Scattering problem of the interface circular cavity in piezoelectric media

The present work investigates the scattering problem of plane SH wave in piezoelectric media with an interface circular cavity. With using the Hankel functions and the expansion method of wave functions, the basic Green's function solutions are given. Then, based on the interface continuity conditions, the integral equations of the scattering problem with the interface circular cavity are established. By solving the integral equations, the dynamic stress around the hole is obtained. Some numerical examples are given to show the influence of the material parameters upon dynamic concentration factors. It is found that the change of the material parameters has a great influence on the dynamic stress concentration.