DISLOCATION INTERACTING WITH A SLIGHTLY WAVY INTERFACE

The undulant interface of a bi-material, as results from manufacturing or instability under high stress, may provide certain preferred place s where microdefects accumulate. In the present paper the interaction between a screw dislocation and a slightly wavy interface is studied v ia a regular perturbation scheme. The Peach-Koehler force calculated f rom the first order perturbed solution of stress and displacement fiel ds indicates that there are certain ''equilibrium'' points at the inte rface. Dislocations are expected to be accumulated around these points . In turn, microdefects, such as microcracks and microvoids, may be in itiated near these sites.