不同类型装药侵彻安全性数值模拟

In order to analyze the mechanical response and damage-ignition process of typical explosive charges in projectiles during penetrating concrete targets, the combined microcrack and microvoid model (CMM) were used to investigate the compressive wave propagation, damage and temperature rise mechanism of PBX charge in penetration process. The constitutive model parameters of two kinds of explosives were calibrated. Meanwhile, the difference between two typical PBXs (pressed PBX04 and casted GOFL-5) in response to penetration process is compared. The results show that, the yield strength, hardening modulus, initial microcrack density and microcrack size of GOFL-5 are lower than those of PBX04. The damage of microcrack in the head of PBX04 is higher than that of GOFL-5 in the initial loading stage. During the whole penetration process, the most serious microcrack damage areas of the two kinds of explosives are the head and tail. Shear-crack hotspot is the dominated ignition mechanism for PBX04, and the temperature rise of GOFL-5 is lower than that of PBX04.