活性药型罩聚能装药侵彻爆燃试验及耦合作用机理分析

To investigate the penetration-deflagration behaviors and coupling mechanism of fluoropolymers based reactive liner shaped charge against steel target, the damage experiment of 73. 5% PTFE (Polytetrafluoroethylene) /26. 5% Al reactive liner shaped charge impacting the steel target is carried out, and the effects of stand-off on the penetration depth, penetration aperture, and burst behaviors of the steel target are obtained. The results show that the coupling damage effect of penetration and burst of reactive liner shaped charge on the steel target is most significant when the stand-off is in the range of 0. 35CD ~1. 00CD. On this basis, combining the theory of quasi-steady incompressible fluid mechanics, a function between the penetration depth and reaction delay of the reactive jet is given by introducing the reaction delay, and the effective mass model of the reactive jet inside the penetration hole is further developed. Based on the modified Bernoulli equation, combining the interior explosion characteristics of the reactive jet, a theoretical model for the reactive jet's penetration aperture diameter is developed. Using the cylinder failure theory, a method for judging the burst behaviors of a steel target under the coupling damage effect of penetration and burst of the reactive jet is proposed. The theoretical model quantitatively describes the coupling damage the reactive jet causes to the steel target and reveals the mechanism for the expansion of the hole and burst of the steel target caused by overpressure after the armor penetration is terminated.