MODELING OF THERMO-ELECTRO-ELASTIC EFFECTIVE BEHAVIORS OF PIEZOELECTRIC COMPOSITE MEDIUMS AND ANALYSIS OF REINFORCEMENT ORIENTATION EFFECTS

摘要

In this paper a thermo-electro-elastic modeling for piezoelectric inclusions in an infinite non-piezoelectric matrix is proposed. Extension of the heterogeneous inclusion problem of Eshelby for elastic to electro-elastic behavior is formulated in terms of four interaction tensors. These tensors are basically used to derive the self-consistent model and Mori-Tanaka approaches for ellipsoidal piezoelectric inclusions. Solutions are based on numerical computations of these tensors for various types of inclusions. Using the obtained results, effective thermo-electro-elastic moduli of piezoelectric multiphase composites are investigated by an iterative procedure in the context of self-consistent scheme. The influence of the pooling direction effect on the thermo-electro-elastic coefficients is studied and several numerical tests of Ceramic/Epoxy composites are investigated.