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Interactions of inert confiners with explosives

Sharpe, G.J. and Bdzil, J.B. (2006) Interactions of inert confiners with explosives. Journal of Engineering Mathematics, 54 (3). pp. 273-298. ISSN 0022-0833

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Abstract

The deformation of an inert confiner by a steady detonation wave in an adjacent explosive is investigated for cases where the confiner is suciently strong (or the explosive suciently weak) such that the overall change in the sound speed of the inert is small. A coupling condition which relates the pressure to the deflection angle along the explosive-inert interface is determined. This includes its dependence on the thickness of the inert, for cases where the initial sound speed of the inert is less than or greater than the detonation speed in the explosive (supersonic and subsonic inert ows, respectively). The deformation of the inert is then solved by prescribing the pressure along the interface. In the supersonic case, the detonation drives a shock into the inert, subsequent to which the ow in the inert consists of alternating regions of compression and tension. In this case reverberations or `ringing' occurs along both the deflected interface and outer edge of the inert. For the subsonic case, the flow in the interior of the inert is smooth and shockless. The detonation in the explosive initially defl ects the smooth interface towards the explosive. For sufficiently thick inerts in such cases, it appears that the deflection of the confiner would either drive the detonation speed in the explosive up to the sound speed of the inert or drive a precursor wave ahead of the detonation in the explosive. Transonic cases, where the inert sound speed is close to the detonation speed, are also considered. It is shown that the confinement affect of the inert on the detonation is enhanced as sonic conditions are approached from either side.

Item Type: Article
Copyright, Publisher and Additional Information: © Springer 2006. This is an author produced version of a paper published in 'Journal of Engineering Mathematics'. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Detonation, explosives, shock waves, transonic
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds)
Depositing User: Mrs Fiona Slade
Date Deposited: 24 Feb 2009 17:59
Last Modified: 08 Feb 2013 17:06
Published Version: http://dx.doi.org/10.1007/s10665-005-9025-y
Status: Published
Publisher: Springer Verlag
Refereed: Yes
Identification Number: 10.1007/s10665-005-9025-y
URI: http://eprints.whiterose.ac.uk/id/eprint/7895

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