PENETRATION AND DEMOLITION COUPLING EFFECTS OF REACTIVE ROD JET AGAINST MULTILAYER CONCRETE TARGET

Through numerical simulation and experimental analysis, the study investigated the formation behavior of reactive rod jets and the coupled damage behavior of penetration and blasting on multilayer concrete targets. Based on the AUTODYN-3D numerical calculation platform, Smoothed Particle Hydrodynamics algorithm was used to study the reactive rod jet formation behavior and penetration blasting coupling damage to multilayer concrete targets with different reaction delay time. The distribution law of the density field, velocity field and temperature field of the reactive rod jet in the forming process is obtained. The results show that during the forming process, the high temperature zone of the reactive rod jet is mainly concentrated at the tail of the jet, which is more conducive to the coupling damage of reactive material penetration blasting. However, the timing effect of kinetic energy and chemical energy seriously affects the damage efficiency of the reactive rod jet to the multi-layer concrete target.