Modeling and Simulation of THUNDER Actuators using ANSYS Finite Element Analysis

摘要

The use of a quarter-symmetry three-dimensional finite element analysis model in predicting the behavior of the laminated piezoceramic material device known as THUNDER actuators is investigated. The analyses simulating the fabrication process and subsequent applied voltage loading were investigated. The finite element model includes the metal and piezoceramic materials and also the adhesive layers. The elements within the model have very high aspect ratios and also large changes in element height between the various THUNDER layers of material. The simulation begins as stress-free at 270 C and thermal contraction affects cause the deformation of the THUNDER device into the deformed dome shape. The model geometry is then altered so it assumes the deformed shape in a stress-free state. The domed shape of the THUNDER is then subjected to an applied voltage and displacements are obtained. The results of the simulation are compared to laboratory measurements.