Derivation and Validation of a Material Model for Clayey Sand for Use in Landmine Detonation Computational Analyses.

摘要

A large-strain/high-deformation rate model for clay-free sand recently proposed and validated in our work has been extended to sand containing relatively small (less than 15vol.%) of clay and having various levels of saturation with water. The model includes an equation of state which represents the material response under hydrostatic pressure, a strength model which captures material behavior under elastic-plastic conditions and a failure model which defines conditions and laws for the initiation and evolution of damage/failure in the material. The model was validated by comparing the computational results associated with detonation of a landmine in clayey sand (at different levels of saturation with water) with their computational counterparts.