NONLINEAR MECHANICS FOR ADAPTIVE PIEZOELECTRIC COMPOSITE PLATES WITH APPLICATIONS TO BUCKLING AND POSTBUCKLING BEHAVIOR

摘要

Coupled mechanics for piezoelectric laminates and plates are presented which include nonlinear effects due to initial stresses, large displacements and rotations. Using this mechanics background, a nonlinear finite element method and an incremental solution are formulated for the buckling and postbuckling analysis of adaptive plate structures and an eight -node plate finite element is developed. The FE enables prediction of buckling and postbuckling of piezoelectric plates induced by either mechanical or electrical loading. Numerical results quantify the mechanical buckling and postbuckling of sensory composite beams and plates, the possibility of piezoelectric buckling-postbuckling induced by actuators, and the feasibility of active buckling compensation.