A moving mode-III crack at the interface between two dissimilar piezoelectric materials

A moving mode-III crack at the interface between two dissimilar piezoelectric materials is considered. The integral representation of a general solution is given in terms of Fourier consine integrals. Solving the system of dual integral equations derived from the mixed boundary value problem considered, the elastic and electric fields are obtained for a moving impermeable crack and for a moving crack where the electric displacement is continuous across the crack surfaces, respectively. The results obtained show that the singularity of all the field variables depends on the remote mechanical loading as well as electric loading for the former, while it depends only on the remote mechanical loading for the latter. Unlike a stationary impermeable crack, the remote electric loading or electric field can disturb the stress field for a moving impermeable crack. (C) 2000 Elsevier Science Ltd. All rights reserved.