卵形弹冲击作用下平纹织物的动态响应

Dynamic Response of Plain--woven Fabric Subjected to Ballistic Impact of Ogival Nosed Projectile

本文研究了不同入射角度下的卵形弹冲击平纹织物的动态特性，分析了织物的变形、纱线断裂以及能量吸收特性，讨论了弹丸不同入射角度对织物动态响应的影响。结果表明：在弹丸贯穿织物过程中，纱线应变能和摩擦耗散能是弹丸动能转变的主要形式。在给定的计算时间内，对于0°、15°、30°、45°、60°、75°以及80°的7种入射角条件，两者之和占弹丸动能损失量的比例不小于70．1％。模拟结果还表明，弹丸入射角对织物的变形、纱线断裂以及能量吸收特性均有影响°、入射角不同，纱线断裂数目不同，弹丸动能损失量转变成其它能量的比例也不同，导致织物的能量吸收特性也发生了变化。

The dynamic responses of plain--woven fabric under ballistic impact of ogival nosed projectile with different in- cident angles were investigated in this paper. The fabric deformation, yarns rupture and time history of energy absorption mechanism were investigated by numerical simulation analysis, and effects on the fabric dynamic responses by different inci- dent angles of the projectile were also discussed. The simulation results showed that the yarn strain energy and frictional slid- ing dissipated energy were the dominant energy transfer of kinetic energy of projectile. At a given time, for the seven incident angle conditions with 0°、 15°、 30°、 45°、 60°、 75° and 80°, the sum of yarn strain energy and frictional sliding dissipated en- ergy accounted not less than 70.1%. Simulation results also indicate that the incident angle conditions significantly affect the fabric deformation, yarns rupture and time history of energy absorption mechanism. The number of rupture yarns and the pro- portion of energy transfer in loss of projectile kinetic energy strain energy vary due to the different incident angles.