The potential of rubber materials as an inhibitor to suppress jet formation of the shaped charge warhead

In this paper, as a measure to protect shaped charge, NBR whch is a hyperelastic material, was considered as a target material into which a shaped charge warhead having relatively high speed was impacted. During impact, to what extent NBR can infiltrate into the liner cavity of shaped charge was numerically investigated. The Ogden model combined with the relaxation modulus for NBR was applied in LS-DYNA analysis for the collision between shaped charge and NBR. As a result, the maximum infiltration depth by NBR into the liner cavity was investigated upon the shaped charge stop. The inhibitory effect of the infiltration depth by NBR on jet formation was examined through numerical simulation for jet formation using 2D axisymmetric ALE technique. It was verified from the flash X-ray experiment where a silicone rubber having similar hardness with NBR was used as an inhibitor against jet formation.