爆炸成型弹丸侵彻钢靶的后效破片云实验研究

A series experiments that the explosively-formed projectiles (EFPs) penetrate 10-40 mm-thick mild carbon steel (45# steel) were designed to investigate the effect of behind armor debris(BAD) after EFP penetrating into steel target. The morphology and scattering characteristics of BAD are observed by pulsed X-ray photography, and the number and damage ability of BAD are obtained by measuring the perforation on witness target. It can be seen from the pulsed X-ray photographs that the shape of BAD presented as fragments is of partial ellipse with the scattering angle of about 50°. The perforation on witness plate shows that BAD could penetrate 10mm-thick aluminum plate, the perforation distribution is relatively random, and the diameter of hole on witness plate approximately conform to normal distribution. The scattering angle varies little with the increase in the target thickness, while the number of BAD increases first and then decreases, namely there is a target thickness that maximizes the number of BAD. It can also be seen from recovered fragments that EFP and steel target debris together constitute the BAD.