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

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.