Edge dislocation in a lamellar inhomogeneity with a slipping interface.

The paper develops the solution of the plane elasticity problem in which a source of internal strain is located inside an infinite lamellar inhomogeneity, by assuming that the lamella matrix interface does not transmit tangential displacements or shear tractions. This condition is very likely to occur in lamellar or layered composite materials at elevated temperatures. It is found that the elastic field may be given in terms of the source bulk field plus one parameter formed from four elastic constants. The solution is used to calculate the image force on an edge dislocation within the lamellar inhomogeneity. It is shown that for some combination of material constants the force differs remarkably from that calculated in the perfectly-adhering interface case.