Abstract
We aim to model SH wave propagation in a stratum-substrate structure comprising a piezo-poroelastic material (PPM) layer overlying a functionally graded PPM substrate. In this model, a source of disturbance of point size influences wave propagation. The model’s free surface is assumed to be coated with an infinitesimally thin layer for analyzing the mass loading sensitivity (MLS). Admissible boundary conditions are used to determine the proper Green’s functions for the layered structure components. The SH wave’s dispersion relation is obtained, which is in well-agreement with the classical result of Love wave when it is reduced to an isotropic elastic material case. For a BaTiO3-crystal layer and PZT-5 H substrate, the effects of various prevalent parameters, like functional gradient parameters and piezo-porous coupling parameter, on SH wave dispersion are illustrated by means of graphs and analyzed. Different materials such as ZnO, SiO2, Si, and PZT-2 are considered to be coated on the free surface to analyze and compare the model’s MLS.
