Abstract
This paper analyzes the performance of lightweight piezo-composite actuators (LIPCAs)including the material non-linearity of the embedded 3203HD PZT wafer. For this analysis,we used a piezo-shell element code based on a nine-node assumed strain shell elementformulation. The material non-linearity was included in the formulation due to the largeobserved discrepancies in the measured displacement and computed actuation displacementbased on the linear analysis, especially at high input voltages. An experimentallyextracted piezo-strain function of the PZT wafer and incremental formulation wereincorporated into the linear finite element code to improve the accuracy of the estimatedactuation displacement of the LIPCA. The non-linear piezo-shell program was used toestimate the non-linear performance of the LIPCA. The actuation displacementpredicted from the non-linear code showed much better agreement with the measureddata.
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