Stress wave propagation in laminated piezoelectric spherical shells under thermal shock and electric excitation

The article presents an analytical method for stress wave propagation of spherically symmetric motion in laminated piezoelectric shells subjected to thermal shock and electric excitation loads. The analytical expressions of displacement, stresses and electric potential for each spherically symmetric shell layer are obtained by means of finite Hankel transforms and Laplace transforms. Utilizing the interface continuity conditions between layers, and the boundary conditions at the internal and external surfaces of the laminated spherical shells, the thermo-electro-stress wave propagation in symmetrically laminated piezoelectric spherical shells is obtained. From numerical calculations, it is seen that the present method is suitable for symmetrically laminated piezoelectric hollow spheres with arbitrary thickness subjected to thermal shock and transient electric excitation. It is significant to know the phenomena of stress wave propagation in symmetrically laminated piezoelectric spherical shells to evaluate the dynamic strength and electric signal of the laminated structures. (c) 2004 Elsevier SAS. All rights reserved.