Dynamical Response Of Porous Materials

In this paper, dynamical response of half-space saturated porous materials under interior harmonic pressure and temperature is discussed.According to the modified Biot thermo-elastic constitutive equations, we get the thermo-hydro-mechanical coupled governing equations in saturated porous materials. With the help of Hankel-transformation and its numerical inverse transformation, we get the numerical results of the dynamical responses under harmonic interior mechanical and thermal loads. Besides, dynamical responses of half-space porous materials under interior mechanical loads and surface thermal loads are obtained. The differences in the continuous thermo-elastic materials and porous materials under the same loads are compared. The differences in porous materials caused by different surface thermal boundary conditions are analyzed in this paper. The numerical results show: pore pressure becomes negative at some depths. Vertical, radical and tangential stress changed dramatically at the face where mechanical loads applied. And positive stress appears at some certain depth. The temperature almost has no effect on other response if there is no extra heat source. The value of pore pressure when surface is insulated is less than that when surface is thermostatic.