亚毫米颗粒侵彻肥皂靶标的空腔特征与致伤阈值

Ballistic soap is widely used in the field of wound ballistics, as an equivalent target of biological target, to observe the damage characteristics of wound channels for assessing the potential damage of ammunition. However, there is still a lack of damage standards for sub鄄millimeter particle damage elements of low collateral damage munitions to the biological targets. The dimensional analysis method is used to determine the forming characteristics of penetrating cavity, and the actual wound trajectory of soap target is obtained through the particle driving test. The evolution law of penetrating cavity of sub鄄millimeter particles is analyzed by numerical simulation, and the critical damage conditions of sub鄄millimeter particles on the soap target equivalent target are established. The conical cavity produced by sub鄄millimeter particles penetrating the soap target is represented by inlet diameter and cavity depth. The results show that the cavities caused by sub鄄millimeter particles with different densitues, sizes and velocities are significantly different, and the cavity characteristics are related to specific kinetic energy. The volume of the cavity produced by penetrating the soap target increases with the increase in the the density, size and velocity of particle material. The larger the particle size is, the deeper the penetration into the soap target is, and the inlet diameter expand to 2郾 0 - 2郾 5 times of the particle size. According to the fragment killing criteria, the injury thresholds of sub鄄millimeter particles with different particle sizes to the soap target are determined. The energy density of particle penetration should exceed 0郾 83 J / cm² to cause damage to the soap target. The numerically simulated, test and theoretically analyzed results agree well with each other, and the the influence law of penetration effect is consistent. The results can provide theoretical reference for the structural design of low collateral damage warhead and the effect evaluation.