Study on the model of hot-spot ignition based on friction generated heat on the microcrack face

Lou Jian-feng; Zhang Yan-geng; Hong Tao; Zhou Ting-ting; Guo Shao-dong

doi:10.11883/1001-1455(2015)06-0807-05

Volume 35 Issue 6

Nov. 2015

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Lou Jian-feng, Zhang Yan-geng, Hong Tao, Zhou Ting-ting, Guo Shao-dong. Study on the model of hot-spot ignition based on friction generated heat on the microcrack face[J]. Explosion And Shock Waves, 2015, 35(6): 807-811. doi: 10.11883/1001-1455(2015)06-0807-05

Citation:

Lou Jian-feng, Zhang Yan-geng, Hong Tao, Zhou Ting-ting, Guo Shao-dong. Study on the model of hot-spot ignition based on friction generated heat on the microcrack face[J]. Explosion And Shock Waves, 2015, 35(6): 807-811. doi: 10.11883/1001-1455(2015)06-0807-05

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Study on the model of hot-spot ignition based on friction generated heat on the microcrack face

doi: 10.11883/1001-1455(2015)06-0807-05

Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

Received Date: 2014-04-22
Rev Recd Date: 2014-07-24
Publish Date: 2015-12-10

Abstract

Abstract

A hot-spot ignition model based on friction generated heat on microcrack face was established. In this model, the heat conduction equation including chemical reaction and friction was solved by implicit finite element method. Furthermore, the latent heat resulting from particle melting was also taken into account in this model. The effects of such key parameters hot-spot size, strain rate, and interface pressure on explosive ignition were detected and analyzed in detail. It is found that the temperature of the hot-spot rises more quickly and the response occurs earlier in time with the increase of the hot-spot size. The accumulation of heat is faster and the explosive is more likely to be ignited where the strain rate is larger or the pressure is higher.
- mechanics of explosion,
- ignition model,
- FEM,
- microcrack,
- friction,
- hot-spot size,
- strain rate

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References(16)

References

[1]	Asay Blaine W. Non-shock initiation of explosives[M]. Heidelberg: Springer-Verlag, 2010: 15-18.
[2]	Bowden F P, Yoffe A D. Initiation and growth of explosives in liquids and solids[M]. Cambridge: Cambridge University Press, 1952.
[3]	Bowden F P, Yoffe A D. Hot spots on rubbing surfaces and the detonation of explosives by friction[J]. Proceedings of the Royal Society of London, Series A: Mathematical & Physical Sciences, 1947, 188(10): 329-349. doi: 10.1098/rspa.1947.0012
[4]	Amosov A P, Bostandzhiyan S A, Kozlov V S. Ignition of solid explosives by the heat of dry friction[J]. Fizika Goreniya i Vzryva, 1972, 8(3): 362-368. http://www.onacademic.com/detail/journal_1000034907003910_0866.html
[5]	Amosov A P, Bostandzhiyan S A, Kozlov V S, et al. Mechanism of heating up and ignition of solid explosives due to external friction as a result of mechanical stimulations[J]. Fizika Goreniya i Vzryva, 1976, 12(5): 699-703. doi: 10.1007/BF00743166
[6]	Wiegand D A, Redingius B, Ellis K, et al. Pressure and friction dependent mechanical strength-cracks and plastic flow[J]. International Journal of Solids and Structures, 2011, 48(11/12): 1617-1629. http://www.sciencedirect.com/science/article/pii/S0020768311000424
[7]	Wiegand D A, Redingius B, Ellis K, et al. Evidence for fricgtion between crack surfaces during deformation of dcomposite plastic bonded explosives[C]∥Elert M L, Buttle W T, Furnish M D, et al. Proceedings of Shock Compression of Condensed Matter-2009. Nashville, Tennessee, 2009: 349-352.
[8]	Wiegand D A, Redingius B. The role of friction in the mechanical failure properties of a polymer particulate composite[C]∥APS March Meeting. New Orleans, 2008.
[9]	陈文.高速侵彻条件下战斗部装药安全性研究[D].北京: 北京理工大学, 2009.
[10]	Boyle V, Frey R, Blake O. Combined pressure shear ignition of explosive[C]∥Lee E L, Short J M. Proceedings of the 9th International Detonation Symposium. Oregon, Portland, 1989: 3-17.
[11]	Frey R B. The initiation of explosive charges by rapid shear[C]∥Proceedings of the 7th International Detonation Symposium. Annapolis, Maryland, 1981: 36-42.
[12]	Dienes J K. A unified theory of flow, hot spots, and fragmentation with an application to explosive sensitivity[M]. New York: Springer, 1996: 366-398.
[13]	Dienes J K, Kershner J D. Multiple-shock initiation via statistical crack mechanics[C]∥Short J M, Kennedy J E. Proceeding of the 11th International Detonation Symposium. Snowmass, Colorado, 1998: 717-724.
[14]	Dienes J K, Kershner J D. Crack dynamics and explosive burn via generalized coordinates[J]. Journal of Computer-Aided Materials Design, 2000, 7(3): 217-237. doi: 10.1023/A:1011874909560
[15]	Bennett J G, Haberman K S, Johnson J N, et al. A constitutive model for the non-shock ignition and mechanical response of high explosives[J]. Journal of Mechanical Physical Solids, 1998, 46(12): 2303-2322. doi: 10.1016/S0022-5096(98)00011-8
[16]	Linan A, Williams F A. Theory of ignition of a reactive solid by constant energy flux[J]. Combustion Science and Technology, 1971, 3(2): 91-98. doi: 10.1080/00102207108952276