Transient response of dissimilar piezoelectric layers with multiple interacting interface cracks

被引:20
|
作者
Fartash, A. H. [1 ]
Ayatollahi, M. [1 ]
Bagheri, R. [2 ]
机构
[1] Univ Zanjan, Fac Engn, Dept Mech Engn, POB 45195-313, Zanjan, Iran
[2] Islamic Azad Univ, Mechatron Fac, Dept Mech Engn, Karaj Branch, Alborz, Iran
关键词
Multiple interface cracks; Dissimilar piezoelectric layers; Impact loads; Dynamic field intensity factor; Dynamic energy release rate (DERR); DYNAMIC-RESPONSE; COPLANAR CRACKS;
D O I
10.1016/j.apm.2018.09.030
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this study, we examine the dynamic behavior of two bonded dissimilar piezoelectric layers containing multiple interfacial cracks subjected to electro-mechanical impact loading. The problem was formulated through Fourier transformation into singular integral equations in which the unknown variables are the jumps of displacement and electric potential across the crack surface in the Laplace transform domain. The resulting integral equations together with the corresponding single-valued conditions are solved numerically for the densities of electro-elastic dislocations on a crack surface. The dynamic field intensity factors and dynamic energy release rate (DERR) history are obtained for both permeable and impermeable crack. The stress field is also obtained for the interface crack under impact loads. The results show that the field intensity factors at the crack tips and dynamic energy release rate depend on the interfacial crack geometry, electromechanical coupling and the electric boundary conditions on the crack surface. (C) 2018 Elsevier Inc. All rights reserved.
引用
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页码:508 / 526
页数:19
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