Investigation of imperfect interface on behaviors of piezoelectric laminates under transient thermal shock

Based on the generalized piezoelectric-thermoelastic theory, the performance of imperfect interface on the dynamic response of an infinite extent piezoelectric plate excited by thermal shock is presented. As a simple case, we first investigate the behaviors of a single-layered plate which is traction free and applied thermal shock. After that a double-layered plate with imperfect interface is studied, and the same boundary conditions are adopted on its external surfaces as used on the single-layered plate. The Laplace transform and the Riemann-sum approximation method are utilized to solve the coupled piezoelectric-thermo-elastic governing equations of the dynamic problems. The semi-analytical solutions are obtained. Results obtained reveal that the imperfect interface leads to the reduced speed of thermo-elastic wave, the weak attenuation of temperature and the enlarged amplitude of displacement. Furthermore, a temperature drop at the front of the thermal wave is also newly found.