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Domain switch toughening in polycrystalline ferroelectrics

Published online by Cambridge University Press:  01 January 2006

Jianxin Wang  and
Chad M. Landis
Jianxin Wang
Affiliation:
Department of Mechanical Engineering and Materials Science, Rice University, Houston, Texas 77005
Chad M. Landis*
Affiliation:
Department of Mechanical Engineering and Materials Science, Rice University, Houston, Texas 77005
*
a)Address all correspondence to this author. e-mail: [email protected] This paper was selected as the Outstanding Meeting Paper for the 2005 MRS Spring Meeting Symposium CC Proceedings, Vol. 881E.
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Abstract

Mode I steady crack growth was analyzed to determine the toughening due to domain switching in ferroelectric ceramics. A multi-axial, electromechanically coupled, incremental constitutive theory is applied to model the material behavior of the ferroelectric ceramic. The constitutive law is then implemented within the finite element method to study steady crack growth. The effects of mechanical and electrical poling on the fracture toughness are investigated. Results for the predicted fracture toughness, remanent strain distributions, and domain switching zone shapes and sizes are presented. Finally, the model predictions are discussed in comparison discrete switching models and to experimental observations.

Keywords

FerroelectricFracturePiezoelectric
Type
Outstanding Meeting Papers: Articles
Information
Journal of Materials Research , Volume 21 , Issue 1 , January 2006 , pp. 13 - 20
Copyright
Copyright © Materials Research Society 2006

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