Effect of periodic corrugation on Lamb wave propagation in PMN-PT single crystal bilayer plates.

Propagation characteristics of Lamb waves in a bilayer plate comprised of a PMN-PT single crystal layer and an elastic layer were investigated in this study. The profiles of the bilayer plate's upper and lower surfaces and the common interface between the PMN-PT and elastic layers were assumed to be periodic corrugation instead of perfect planes. The PMN-PT single crystal was poled along the [0 1 1] direction with macroscopic symmetry of orthonormal mm2.