Abstract: This paper is to solve the interlaminar stresses of adhesive lap joint by the energy method without considering the adhesive layer. The joint is made of two identical narrow plates. Two cases are discussed: one is for the isotropic material and the other is for orthotropic material. Because of the different materials forming the joint, the length of distribution and the magnitude of the interlaminar stresses for the two cases will be very different.

Key words: scattering of SH-waves, triangular hill, semi-cylindrical canyon, multi-polar coordinate, complex function