On the fracture toughness of ferroelectric ceramics with electric field applied parallel to the crack front

被引：30

作者：

Wang, JX ^{[1
]}

Landis, CM ^{[1
]}

机构：

[1] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77251 USA

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 12期

关键词：

fracture toughness; finite element methods; ferroelectrics; piezoelectrics; domain switching;

D O I：

10.1016/j.actamat.2004.03.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mode I steady crack growth is analyzed to determine the toughening due to domain switching in ferroelectric ceramics with electric field applied parallel to the crack front. 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 electric field on the fracture toughness of both initially unpoled and poled materials are investigated. Results for the predicted fracture toughness, remanent strain and remanent polarization distributions, and domain switching zone shapes and sizes are presented. The effects of the plane-strain constraint and transverse stress are also established. Finally, the model predictions are discussed in comparison to recent experimental observations. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3435 / 3446

页数：12

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