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Proceedings Paper

Improving transverse actuation of piezoceramics using interdigitated surface electrodes
Author(s): Nesbitt W. Hagood; R. Kindel; Kamyar Ghandi; Paolo Gaudenzi
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Paper Abstract

The possibility of using interdigitated surface electrode patterns to improve the transverse actuation capability of electroceramic actuators is investigated. This pattern produces nonuniform electrical fields in the plane of the wafer which utilize the longitudinal piezoelectric effect to generate larger, more anisotropic planar actuation than conventional piezoelectric devices. Analytical models are developed for a representative electroceramic volume element of a piezoelectric wafer with interdigitated electrodes. These models incorporate full electromechanical coupling through the constitutive relations and are solved using approximate energy methods. The analytical models are compared to piezoelectric finite element solutions. The analysis predicts a range of electrode thickness and spacings which can increase the achievable transverse actuation. An experimental program was performed to validate the analytical results. The experimental results verified the analytical prediction of highly orthotropic large magnitude in plane strains.

Paper Details

Date Published: 8 September 1993
PDF: 12 pages
Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993);
Show Author Affiliations
Nesbitt W. Hagood, Massachusetts Institute of Technology (United States)
R. Kindel, Massachusetts Institute of Technology (United States)
Kamyar Ghandi, Massachusetts Institute of Technology (United States)
Paolo Gaudenzi, Univ. di Roma La Sapienza (Italy)

Published in SPIE Proceedings Vol. 1917:
Smart Structures and Materials 1993: Smart Structures and Intelligent Systems
Nesbitt W. Hagood; Gareth J. Knowles, Editor(s)

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