Interfacial waves in dissimilar piezoelectric cubic crystals with an imperfect bonding

This paper studies propagation of shear waves along a weak interface of two dissimilar piezoelectric cubic crystals. Two piezoelectric cubic crystals are bonded along a specified cut direction. For an imperfect electrode interface, a dispersion relation of interfacial waves is derived explicitly. Numerical solutions are evaluated for several commonly-used piezoelectric cubic crystals. Our results show that interfacial imperfection alters the velocity of the interfacial shear waves. In particular, sometimes the interfacial shear waves may not exist for a perfect grounded interface and exist only for an imperfect electrode interface.