不同弹头形式的易碎弹冲击航空有机玻璃的数值分析  

Numerical analysis on fragile projectile with different warheads impacting against aviation organic glass

作　　者：荣吉利[1] 诸葛迅 李健[2] 项大林[1] 林贤坤[2] 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]广西科技大学广西汽车零部件与整车技术重点实验室,广西柳州545006

出　　处：《振动与冲击》2015年第1期200-205,共6页Journal of Vibration and Shock

基　　金：广西车辆零部件先进设计制造重点实验室开放基金项目(2012KFMS01);国家自然科学基金项目资助(10972033)

摘　　要：利用霍普金森杆(SHPB)实验方法,针对由金属与硫混合而成的易碎弹复合材料及某航空有机玻璃材料,测得了不同应变率下两种材料的动态力学参数。根据实验数据拟合给出易碎弹与航空有机玻璃材料的Johnson-cook强度模型参数,并对参数进行数值仿真验证。在此基础上,利用AUTODYN-3D有限元程序,对具有不同弹头形式的易碎弹冲击航空有机玻璃全过程进行数值模拟,通过对比子弹的破碎效果及对航空有机玻璃的毁伤效果,分析总结了相关规律。结果表明:该复合材料具有较好的易碎效果;空尖易碎弹的破碎效果优于普通易碎弹,并且对航空有机玻璃的毁伤效果逊色于普通易碎弹,更加符合实际应用。Based on Hopkinson bar （SHPB ）experiments,for some aviation organic glass materials and fragile projectile composite materials made of the mixture of metal and sulfur,the dynamic mechanical parameters of the two meterials were measured under different strain rates.According to the experimental data fitting,the parameters of the Johnson-Cook intensity model of fragile projectile and aviation organic glass were obtained and verified by the use of numerical simulation.On this basis,by virtue of AUTODYN-3D finite element program,the whole impact process of the fragile projectile with different forms of warhead against aviation organic glass was numerically simulated.By inspecting the crushing effect of the projectile and the damage effect on aviation organic glass,some laws were summarized.The results show that：the composite material has good fragility effect;the crushing effect of hollow pointed fragile projectile is better than that of ordinary fragile projectile,and the damage effect on aviation organic glass of the former is less than that of the latter.The hollow pointed fragile projectile is more favourable in actual applications.

关 键 词：空尖易碎弹 航空有机玻璃 冲击 破碎 

分 类 号：TJ012.4[兵器科学与技术—兵器发射理论与技术]