Effect of electric displacement saturation on the stress intensity factor for a crack in a ferroelectric ceramic

被引：20

作者：

Jeong, KM ^{[1
]}

Kim, IO ^{[1
]}

Beom, HG ^{[1
]}

机构：

[1] Chonnam Natl Univ, Dept Mech Engn, Coll Engn, Kwangju 500757, South Korea

来源：

MECHANICS RESEARCH COMMUNICATIONS | 2004年 / 31卷 / 03期

关键词：

ferroelectric ceramics; electric saturation zone; domain switching; stress intensity factor;

D O I：

10.1016/S0093-6413(03)00093-4

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A crack in a ferroelectric ceramic with perfect saturation under electric loading is analyzed. The boundary of the electric displacement saturation zone ahead of the crack tip is assumed to be ellipse in shape. The shape and size of ferroelectric domain switching zone near a crack tip is determined based on the nonlinear electric theory. The stress intensity factor induced by ferroelectric domain switching under small-scale conditions is numerically obtained as a function of the electric saturation zone parameter and the ratio of the coercive electric field to the yield electric field. It is found that the stress intensity factor increases as the ratio of the semi-axes of the saturation ellipse increases. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：373 / 382

页数：10

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