Electro-elastic stress analysis for a screw dislocation interacting with a coated inclusion in piezoelectric solid
Electro-elastic stress analysis for a screw dislocation interacting with a coated inclusion in piezoelectric solid
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DOI：
10.1007/s00707-004-0082-5
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发表时间：
2004-11
期刊：
影响因子：
2.7
通讯作者：
Z. Xiao;J. Yan;B. J. Chen
中科院分区：
文献类型：
--
作者：
Z. Xiao;J. Yan;B. J. Chen
对压电材料中涂层夹杂物附近的压电螺旋位错的相互作用问题进行了电弹性应力研究。在我们的研究中，涉及三个不同的材料相：基体、夹杂物和涂层。所有三种材料都是压电材料并且具有不同的材料常数。利用复变量方法获得了应力场和电位移场的显式闭式解析解。作用在螺型位错上的像力通过广义 Peach-Koehler 公式计算。执行了不同材料常数组合的数值示例。研究并讨论了夹杂物和涂层的材料特性对图像力的影响。
The electro-elastic stress investigation on the interaction problem of a piezoelectric screw dislocation near a coated inclusion in a piezoelectric material has been carried out. In our study, three dissimilar material phases are involved: the matrix, the inclusion and the coating layer. All the three materials are piezoelectric and with different material constants. Explicit closed-form analytical solutions for the stress and electric displacement fields are obtained by using the complex variable method. The image force acting on the screw dislocation is calculated by using the generalized Peach-Koehler formula. Numerical examples for different material constant combinations are performed. The influences of material properties of the inclusion and the coating layer on the image forces are examined and discussed.