High and low velocity detonation in a highly insensitive explosive

18th APS-SCCM; 24th AIRAPT

Sandusky, H.W.^1 ; Hayden, H.F.^1

Naval Surface Warfare Center, IHEODTD, Indian Head

MD

20640, United States^1

关键词: Critical diameter;    Gap tests;    High velocity;    Insensitive explosives;    Low velocities;    Reduced velocity;    Sample diameter;    Solid explosives;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/18/182037/pdf
DOI  :  10.1088/1742-6596/500/18/182037

来源: IOP

【 摘 要 】

Low-velocity detonation (LVD) in a solid explosive from input shocks below the threshold for high-velocity detonation (HVD) had been previously reported for PBXN-109 in two gap tests with sample diameters of 36.5 and 73.0 mm. Similar phenomenon has now been observed for the highly insensitive PBXIH-140, whose critical diameter of ∼100 mm required an even larger gap test with a sample diameter of 178 mm. When just exceeding the critical gap for HVD, LVD propagated at similar velocities as in PBXN-109 and would punch clean holes in a witness plate like HVD. For somewhat greater gaps, there was enough shock reaction to drive LVD at constant but reduced velocities as the input shock decreased to ∼ 1/2 of critical. With a different formulation now exhibiting LVD, it may be more prevalent than previously realized. It is speculated to occur in various confinements when small percentages of easily detonable ingredients fail to initiate the remainder of less shock sensitive ingredients.