ELASTIC PLASTIC ASYMPTOTIC ANALYSIS OF CRACKS ON BIMATERIAL INTERFACE UNDER THREE DIMENSIONAL CONSTRAINT

An investigation on the near tip fields of cracks lying on the interface of two strain hardening materials has been conducted under three dimensional(3D) stress constraint. By using the J 2deformation theory and cons idering the 3D stress constraint factor T z, an exact asymptotic solution was obtained. It is found that there is strong effect of 3D constraint on the continuities and singularities of radial stress and equivalent stress.