Non-singular stresses effects on two interacting equal collinear cracks

Abstract

An analysis of the effect of the interaction between two equal collinear cracks embedded in an infinite elastic plane medium on the fracture response is considered. The expressions of the stress intensity factors under general biaxial loading to infinity are worked out by using the expressions known in the case of a normal stress as well as of a shear stress which are perpendicular and parallel respectively to the cracks line. After noting that the non-singular term of the local circumferential stress is expressed in the same way as the simple line crack, the effects of the stress parallel to the cracks line on the prediction of the angle of initial crack extension, on the fracture loci and on the critical applied loads are studied.