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Abstract
The paper aims to study about the propagation behavior of shear horizontal type waves in a homogeneous isotropic layer sandwiched between viscous liquid layer and a microstructural substrate which is modeled using consistent couple stress theory. Consistent couple stress theory involves an additional material parameter called characteristic length of material to capture the role of internal microstructures of material. Dispersion and damping equations are calculated for the propagation of shear horizontal waves through the considered geometry using interfacial boundary conditions. The impact of various parameters such as width ratio of the layers, viscosity and density of viscous liquid layer and characteristic length parameter of consistent couple stress substrate are studied on the phase and damping velocities of shear horizontal type waves.