Effect of surface–interface elasticity on SH-wave scattering at the interface of two piezoelectric media with initial stress

The current work investigates the reflection and refraction of SH-wave at the interface of two piezoelectric media half-spaces in the context of surface–interface elasticity. The Gurtin–Murdoch approach has been used to derive the surface–interface stress tensor. The amplitudes of the reflection and refraction waves are calculated analytically using the mechanical and electrical boundary conditions. Some special cases have been inferred to validate the current study with the existing results. The amplitude of scattered waves is determined by numerical simulations analyzing the influence of the surface–interface elasticity parameter, pre-stress, and piezoelectric coupling factors. Furthermore, amplitude ratios and energy flux relations are used to calculate the energy ratios of reflected and refracted waves, which are represented by graphs. The findings might be useful in nanomaterials and nanostructures, such as frequency shifting in sensing devices, transduction, and signal processing.