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http://dx.doi.org/10.9766/KIMST.2017.20.3.384

Numerical Analysis on Penetration Reduction of a WHA Penetrator by an Impact of Linear Explosively Formed Penetrator(LEFP)  

Joo, Jaehyun (The 5th Research and Development Institute, Agency for Defense Development)
Choi, Joonhong (The 5th Research and Development Institute, Agency for Defense Development)
Koo, ManHoi (The 5th Research and Development Institute, Agency for Defense Development)
Kim, Dongkyu (The 5th Research and Development Institute, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.20, no.3, 2017 , pp. 384-392 More about this Journal
Abstract
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.
Keywords
Linear Explosively Formed Penetrator; WHA penetrator; LS-DYNA;
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