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A Model for Asymmetric Hysteresis in Piezoceramic Materials

Published online by Cambridge University Press:  15 February 2011

R.C. Smith  and
Z. Ounaies
R.C. Smith
Affiliation:
CRSC, Department of Mathematics, North Carolina State University, Raleigh, NC 27695, rsmith@eos.ncsu.edu
Z. Ounaies
Affiliation:
ICASE, Mail Stop 132C, NASA Langley Research Center, Hampton, VA 23681, z.ounaies@larc.nasa.gov
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Abstract

This paper focuses on the characterization of hysteresis exhibited by piezoelectric materials at moderate to high field levels. For soft materials in which dipoles are easily reconfigured, the hysteresis loop is observed to be rotationally symmetric about the zero field, zero polarization point and symmetric models can be employed. In harder materials, however, the loops are no longer rotationally symmetric which necessitates the development of commensurate characterization techniques. The model considered here is based upon the quantification of reversible and irreversible changes in polarization due to bending and translation of domain walls pinned at inclusions inherent to the materials. The performance of the model is illustrated through comparison with PZT4 data

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 285
Copyright
Copyright © Materials Research Society 2000

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