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Proceedings Paper

Studies on ferroelastic time-dependent domain-switching effects of PZT ceramics
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Paper Abstract

In this paper, rate-dependent switching effects of ferroelastic materials are studied by means of a micromechanically motivated approach. The onset of domain switching is thereby initiated as soon as a related reduction in energy per unit volume exceeds a critical value. Subsequent nucleation and propagation of domain walls during switching process are incorporated via a linear kinetics theory. Along with this micromechanical model, intergranular effects are accounted for by making use of a probabilistic ansatz; to be specific, a phenomenologically motivated Weibull distribution function is adopted. In view of finite-element-based simulations, each domain is represented by a single finite element and initial dipole directions are randomly oriented so that the virgin state of the particular bulk ceramics of interest reflects an un-poled material. Based on a staggered iteration technique and straightforward volume averaging, representative stress versus strain hysteresis loops are computed for various loading amplitudes and frequencies. Simulation results for the rate-independent case are in good agreement with experimentally measure data reported in the literature and, moreover, are extended to rate-dependent computations.

Paper Details

Date Published: 17 April 2007
PDF: 9 pages
Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65260I (17 April 2007); doi: 10.1117/12.715632
Show Author Affiliations
A. Menzel, Univ. of Siegen (Germany)
A. Arockiarajan, Indian Institute of Technology, Madras (India)
S. M. Sivakumar, Indian Institute of Technology, Madras (India)

Published in SPIE Proceedings Vol. 6526:
Behavior and Mechanics of Multifunctional and Composite Materials 2007
Marcelo J. Dapino, Editor(s)

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