Study on the energy release rule of sniper projectile penetrating soft protective target

Abstract

In order to investigate the penetrating mechanism of one sniper bullet against the gelatin target with soft armor under the condition of low speed, using gelatin as the imitation of biological targets, the energy release and transfer law were paid more attention. First of all the ultimate penetration velocity of the sniper projectile penetrating soft protection was carried out, with the ultimate penetration velocity was obtained, experiments and numerical simulation were carried out on the impact of the sniper projectile to soft protective gelatin below the velocity. The simulation results and test results were compared with the sniper projectile deformation and penetration of soft protective layer, gelatin bulging size, verified the accuracy of the numerical simulation. Thus further analysis with the result of numerical simulation, the stress, energy transfer and energy changes of soft protective gelatin penetrated by sniper projectile under non-penetrating conditions were analyzed, and the absorb energy law and the energy dissipation law of soft protective and gelatin in the process were obtained. The results showed that the main reason for the energy dissipation was bullet deformation. Under direct penetrating conditions, the energy of soft protective and gelatin increased with the increase of velocity, while the energy dissipation of sniper projectile also increased. The larger the penetration angle, the energy absorption of gelatin decreases with the increase of the penetration angle, energy dissipation of sniper projectile and energy absorption of soft protective were increased. The results can provide technical guidance for bullet design and individual soldier protection design.