| Numerical Analysis on Penetration Reduction of a WHA Penetrator by an Impact of Linear Explosively Formed Penetrator(LEFP) |
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Jaehyun Joo, Joonhong Choi, ManHoi Koo, Dongkyu Kim |
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The 5th Research and Development Institute, Agency for Defense Development |
| 선형폭발성형탄(LEFP) 충격에 의한 WHA 관통자의 관통성능 감소에 관한 수치해석 연구 |
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주재현, 최준홍, 구만회, 김동규 |
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국방과학연구소 제5기술연구본부 |
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| Abstract |
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A linear explosively formed penetrator(LEFP) is a modification of the explosively formed penetrator(EFP). An EFP is axisymmetric and has a dish-shaped liner while LEFP has a rectangular-shaped liner with curved cross section. Upon detonating LEFP forms laterally wide projectile like blade, leaving a long penetration hole on the target. On the other hand, a long-rod tungsten heavy alloy(WHA) penetrator is one of the major threats against most of the ground armored vehicles. In this paper, the feasibility of using an LEFP in protecting against a long-rod WHA penetrator by colliding LEFP into the threat was investigated through a set of numerical simulations. In this study, a scale-down WHA penetrator with length to diameter ratio(L/D) of 10.7 and 7.0 mm diameter was used to represent a long-rod WHA penetrator. LS-DYNA and Multi-Material ALE technique were employed for the simulation. For estimation of the protection effect by LEFP, residual penetration depths into RHA by the threat were compared according to various impact locations against the threat. |
| Key Words:
Linear Explosively Formed Penetrator, WHA penetrator, LS-DYNA |
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