Abstract
The displacement and polarization switching properties of piezoelectric laminated actuators have been investigated theoretically, numerically, and experimentally. A laminated beam theory solution is developed for the piezoceramic/metal/piezoceramic actuator, and the effects of electric fields on the displacements of the actuators are analyzed. The mathematical procedure of the present analysis is simple and clear, and the resulting solutions for the displacement of the cantilever laminated beam actuator are highly accurate. A nonlinear three-dimensional finite element analysis is also employed. Bending tests are used to validate the numerical predictions, using laminated actuators made with ferroelectric lead zirconate titanate piezoelectric layers and Fe-48% Ni host material. Good agreement is obtained between the tests and predictions.
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