A cracked coated solid subjected to contact loading

The rolling wear of a cracked surface treated component is modelled by a frictionless contact between a coated elastic solid containing an edge crack penetrating the interface and a rigid circular indenter. The problem is formulated by the superposition of the solution to the problem of an edge crack, penetrating the interface in a coated substrate under Mode I and Mode II loading conditions, and the solution to the contact problem between an uncracked coated solid and a rigid circular indenter. The parametric study performed shows how the stiffness ratio, the prestressing in the coating, the radius of the indenter and the distance from the contact load influence the Mode I and Mode II stress intensity factors (SIFs).