A three‐phase soil model for simulating stress wave propagation due to blast loading

Abstract

SUMMARYA 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.

The response of quadrangular plates to buried charges

“…Sand is often described as consisting of three different materials, namely sand grains (solid particles), air and water. Wang [39] describes the structure of sand as a skeleton consisting of solid particles (of different sizes & shapes), with the voids in between these particles consisting of air and/or water.…”

A Model to Predict Strain Rate Dependency of Dry Silica Sand in Triaxial Compression

“…Other constitutive models related to rate dependency have been developed based on the aforementioned formulations including the three-phase equation-of-state (EOS) described by Wang et al [35], Laine and Sandvik [36] and Tong and Tuan [37]. EOS soil models take into account the different compressibilities of the solid, water and air phases of soil.…”

Numerical Analysis of the Dynamic Response of Slope under the Blasting Vibration Effect

“…The boundaries were set as non-reflective boundary simulations blasting in an infinite area. The explosives were rectangular C-4 with a weight of 5 pounds (2,200g) and a density of 1.601 g/cm 3 . The dimensions of the explosives were 10×5×28(cm).…”

“…The blast-induced shock waves in the air compress the land surface (known as soil compressive waves), which consequently converts into elastic seismic waves. Therefore, during surface blasts, both types of blast waves can be measured inside the soil [3]. That the air blast near the explosion point is fast and strong, and the velocity and strength of corresponding soil compressive waves consequently increased.…”