Response of poroelastic layers to moving loads

This paper presents a study of the response of layers of fluid-filled porous elastic (poroelastic) materials to surface tractions moving at constant speed. Solutions are obtained to Biot's equations for poroelastic materials using a Fourier Transform Method. Although physical domain behavior is found using a Fast Fourier transform for numerical inversion, it is shown that the distribution of fluid flow, pressure, stress and displacement may be determined directly in the transform domain without recourse to inversion. Layer response to a moving porous indenter and to a moving fluid pressure wave is determined. The flow, pressure and stress distributions for the two cases are found to be markedly different.