Initiation threshold of an insensitive underwater high explosive

Arnold, Werner
April 2000
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p911
Academic Journal
The initiation threshold of a confined insensitive high explosive (IHE) under shaped charge attack was investigated. The composition of the ammonium perchlorate (AP) containing IHE was AP / RDX / Al / binder, 40 / 24 / 24 / 12 with a density of 1.80 g/cc. This IHE was designed for underwater applications. The initiation threshold was determined by measuring the running times of the reaction wave, the shock pressures, the residual penetration performance of the shaped charge jet in RHA steel plates and the fragmentation behaviour of the steel casing of the IHE charge. The threshold was located very clearly due to the decrease of the reaction velocity and the increase in penetration performance of the jet with decreasing initiation stimulus. The v[SUP2]d value of the threshold with 170mm[SUP3]/µs[SUP2] was rather high in comparison to conventional high explosives. This high value may be correlated with the large critical diameter of 46mm of the IHE compared to the small jet diameter of only about 5mm.


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