Study on the effect of two kinds of drug type covers on the forming and damage efficiency of MLEFP

DOI:	10.11809/bqzbgcxb2023.05.006
Keywords:	linear circumferential explosion forming projectiles; drug type cover structure; damage efficiency; numerical simulation
Abstract:	In order to improve the damage efficiency and interception probability of Explosive Forming Projectile (EFP), a new type of armor piercing warhead, Linear Circumferential Explosive Forming Projectile (MLEFP), is derived. In order to improve the damage efficiency of a drug type cover, this paper optimizes its structure by designing a spherical segment drug type cover with variable wall thickness and a large cone shaped drug type cover with variable wall thickness. It then uses Autodyn software to numerically simulate the forming process of the drug type covers with the two structures, and also verifies the damage ability of the large cone shaped drug type cover with variable wall thickness through experiments. The results show that under the action of the explosive load, the circumferential MLEFP charge structure can form a closed linear explosive forming projectile with a certain speed and length, which can achieve the purpose of intercepting and detonating incoming missiles at a close range as well as damaging light armors. When the cover has a large cone angle structure, its head speed is significantly higher than that of the spherical segment structure, and the damage efficiency is better.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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