Singularities interacting with interfaces and cracks

Solutions to singularities such as point force, point moment, edge dislocation and transformation strain spot embedded in bonded elastic blocks of dissimilar materials are found to relate to the solutions to the same singularities in an infinite homogeneous plane by a formula independent of the nature of the singularities. This universal result is then used to analyze the interactions between singularities and interface cracks. The complete solutions and stress intensity factors are presented for two important interface crack configurations.