Electromechanical analysis of tapered piezoelectric bimorph at high electric field

Nilanjan Chattaraj; Ranjan Ganguli

doi:10.1117/12.2084026

1 April 2015 Electromechanical analysis of tapered piezoelectric bimorph at high electric field

Nilanjan Chattaraj, Ranjan Ganguli

Proceedings Volume 9432, Behavior and Mechanics of Multifunctional Materials and Composites 2015; 94320E (2015) https://doi.org/10.1117/12.2084026
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

Piezoelectric bimorph laminar actuator of tapered width exhibits better performance for out-of-plane deflection compared to the rectangular surface area, while consuming equal surface area. This paper contains electromechanical analysis and modeling of a tapered width piezoelectric bimorph laminar actuator at high electric field in static state. The analysis is based on the second order constitutive equations of piezoelectric material, assuming small strain and large electric field to capture its behavior at high electric field. Analytical expressions are developed for block force, output strain energy, output energy density, input electrical energy, capacitance and energy efficiency at high electric field. The analytical expressions show that for fixed length, thickness, and surface area of the actuator, how the block force and output strain energy gets improved in a tapered surface actuator compared to a rectangular surface. Constant thickness, constant length and constant surface area of the actuator ensure constant mass, and constant electrical capacitance. We consider high electric field in both series and parallel electrical connection for the analysis. Part of the analytical results is validated with the experimental results, which are reported in earlier literature.

Citation Download Citation

Nilanjan Chattaraj and Ranjan Ganguli "Electromechanical analysis of tapered piezoelectric bimorph at high electric field", Proc. SPIE 9432, Behavior and Mechanics of Multifunctional Materials and Composites 2015, 94320E (1 April 2015); https://doi.org/10.1117/12.2084026

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