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Proceedings Paper

An experimental study of domain switching criterion for soft PZT piezoceramics subjected to coaxial proportional electromechanical loading
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Paper Abstract

Modern piezoelectric transducers normally have complicated structures and work under severe loading conditions. Application of an external load in excess of a critical level will cause domain switching in the material and therefore lead to a significant nonlinearity and hysteresis in the polarization and strain response. To develop a constitutive model concerning the large-signal nonlinear behavior of ferroelectric piezoceramics, it is desirable to determine a switching criterion in the multiaxial stress and electric field states. In this experimental work, "soft" lead zirconate titanate (PZT) specimens in initially unpoled state were subjected to a proportional electromechanical loading, in which a compressive stress and a parallel, proportional electric field were applied simultaneously. By varying the relative proportions of the stress and E-field between tests, a family of nonlinear polarization and strain responses were obtained. An attempt has been made to explain the experimental findings by simultaneously taking into account the contributions of dielectric response, elastic deformation, piezoeffects, and irreversible domain switching. Based on an offset method, switching (domain reorientation threshold) surfaces were mapped out in the biaxial stress and electric field space. Finally, several switching conditions existing in the literature were summarized and compared with the experimental data obtained in this work.

Paper Details

Date Published: 16 May 2005
PDF: 8 pages
Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); doi: 10.1117/12.599592
Show Author Affiliations
Dayu Zhou, Forschungszentrum Karlsruhe (Germany)
Marc Kamlah, Forschungszentrum Karlsruhe (Germany)
Zhenggui Wang, Forschungszentrum Karlsruhe (Germany)
Bernd Laskewitz, Forschungszentrum Karlsruhe (Germany)

Published in SPIE Proceedings Vol. 5761:
Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

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