Theoretical and Experimental Study of Shaped Charge Jet Penetration into Frozen Soil at Different Temperatures

Abstract

To investigate the mechanical behavior of frozen soil subjected to shaped charge jet penetration at different temperatures, a combined theoretical and experimental approach was adopted. In the theoretical part, based on the dynamic cavity expansion model, the dynamic penetration resistance of frozen soil at various temperatures under high-velocity shaped charge jet impact was calculated by incorporating a constitutive model and an equation of state (EOS) for frozen soil. The calculated dynamic penetration resistance was then integrated with the axial penetration model of the shaped charge jet and the radial cavity growth model to determine the cavity profile formed by the jet penetrating frozen soil at different temperatures. The dynamic penetration resistance was subsequently validated through experiments involving a shaped charge jet penetrating frozen soil at −6 °C. The results indicate that as the temperature decreases, the dynamic penetration resistance of frozen soil increases significantly, while the diameter of the resulting cavity decreases markedly. However, no significant change is observed in the cavity depth.