Abstract
In this paper, a three-phase soil model under shock loading is developed to simulate blast wave propagation in the soil mass. The soil is modeled as a three-phase mass that includes the solid particles, water and air. The solid particles form a skeleton and their void are filled with water and air. The deformation of solid particles and strain rate effect are also considered. The model is implemented into the commercial hydrodynamic software AUTODYN as its user subroutines. The numerical results of the propagation of the blast wave in two kinds of soil mass are presented, one is in saturated soil, and the other is in unsaturated soil. The results appear to be satisfactory and some characteristics of the blast wave propagation are observed.
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