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

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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

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