Fracture of piezoelectric materials: energy density criterion

被引：54

作者：

Shen, S ^{[1
]}

Nishioka, T ^{[1
]}

机构：

[1] Kobe Univ Mercantile Marine, Dept Ocean Mech Engn, Simulat Engn Lab, Higashinada Ku, Kobe, Hyogo 6580022, Japan

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2000年 / 33卷 / 01期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/S0167-8442(99)00051-8

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, the concept of energy density factor S for piezoelectric materials is presented. In addition to the mechanical energy the electrical energy is included as well. The direction of crack initiation is assumed to occur when S-min reaches a critical value S-cr that can be used as an intrinsic materials parameter and is independent of the crack geometry and loading. The result agrees with empirical evidence qualitatively and explains rationally the effect of applied electric field on fracture strength: positive electric fields decrease the apparent fracture toughness of piezoelectric materials while negative electric fields increase it. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：57 / 65

页数：9

共 14 条

[1] Near-tip fields and intensity factors for interfacial cracks in dissimilar anisotropic piezoelectric media [J].