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 penetration was calculated by incorporating the constitutive model and 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 penetration cavity profile formed by jet penetration into frozen soil at different temperatures. The dynamic penetration resistance was subsequently validated through experiments on shaped charge jet penetration into frozen soil at −6 °C. The results indicated that as temperature decreases, the dynamic penetration resistance of frozen soil increases significantly, while the cavity diameter decreases markedly. However, no obvious variation was observed in cavity depth.