The Model of Stiff Imperfect Interface and Its Application in Interaction between Dislocation and Interface

Most of the existing studies on interface/dislocation treat the interface either as ideal contact interface, or as soft imperfect interface. In present study, the imperfect interface conditions for anti-plane problem are derived systematically on the basis of asymptotic expansion for the elastic field in a layer. Furthermore, the interaction of a screw dislocation with a stiff imperfect interface described by the proposed interface model is discussed. The force acting on a screw dislocation due to the presence of the stiff imperfect interface is obtained for two joint half-spaces. The results show that the interacting force on a screw dislocation is between the values for a perfectly bonded interface and that for a rigid contact interface. The stiff imperfect interface model is firstly proposed and applied in this work.