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Rayleigh-type waves are investigated in a layered model composed of thermoelastic medium with double porosity structure. Using appropriate boundary conditions, the dispersion relation is obtained, which provides multi-modes, dispersive and attenuating nature of Rayleigh-type waves. This dispersion relation reduces to the dispersion equation of Stoneley-type waves, when the thickness of the overlying layer is assumed to be large enough. Some new results along with earlier known ones are reduced from the present formulation. For a particular model, the phase speed and corresponding attenuation coefficient of Rayleigh-type waves are found to be affected by the presence of thermal, pores and layer thickness. Displacements and stresses generated by the fundamental mode are also depicted graphically.

Surface waves in layered thermoelastic medium with double porosity structure: Rayleigh and Stoneley waves