An eigen expression for piezoelectrically stiffened elastic and dielectric constants based on the static theory

The piezoelectrically stiffened elastic and dielectric constants are studied here by the eigen mechanical and electric theory under physical presentation. The complete set of uncoupled expressions of the equivalent elastic and dielectric constants for various piezoelectric solids is obtained. In final part of this paper, the equivalent constants for piezoelectric material of class 6 mm are discussed.