文献类型：期刊文献

英文题名：A piezoelectric screw dislocation in a bimaterial with surface piezoelectricity

作者：Wang, Xu[1];Fan, Hui[2]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

年份：2015

卷号：226

期号：10

起止页码：3317

外文期刊名：ACTA MECHANICA

收录：;EI(收录号：20152400931836);WOS:【SCI-EXPANDED(收录号:WOS:000361346600008)】；

基金：The reviewers' comments and suggestions are highly appreciated. This work is supported by the National Natural Science Foundation of China (Grant No. 11272121).

语种：英文

外文关键词：Piezoelectricity - Screw dislocations - Screws - Electric lines - Piezoelectric devices - Crystallography

摘要：We study the contribution of surface piezoelectricity to the interaction between a screw dislocation and a hexagonal piezoelectric bimaterial interface. The screw dislocation suffers a finite discontinuity in the displacement and in the electric potential across the slip plane, and meanwhile is subjected to a line force and a line charge at its core. The surface piezoelectricity is incorporated by using an extended version of the continuum-based surface/interface model of Gurtin and Murdoch. An elementary solution in terms of the exponential integral is obtained. In addition, we present an explicit and concise expression of the image force acting on the piezoelectric screw dislocation. Several special cases are discussed in detail to demonstrate and validate the obtained solution. The associated problem of a piezoelectric screw dislocation interacting with a circular inclusion with surface piezoelectricity is also solved. The dislocation can be located either in the surrounding matrix or in the circular inclusion.