压电螺型位错与含界面裂纹椭圆夹杂的干涉效应

运用求解复杂多连通域问题的复变函数方法，获得了压电螺型位错与含界面裂纹椭圆夹杂的干涉问题，复势函数的精确级数形式解。利用广义Peach-Koehler公式导出作用于螺型位错的位错力公式。分析结果表明，当裂纹的曲率或长度达到临界值，界面裂纹的存在会改变压电螺型位错与椭圆夹杂的干涉性质。

Electroelastic Interaction Between a Piezoelectric Screw Dislocation and an Elliptical Inclusion With Interfacial Cracks

The electroelastic interaction between a piezoelectric screw dislocation and an elliptical inclusion with interfacial cracks is dealt with. A complex variable method for complex multiply connected region is developed, in terms of which general solutions of complex potentials in the matrix and the inclusion regions are derived. The explicit series - form solutions are then given for the interface with a finite crack. The image force is calc~ated by using the generalized Peach - Koehler formula. Nunrerical examples show, when the curvature or the length of the crack goes upto a critical value, the existence of the interfacial crack can change the interaction mechanism.