Interface waves on the sliding contact between identical piezoelectric crystals of general anisotropy

The theory is developed of acoustic waves guided by the perfect sliding contact between identical piezoelectric crystals. The wave propagation under two types of electric boundary conditions has been investigated: (1) non-metallized interface; (2) metallized interface. The main attention has been paid to the so-called subsonic slip waves. A number of theorems has been proved concerning the existence of such waves in structures of arbitrary symmetry. A thorough study of the existence conditions for slip waves has been carried out as applied to structures assuming certain particular orientations. The results of analytic considerations have been illustrated by numerical computations.