Energy release rate and bifurcation angles of piezoelectric materials with antiplane moving crack

被引：15

作者：

Hou, MA ^{[1
]}

Qian, XQ ^{[1
]}

Bian, WF ^{[1
]}

机构：

[1] Univ Petr, Dongying Shandong 257062, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FRACTURE | 2001年 / 107卷 / 04期

关键词：

dlectroelastic dynamics; dynamic fracture mechanics; intensity factor; energy release rate; crack bifurcation angles;

D O I：

10.1023/A:1007678728046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamic fracture problems of the piezoelectric materials with antiplane moving crack are analysed by using function of complex variable in the paper. The results show that the coupled elastic and electric fields inside piezoelectric media depend on the speed of the crack propagation, and have singularity at the crack tip. The stress intensity factor is independent of the speed of the crack propagation, which is identical to the conclusion of purely elasticity. Moreover, independent of the electric loading, the dynamic energy release rate can be expressed by the stress intensity factor and enlarge with the increase of crack speed. High speed of the crack moving could impede the crack growth. At the same time, the crack can be propagated into either curve or bifurcation if the crack speed is higher than the critical speed.

引用

页码：297 / 306

页数：10

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