弹丸被甲材料对弹丸挤进的影响分析

为研究弹丸被甲材料对挤进过程的影响，以某小口径步枪弹为对象进行研究。分析弹丸材料的特性，分 别以H90 铜被甲弹和覆铜钢被甲弹为例进行挤进试验，得到不同弹药对应的挤进力变化；通过有限元仿真模型，结 合试验结果推导挤进过程数学模型，并对其正确性进行验证。验证结果表明，挤进数值分析结果与仿真结果与实验 数据吻合。从分析计算结果来看，被甲材料的不同导致挤进过程也有较大差异。

Influence Analysis of Bullet Shell Material on Projectile Extrusion

Research on certain type small caliber rifle for studying the effect of projectiles on the extrusion process. The extrusion test of H90 copper beaded and copper-clad steel was taken as an example to analyze the properties of projectile materials, and get the extrusion force change corresponding of different ammunition. Using the finite element simulation model, combined with the test results, the mathematical model of the extrusion process is derived and its correctness is verified. The verification results show that the numerical analysis results and the simulation results agree with the experimental data. Judging from the results of the analysis and calculation, the difference in the material of the bullet shell causes a large difference in the extrusion process.