子弹正面射击防弹头盔的非贯穿变形分析

子弹对头盔非贯穿性射击的变形会使头盔内表面与人体头部接触,而这种接触将会对人体头部造成伤害。为了研究这种非贯穿性损伤,将防弹头盔材料模型视为理想塑性的Johnson Cook材料模型,头盔表面曲线按照国家标准GA293-2012《警用防弹头盔及面罩》精确绘制。将子弹设置为刚性,子弹采用54式手枪7.62mm手枪弹,以450m/s的速度射击防弹头盔。仿真基于ABAQUS/Explicit分析模块进行,采用ABAQUS显示非线性动态分析,对头盔和子弹应用Abaqus自适应网格技术。结果显示,射击点离头盔顶部越远,头盔变形越大,对人体头部可能造成的伤害越大。

Non-penetrating Deformation Analysis of the Bullet Shooting the Front ofthe Bulletproof Helmet

The deformation of the bullet non-penetrating the bulletproof helmet can cause a contact between the inside of the helmet and the head. This contact can cause injury to head. In order to study the non-penetrating phenomenon, the material of the bulletproof helmet is regarded as Johnson-Cook material model of ideal plasticity. The helmet surface curve is accurately drew by reference the national standard GA293-2012 "bulletproof police helmet and mask". The bullet is set to a rigid, bullet use 54 type pistol 7.62 mm bullet, with the speed of 450 m/s shooting bulletproof helmet. The simulation analysis is based on ABAQUS/Explicit, using ABAQUS display nonlinear dynamic analysis, helmets and bullet on the application of Abaqus adaptive grid technique. The results show that shooting point further away from the top of a helmet, the more damage to head may be cause..