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Proceedings Paper

Modeling of domain wall contribution to the effective properties of polycrystalline ferroelectric ceramics
Author(s): Johannes Roedel; Wolfgang S. Kreher
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Paper Abstract

A constitutive model for the nonlinear effective behavior of ferroelectric ceramics is presented. The model is developed on the basis of the effective medium approximation which describes the interaction of the crystallites in a statistical way. Additionally, a particular simplified domain configuration within the crystallites and the possibility of domain wall motion are taken into account. In connection with a thermodynamic criterion for the domain wall displacement the volume fractions of domains can be calculated dependent on the crystallite orientation and the applied load in a self-consistent manner. This mechanism leads to an extrinsic contribution to the effective behavior. If the domain wall displacement is associated with energy dissipation the macroscopic behavior is nonlinear and hysteretic.

Paper Details

Date Published: 14 June 2000
PDF: 10 pages
Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, (14 June 2000); doi: 10.1117/12.388219
Show Author Affiliations
Johannes Roedel, Dresden Univ. of Technology (Germany)
Wolfgang S. Kreher, Dresden Univ. of Technology (Germany)

Published in SPIE Proceedings Vol. 3992:
Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

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