NEAR-SURFACE PENNY-SHAPED CRACK AT THE INTERFACE OF PHYSICAL-MECHANICAL PROPERTIES OF A MATERIAL

This paper presents an analytical investigation of a nonclassical fracture mechanics axisymmetrical problem for a near-surface penny-shaped crack at the interface of physical and mechanical properties of a material. The crack is located in a near-surface layer parallel to the surface of a halfspace, which is subjected to uniform compression parallel to the crack plane. An approach proposed by Guz (1983) in the framework of the three dimensional linearised solid mechanics is used. Analysis involves reducing the problem to a system of Fredholm integral equations of the second kind, where the solutions are identified with harmonic potential functions. The representations of the stress intensity factors near the crack edges are obtained