| Autor: |
Sandusky, H. W., Church, S. R., Felts, J. E. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2018, Vol. 1979 Issue 1, p100036-1-100036-4, 4p |
| Abstrakt: |
At or above the critical pressure for shock-to-detonation transition (SDT), there is usually a run up in shock velocity before a distinct change to high-velocity detonation (HVD). If below that critical pressure a slower supersonic wave will sometimes steadily propagate with enough energy to punch a witness plate. This low-velocity detonation (LVD) has been observed for sample diameters ranging from 36.5 mm in the large scale gap test to 177.8 mm in the super large scale gap test (SLSGT). Recent SLSGTs on an extremely insensitive explosive with a ~120 mm critical diameter exhibited HVD without SDT only for no gap and LVD when above the critical pressure, not below it as previously observed. The reactive shocks associated with LVD commenced from the donor input and continued steadily, and even with partial reaction had sufficient energy to cleanly punch witness plates. Traditional GO/NOGO determinations that distinguished between HVD and reaction failure do not apply for extremely shock insensitive materials that require evaluation with the largest of the standardized tests, which has implications for both hazard classification and booster requirements. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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