Open Access

ARTICLE

Importance of Three-Dimensional Piezoelectric Coupling Modeling in Quantitative Analysis of Piezoelectric Actuators

Daisuke Ishihara^1,*, Prakasha Chigahalli Ramegowda², Shoichi Aikawa¹, Naoki Iwamaru¹

1 Department of Intelligent and Control Systems, Kyushu Institute of Technology, Iizuka, Fukuoka, 820-8502, Japan
2 Institute of Microelectronics, Agency for Science, Technology and Research, Innovis Tower, 138634, Singapore

* Corresponding Author: Daisuke Ishihara. Email:

Computer Modeling in Engineering & Sciences 2023, 136(2), 1187-1206. https://doi.org/10.32604/cmes.2023.024614

Received 02 June 2022; Accepted 21 September 2022; Issue published 06 February 2023

Abstract

This paper demonstrates the importance of three-dimensional (3-D) piezoelectric coupling in the electromechanical behavior of piezoelectric devices using three-dimensional finite element analyses based on weak and strong coupling models for a thin cantilevered piezoelectric bimorph actuator. It is found that there is a significant difference between the strong and weak coupling solutions given by coupling direct and inverse piezoelectric effects (i.e., piezoelectric coupling effect). In addition, there is significant longitudinal bending caused by the constraint of the inverse piezoelectric effect in the width direction at the fixed end (i.e., 3-D effect). Hence, modeling of these effects or 3-D piezoelectric coupling modeling is an electromechanical basis for the piezoelectric devices, which contributes to the accurate prediction of their behavior.

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Keywords

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