Influence of the 3D interface crack front shape on the fracture parameters

Abstract

Mechanical properties of multi-layer materials are often restrained by the strength of the interface between the constituting materials. Interface is frequently a spot of the crack initiation and delamination usually starts at corners. The singular stress field corresponds to interface destruction and depends on characteristics of materials and the shape of the corner. The growth of an interfacial crack, from the straight angle along the joint plane between the two long plates made of different materials, for various shapes of the crack front, is considered in this paper.