抄録
The basic research into the area of the behavior of piezoelectrics under static loading condition in far behind the effort put forth in the study of the vibrational behavior of piezoelectrics. Also, the application of the vibrational characteristics of piezoelectrics has been widespread, but the application of the static characteristics has been relatively left untapped. The piezoelectric based actuators are gaining more pupularity in many areas ranging from micro-motion control as positioners to macro-motion in space applications. So, it is very vital to understand the behavior of practical piezoelectric micro actuator under arbitrarily applied external voltage. The solution for moderately complex piezoelectric model using analytical methodology is very challenging. So, a numerical solution scheme based on the method of finite elements has been developed to analyze the deformations of and potentials within piezoelectric materials subjected to external static voltage loading. The formulation of the finite element equations developed and used for computer implementation is also dealt with. Computer software has been created to model piezoelectric three-dimensional geometries, based on the equations developed. The case studies chosen for evaluation of this numerical scheme are representative of real-world piezoceramic materials. The results are found to be in excellent agreement with published product data. This work carried out would be a foundation for the development of a powerful analysis tool, capable of testing multiple conceptual designs of piezoelectric actuators.
