Mechanics–thermotics–chemistry coupling response model and numerical simulation method for reactive liner

Aiming at describing the mechanics–thermotics–chemistry coupling response of the reactive material liner under impact loading, the Grüneisen equation of state in the form of P–V–T was derived. Combined with the impact temperature rise theory, heat conduction theory, and Arrhenius chemical reaction kinetic model, the mechanics–thermotics–chemistry coupling response model is established. A numerical simulation framework for the thermodynamic response of reactive materials under impact load was established, and numerical simulation codes for the impact-induced energy release behavior of reactive materials was developed based on the material point method, which realized the numerical simulation of the formation behavior of the reactive material penetrator (jet) under explosion load. The results show that chemical reactions occur in the process of reactive material jet formation, and high temperature and high pressure products make the jet expand and thicken constantly, resulting in the decrease in the density of the jet head and the increase in the cross-sectional area. As such, the jet has hardly any armor-piercing capability at stand-offs of 2.5 times the caliber, and the simulation results are in good agreement with the experimental results.