Damage Behavior of a Truncated-Cone Concrete Target Under Coupled Reactive-Jet Penetration and Deflagration

To investigate the damage behavior of a truncated-cone concrete target (TCCT) under the coupled action of reactive-jet penetration and deflagration, full-scale experiments were conducted to characterize the damage induced in the TCCT by different reactive shaped charge liner (RSCL) structures. The results show that, under the coupled action of reactive-jet penetration and deflagration, the TCCT exhibits a damage mode characterized by upper crushing and lower fracture, which is significantly affected by the RSCL structure. Based on a combined analysis of a segmented numerical simulation method for reactive-jet penetration and deflagration and the full-scale experimental results, the gain relationship between the residual mass of the reactive jet and the deflagration enhancement effect was revealed. The study shows that the internal damage of the concrete target is mainly caused by compressive waves, whereas the damage to the bottom and sidewalls is mainly caused by tensile waves reflected from the walls. The deflagration enhancement effect of the reactive jet is positively correlated with its residual mass. On average, the deflagration enhancement increased the final damaged depth and the fully damaged cross-sectional area of the TCCT by 33.4% and 117.4%, respectively.