Characteristics of Shock Initiation of Single-Shell and Double-Shell Casing Charges

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According to different type tactical missile warhead, structure of which was equivalent to charges covered by single-shell or double-shell. The shock initiation response of cast TNT charges, covered by single-shell and double-shell casing impacted by hypervelocity fragment was investigated using non-linear dynamics software AUTODYN. Results shows that in hypervelocity impact conditions, the first layer of double-shell charge imposed severe breaking effect to fragment and generated debris clouds, then the surface impulse density of fragment to rear shell reduces significantly. When impacted by same mass, shape, velocity projectile, deflagration will occur for single shell charges, however, no deflagration can be observed for double shell charges with the same thickness.

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Periodical:

Edited by:

Wu Fan

Pages:

485-491

DOI:

10.4028/www.scientific.net/AMM.110-116.485

Citation:

X. Liu et al., "Characteristics of Shock Initiation of Single-Shell and Double-Shell Casing Charges", Applied Mechanics and Materials, Vols. 110-116, pp. 485-491, 2012

Online since:

October 2011

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$35.00

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[5] W. Fickett and W. C. Davis, Detonation. Berkeley: University of California Press, 1979 (a) (b) (c) (d) Figure 3. Time histories of pressure and reaction fraction of explosive for double-shell impacted by 5mm spherical fragment, (a) time histories of reaction fraction at gauges #3 at 6km/s, 5. 2 km/s, 5. 1km/s and 5 km/s; (b), (c), (d) time histories of pressure at gauges #1~#8 at 5. 2km/s, 5. 1 km/s and 5km/s respectively. (a) (b) Figure 4. Reaction fraction distribution of cast TNT explosive with double-shell casing at t= 55, (a) at 5. 1km/s; (b) at 5. 2km/s.

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