matrix material is considered. A model problem is posed consisting of an edge cracked bar under longitudinal shear deformation and a BIE formulation is proposed using a subtraction of singularity technique. An extensive review of integral equation approaches to various fracture mechanics problems is also presented, with suggested new solution techniques for unsymmetric crack configurations.