Mixed-mode stress intensity factors for cracks located at or parallel to the interface in bimaterial half planes

Abstract

This paper presents a method for obtaining the mixed-mode stress intensity factors for bimaterial interface cracks or cracks parallel to the bimaterial interface in half-plane configurations. First, dislocation solutions in two different bimaterial half planes are presented. The boundaries of these two half planes are either parallel or perpendicular to the bimaterial interface. A surface dislocation model is employed to ensure the traction-free boundary conditions. The dislocation solutions are then applied to calculate the mixed mode stress intensity factors of cracks either at the interface or parallel to the interface. The effects of material mismatch, material interface, and boundary on the stress intensity factors are investigated extensively.