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Advances in Materials Science and Engineering
Volume 2013, Article ID 620231, 10 pages
Research Article

Analytical Optimization of Piezoelectric Circular Diaphragm Generator

1Mechanical Department, Engineering Faculty, Razi University, Kermanshah 67149-67346, Iran
2Mechanical Department, Dareshahr Branch, Islamic Azad University, Dareshahr 6961713751, Iran

Received 14 May 2013; Revised 6 August 2013; Accepted 20 August 2013

Academic Editor: Luciano Mescia

Copyright © 2013 S. Mohammadi and M. Abdalbeigi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents an analytical study of the piezoelectric circular diaphragm microgenerator using strain energy method. Piezoelectrics are the intelligent materials that can be used as transducer to convert mechanical energy into electrical energy and vice versa. The aim of this paper is to optimize produced electrical energy from mechanical pressure. Therefore, the circular metal plate equipped with piezoelectric circular patch has been considered with simply and clamped supports. A comprehensive modeling, parametrical study and the effect of the boundary conditions on the performance of the microgenerator have been investigated. The system is under variable pressure from an oscillating pressure source. Results are presented for PZT and PMN-PT piezoelectric materials with steel and aluminum substrates. An optimal value for the radius and thickness of the piezoelectric layer with a special support condition has been obtained.