Dislocation interacting with collinear rigid lines in piezoelectric media

The electro-elastic interaction between a piezoelectric dislocation and collinear rigid lines embedded in a piezoelectric medium is studied in the framework of linear elastic theory.The rigid lines are considered, respectively, as dielectrics or conductors.We present a general solution of the problem based on the extended Stroh's formalism.Explicit expressions of the field intensity factors are obtained for the special case of a single rigid line.The image force acting on the piezoelectric dislocation due to the presence of a single rigid line is calculated by using the generalized Peach-Koehler formula.Numerical examples show the shielding effects of field intensity factors and image force on the dislocation.The solution we present can be served as a Green's function for investigating the micro-crack initiation mechanism at the tip of a rigid line.