Killing Effect of a Typical 7.62 mm Sniper Bullet on Live Target
To study the killing effect of typical 7.62 mm sniper bullet on live targets at different distances,a numerical computational model is constructed using adaptive smoothed particle hydrodynamics ( ASPH) method to obtain the sizes of temporary cavities caused by the bullets on ballistic gelatin at different distances and validated with the corresponding experimental results. The severity of damage that a sniper bullet may cause when it hits the human chest at 200 m,400 m and 800 m is obtained based on the self-developed human vulnerability assessment software. The results show that the ASPH method is suitable for solving large penetration deformation problems with a balance between computational accuracy and efficiency,the bullet with a larger angle of attack rolls earlier in the gelatin at the same penetration velocity and is subjected to greater acceleration forces,and the target thickness also has an important influence on the motion and killing effect of bullet. The size of instantaneous cavity caused by 7. 62 mm sniper bullet is 1.14 and 1.44 times larger than those at 400 m and 800 m,respectively,at 2° angle of attack. The peak acceleration of the initial phase of penetration of 7.62 mm sniper bullet at 200 m is 1.63 and 3.8 times higher than those at 400 m and 800 m,respectively,at 2° angle of attack. When the upper right side of humman xiphoid process is hitted at 200 m,400 m and 800 m,the MAIS injury scores are 6 ( fatal),5 ( critical injury),and 4 ( severe),and the NISS scores are 75,57,and 48,respectively,and the probability of death decreases from 96.8％ to 60.3％ with the increase of hitting distance.
万方数据
维普
