Stresses Induced by a Moving Load in a Composite Structure with an Incompressible Poroviscoelastic Layer

Abstract

An investigation concerned with the dynamic response of a composite structure to a moving load on its uppermost rough surface has been carried out analytically. The composite structure is comprised of an incompressible fluid-saturated transversely isotropic poroviscoelastic layer of finite width imperfectly bonded with an underlying transversely isotropic viscoelastic semi-infinite medium. Closed-form expressions of induced stresses (shear and normal) and induced pore pressure are established analytically using the appropriate boundary conditions. The established results are validated with the preestablished results. The substantial effects of influencing parameters—porosity; frictional coefficient; shear and transverse imperfection (bonding) parameters; shear viscosity, volume viscosity, and extensional viscosity parameters; and the vertical depth (from the free surface) of the medium—on the induced stresses (shear and normal) of the layer and semi-infinite medium and the induced pore pressure of the layer of the considered composite structure are demonstrated graphically through numerical computation. Moreover, a comparative examination of distinct cases of the problem serves as the salient feature of the study and contributes better analysis than found in the literature.