Abstract
A three-phase soil model is proposed to simulate stress wave propagation in soil mass to blast loading. The soil is modelled as a three-phase mass that includes the solid particles, water and air. It is considered as a structure that the solid particles form a skeleton and their voids are filled with water and air. The equation of state (EOS) of the soil is derived. The elastic-plastic theory is adopted to model the constitutive relation of the soil skeleton. The damage of the soil skeleton is also modelled. The Drucker-Prager strength model including the strain rate effect is used to describe the strength of the soil skeleton. The model is implemented into a hydrocode Autodyn. The recorded results obtained by explosion tests in soil are used to validate the proposed model.
| Original language | English |
|---|---|
| Pages (from-to) | 33-56 |
| Number of pages | 24 |
| Journal | International Journal for Numerical and Analytical Methods in Geomechanics |
| Volume | 28 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2004 |
| Externally published | Yes |
Keywords
- Blast
- Constitutive model
- Shock
- Soil dynamics
- Stress wave
- Underground explosion