Abstract

The results of experimental studies and numerical simulation of the fragmentation of aluminum alloy projectiles on a tungsten mesh bumper at impact velocities of up to 7 km/s are presented. The projectiles are accelerated by a two-stage light-gas gun. X-ray photography is used to observe the state of a projectile before its impact on the mesh bumper and the process of its fragmentation. The parameters of the cloud of fragments of the projectile are recorded using a thick witness plate made of AMg6 alloy placed behind the mesh bumper. Numerical simulation is performed by the smoothed particle hydrodynamic (SPH) method. Specific features of the morphology of the cloud of fragments are pointed out, and the velocities of the fragments in different parts of the cloud, as well as the arising cumulative effect, are estimated. The experimental results are compared with the results of numerical simulation.

中文翻译：

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速度高达7 km / s的重网格上球形铝弹的破碎研究

摘要

给出了在冲击速度高达7 km / s的情况下，铝合金弹丸在钨丝网保险杠上破碎的实验研究结果和数值模拟结果。弹丸由两级轻气枪加速。X射线摄影用于观察弹丸对网状保险杠的撞击及其破碎过程之前的状态。弹丸碎片云的参数是使用由网格保险杠后面的AMg6合金制成的厚见证板记录的。数值模拟是通过平滑粒子流体动力学（SPH）方法执行的。指出了碎片云形态的特定特征，并估算了碎片在云的不同部分的速度以及由此产生的累积效应。