Abstract:

The dynamic process of bullet-gelatin interaction was studied using an FEA method. The numerical modelling was set up, and the numerical results are in good agreement with the experimental results. The penetration resistance and stress distribution of bullet in gelatin and the effect of angle of attack on gelatin damage were analyzed. The results show that penetration resistance increases slowly at narrow channel, while it increases rapidly with the rapid rolling of bullet, which leads to the fracture of the bullet. The maximum stress distribution of bullet always appears around the temporary cavity, and with the expansion of cavity the elements are stretched to beyond its elastic limit, which results in the deformation and fragmentation of gelatin. Angle of incidence has a great effect on the overturning moment of bullet, but the effect decreases with the increase in angle of attack.

Key words: ordnance science and technology, numerical simulation, ballistic gelatin, penetration, temporary cavity