SH wave vibration in functionally graded porous piezoelectric composite loaded with Newtonian conductive/non-conductive liquid

Abstract

This study concentrates on the propagation pattern of shear horizontal (SH) waves on the conductive liquid-loaded porous piezoelectric media. Porous piezoelectric media is composed of fluid saturated functionally graded porous piezoelectric material (FGPPM) plate and functionally graded piezoelectric material (FGPM) half-space. The functional grading is assumed to be exponential for the FGPPM layer and quadratic for the FGPM layer respectively, along the direction of thickness. The mechanical imperfection is considered at the interface of the two media. The dispersion and the attenuation curve have been plotted to describe the impact of various parameters, namely gradient parameter of both the piezoelectric material, thickness of FGPPM plate, imperfect interface parameter, relative permittivity and conductivity of the liquid medium. Also, different modes for both the dispersion and attenuation curves have been delineated to get a better insight. Dispersion equations for non-conductive liquid loaded piezo-composite have also been obtained for both electrically open and short circuit conditions. To validate the present outcome, the geometry is reduced to special cases and the outcome is matched with pre-existing results. This article may find its application in better understanding of SAW devices incorporated with liquid layer.