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Finite Element Analysis of Composite Piezoelectric Actuators Incorporating Nonlinear Material Behavior

[+] Author Affiliations
M. A. Siddiq Qidwai, Virginia G. DeGiorgi

US Naval Research Laboratory, Washington, DC

Paper No. IMECE2010-37497, pp. 405-416; 12 pages
doi:10.1115/IMECE2010-37497
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4446-5
  • Copyright © 2010 by ASME

abstract

There is always the question of choosing the appropriate constitutive model when simulating and analyzing piezoelectric material performance. Linear material modeling typically requires less computational resources; however this approach may not accurately capture the performance. In this paper, the scope of linear predictive modeling was analyzed by comparison with nonlinear modeling. Monomorph and bimorph actuators were modeled with each approach, and their respective performances were compared. It was found that even under small magnitudes of electric field, differences arise between the two approaches. The magnitude of the deviations depended upon actuator composition, applied electric field and boundary conditions. The impact of these differences can be considerable, such as for precision-based applications and cyclic applications where initial design errors could compound.

Copyright © 2010 by ASME

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