From a single grain to microstructure: How explosive grains interact under shock compression

Lawrence Salvati; Siva Kumar Valluri; Dana D. Dlott

doi:10.1063/12.0020387

From a single grain to microstructure: How explosive grains interact under shock compression

Lawrence Salvati, Siva Kumar Valluri, Dana D. Dlott

Research output: Contribution to journal › Conference article › peer-review

Abstract

We studied the effect of varying the HMX concentration in a plastic-bonded explosive (PBX) by analyzing the time-dependent thermal emission with short (4 ns) duration shocks that produced pressures of about 20 GPa. We found that the HMX tended to aggregate even at the lowest concentrations. Once the cluster size reached about 15 μm, at 30 wt.%, the cluster size started increasing more dramatically, but energy release during deflagration reached a plateau. These observations are consistent with the idea that the clusters act as a limiting factor for hot spot criticality, possibly due to heat loss mechanisms such as conduction and convection.

Original language	English (US)
Article number	290010
Journal	AIP Conference Proceedings
Volume	2844
Issue number	1
DOIs	https://doi.org/10.1063/12.0020387
State	Published - Sep 26 2023
Event	22nd Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2022 - Anaheim, United States Duration: Jul 10 2022 → Jul 15 2022

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General Physics and Astronomy

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10.1063/12.0020387

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abstract = "We studied the effect of varying the HMX concentration in a plastic-bonded explosive (PBX) by analyzing the time-dependent thermal emission with short (4 ns) duration shocks that produced pressures of about 20 GPa. We found that the HMX tended to aggregate even at the lowest concentrations. Once the cluster size reached about 15 μm, at 30 wt.%, the cluster size started increasing more dramatically, but energy release during deflagration reached a plateau. These observations are consistent with the idea that the clusters act as a limiting factor for hot spot criticality, possibly due to heat loss mechanisms such as conduction and convection.",

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AB - We studied the effect of varying the HMX concentration in a plastic-bonded explosive (PBX) by analyzing the time-dependent thermal emission with short (4 ns) duration shocks that produced pressures of about 20 GPa. We found that the HMX tended to aggregate even at the lowest concentrations. Once the cluster size reached about 15 μm, at 30 wt.%, the cluster size started increasing more dramatically, but energy release during deflagration reached a plateau. These observations are consistent with the idea that the clusters act as a limiting factor for hot spot criticality, possibly due to heat loss mechanisms such as conduction and convection.

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From a single grain to microstructure: How explosive grains interact under shock compression

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