Rayleigh Surface Wave in a Porothermoelastic Solid Half-Space

In the present paper, a problem on the Rayleigh type surface wave at a traction free surface of a generalized porothermoelastic solid half-space is considered. The governing equations of generalized porothermoelastcity are specialized for x(1) - x(2) plane. The surface wave solutions in x(1) - x(2) plane are obtained which satisfy the required radiation conditions in porothermoelastic half-space. These solutions satisfy the boundary conditions at free surface of the half-space and a secular equation for wave speed of Rayleigh wave is obtained. The wave speed of Rayleigh wave is computed for an experimental data of water-saturated sandstone. The effects of porosity, frequency, thermal relaxation times, coefficients of thermal expansion and thermoelastic coupling are observed on the wave speed of the Rayleigh wave.