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arXiv · 1005.0046

Critical velocities for deflagration and detonation triggered by voids in a REBO high explosive

S. Davis Herring·Timothy C. Germann·Niels Grønbech-Jensen
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Abstract

The effects of circular voids on the shock sensitivity of a two-dimensional model high explosive crystal are considered. We simulate a piston impact using molecular dynamics simulations with a Reactive Empirical Bond Order (REBO) model potential for a sub-micron, sub-ns exothermic reaction in a diatomic molecular solid. The probability of initiating chemical reactions is found to rise more suddenly with increasing piston velocity for larger voids that collapse more deterministically. A void with radius as small as 10 nm reduces the minimum initiating velocity by a factor of 4.

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S. Davis Herring, Timothy C. Germann, Niels Grønbech-Jensen. 2010-05-05. Critical velocities for deflagration and detonation triggered by voids in a REBO high explosive. https://doi.org/10.1103/physrevb.82.214108

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