Coupled Rayleigh waves in a 2-mm piezoelectric layer over a porous piezo-thermoelastic half-space

Propagation of coupled Rayleigh-type waves in a 2-mm piezoelectric layer over a porous piezo-thermoelastic half-space is investigated in this paper. The governing equations for an orthorhombic porous piezo-thermoelastic half-space and 2-mm piezoelectric layer are discussed. The dispersion relations have been numerically derived. The phase velocities of Rayleigh waves are obtained for different types of electric–thermal boundary conditions at the interface and at the free surface. The variations of mechanical displacements, electric potential and temperature component with the non-dimensional wave number are obtained. The effects of different electric–thermal boundary conditions on the phase velocity have also been discussed. The dispersion curves and attenuation coefficients of wave propagation are presented graphically. Some reduced cases are also discussed.