TRANSIENT RESPONSE OF A PIEZOELECTRIC CERAMIC WITH TWO COPLANAR CRACKS UNDER ELECTROMECHANICAL IMPACT

被引：0
|
作者：
陈增涛
余寿文
机构：
[1] Department of Engineering Mechanics, Tsinghua University, Beijing, China 100084
[2] Engineering Mechanics and Design Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada
来源：
Acta Mechanica Sinica | 1999年 / 15卷 / 04期
关键词：
piezoelectric ceramic; fracture; dynamics; coplanar crack; stress intensity factor; integral transform; singular integral equation;
D O I：
暂无
中图分类号：
O221.3 [动态规划];
学科分类号：
摘要：
The transient response of two coplanar cracks in a piezoelectricceramic under antiplane mechanical and inplane electric impacting loads is investi-gated in the present paper. Laplace and Fourier transforms are used to reduce themixed boundary value problems to Cauchy-type singular integral equations in Laplacetransform domain, which are solved numerically. The dynamic stress and electric dis-placement factors are obtained as the functions of time and geometry parameters.The present study shows that the presence of the dynamic electric field will impedeor enhance the propagation of the crack in piezoelectric ceramics at different stagesof the dynamic electromechanical load. Moreover, the electromechanical response isgreatly affected by the ratio of the space of the cracks and the crack length.
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页码：325 / 333
页数：9
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