Stress induced phase transformations in piezoelectric laminates with shape memory alloy layers

A laminated plate with orthotropic piezoelectric layers undergoing cylindrical bending under the application of electromechanical load is considered. The elasticity solution is extended to the coupled electroelastic field by adding to the Airy stress function the electric potential. A similar procedure is applied incrementally to the case of a hybrid composite plate with piezoelectric layers attached to shape memory alloy (SMA) thin strips. The incremental formulation of the problem incorporates both stiffness changes and transformation strains in the SMA induced by the piezoelectric layers. A full loading-unloading cycle in the applied electric field is shown to lead to energy dissipation in the laminated plate due to the dissipative process of stress induced martensitic phase formation.

Stress induced phase transformations in piezoelectric laminates with shape memory alloy layers Conference Paper