压电螺位错与椭圆夹杂的电弹相互作用  

On the Electroelastic Interaction of a Piezoelectric Screw Dislocation With an Elliptical Inclusion in Piezoelectric Materials

作　　者：刘金喜[1] 姜稚清[1] 冯文杰[1] 

机构地区：[1]石家庄铁道学院力学与工程科学系,石家庄050043

出　　处：《应用数学和力学》2000年第11期1185-1190,共6页Applied Mathematics and Mechanics

摘　　要：研究了压电材料中压电螺位错与椭圆夹杂的电弹相互作用·　基于扰动概念和级数展开方法 ,推导了基体和夹杂的弹性场和电场 ,在此基础上给出了作用于位错上像力的表达式·　通过分析基体与夹杂的相对刚度和机电耦合强弱对像力的影响 ,得到了新的相互作用机理·The electroelastic interaction of a piezoelectric screw dislocation with an elliptical inclusion in piezoelectric materials is considered. The electroelastic fields in both the matrix and the inclusion were given explicitly by using the perturbation concept and the method of Laurent series expansion. Furthermore, the expressions of the image force acting on a piezoelectric screw disolcation were obtained. Numerical examples are provided to reveal the effect of piezoelectricity and the relative stiffness between the inclusion and the matrix on the image force. Consequently, the new interaction mechanism is found.

关 键 词：压电材料 压电螺位错 相对刚度 相互作用 椭圆夹杂 

分 类 号：TM22[一般工业技术—材料科学与工程] O343.7[电气工程—电工理论与新技术]