Author(s)

H. Miyoshi, H. Ohba, H. Kitamura, T. Inoue & T. Hiroe

Abstract

Experiments and simulations of linear shaped charges (LSCs) have been conducted to improve the penetration performance and minimize collateral damage by fragments. Annealed tough pitch copper was selected for an appropriate liner material. The penetration depth increased by 50 %, compared to current LSCs. The detonation effects of the explosive change the liner into the jet and slug. But, the case is also transformed into fragments, which creates undesirable collateral damage. Polyvinyl chloride was adopted as the case material to reduce damage by fragments. No fragments were generated when the newly-designed LSCs were shot. For the simulation of the jet formation and target penetration, the Euler solver of AUTODYN on the two-dimension planar was selected, and the liner, case and explosive were filled on the Euler solver plane. The calculation results gave us significant information about determining the optimal stand-off distance and allow us to design effective cutting plans for use with LSCs. Keywords: linear shaped charges, target penetration, stand-off distance, Euler solver. 1 Introduction Liner shaped charges (LSCs) have the ability for the instantaneous cutting of the structures and have been used in the separation of the first and second stages, and the command destruction of solid rocket boosters (SRB) in the H-2A rocket. In the field of the military, LSCs are used the separation of the capsule in the anti-

Keywords

linear shaped charges, target penetration, stand-off distance, Euler solver.