Abstract: This paper attempts to investigate the electro-elastic
fields excited by a moving screw dislocation near a circular cavity under
combined longitudinal shear and in-plane electric field. The expressions of
displacement, electric potential, stresses, electric displacements and image
force acting on moving dislocation are derived explicitly. The results show that
the velocity of moving dislocation has significant effect on the electro-elastic
fields and the image force. More significantly, the
-direction component of image force increase with increment of the velocity of
moving dislocation but the
-direction component of image force has the contrary tendency. The present
solutions contain previously known results as the special cases.
Keywords and phrases: piezoelectric material, circular cavity, moving screw dislocation.
