Piezoelastic study on singularities interacting with circular and straight interfaces

The piezoelastic investigation for a circular inclusion embedded in a sandwich has been carried out. Each medium of the composite is assumed to be transversely isotropic with hexagonal symmetry, which has an isotropic basal plane of x₁x₂-plane and a poling direction of x₃-axis. The electromechanical loadings considered in this paper include a point force and a point charge located in the middle layer of the sandwich. An efficient procedure is established by combining the analytical continuation method and alternating technique to derive the general forms of the piezoelastic fields in terms of the corresponding problem. Numerical results are provided for a number of particular examples to study the influence of material combinations, geometry, and loading condition on both the mechanical and electric response.