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Electromechanical Analysis of Tapered Piezoelectric Bimorph at High Electric Field

Chattaraj, Nilanjan and Ganguli, Ranjan (2015) Electromechanical Analysis of Tapered Piezoelectric Bimorph at High Electric Field. In: Conference on Behavior and Mechanics of Multifunctional Materials and Composites, MAR 09-11, 2015, San Diego, CA.

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Official URL: http://dx.doi.org/ 10.1117/12.2084026

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.

Item Type: Conference Proceedings
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Additional Information: Copy right for this article belongs to the SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
Keywords: Tapered piezoelectric bimorph; High electric field; Actuator; Smart Structure
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 19 Jul 2015 09:23
Last Modified: 19 Jul 2015 09:23
URI: http://eprints.iisc.ernet.in/id/eprint/51832

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