Dynamic analysis of SH wave by a three-layer inclusion near interface in bi-material half space

In this paper, the scattering of SH waves by a three-layer inclusion near the bi-material interface has been studied. A complex function method is employed to solve a two-dimensional wave propagation problem. The displacement fields in the bi-material half space and inside the linings of the inclusion are constructed, satisfying the governing equation, and unknown coefficients are solved from boundary conditions. The bi-material half space is separated into two quarter spaces, and the region matching method is used to determine the extra-forces on the interface. With the aid of the Green function method, the displacement fields owing to the forces are obtained. Then, the dynamic stress concentration factors (DSCFs) around the inner and outer surfaces of the inclusion are presented graphically, considering different medium parameters. Results are compared with those of earlier investigations, and the effect of parameters on the DSCF is discussed.