| 机械冲击载荷下固体推进剂热点微观模型探讨 |
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| 引用本文： | 陈广南.机械冲击载荷下固体推进剂热点微观模型探讨[J].固体火箭技术,2004,27(1):37-40. |
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| 作者姓名： | 陈广南 |
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| 作者单位： | 国防科技大学航天与材料工程学院,长沙,410073 |
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| 摘 要： | 分析了推进剂内部初始裂纹在机械冲击载荷作用下的扩展以及与反应气体产物相互作用。利用Ⅰ、Ⅱ型裂纹扩展、推进剂分解化学动力学模型，建立微观热点模型，研究了裂纹面摩擦、推进剂分解以及裂纹内部气相反应等微观过程。进行数值模拟计算，得出了推进剂产生高温热点或导致冲击点燃的外部条件。认为裂纹间摩擦和气相产物在高速冲击下压缩可导致推进荆热点产生。
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| 关 键 词： | 机械冲击载荷 固体推进剂 热点微观模型 裂纹扩展 |
| 文章编号： | 1006-2793(2004)01-0037-04 |
| 修稿时间： | 2003年7月1日 |
Microscale hotspot model of solid propellant under mechanical impact |
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| CHEN Guang-nan//Inst. of Aerospace and Material Engineering,National Univ. of Defence Technology,Changsha,China..Microscale hotspot model of solid propellant under mechanical impact[J].Journal of Solid Rocket Technology,2004,27(1):37-40. |
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| Authors: | CHEN Guang-nan//Inst of Aerospace and Material Engineering National Univ of Defence Technology Changsha China |
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| Institution: | CHEN Guang-nan//Inst. of Aerospace and Material Engineering,National Univ. of Defence Technology,Changsha410073,China. |
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| Abstract: | Based on the analysis of propagation of initial micro-cracks of solid propellant under mechanical impact and its interaction with the gas phase product, an micro-scale hotspot model is proposed to investigate the friction process between crack surfaces, thermal decomposition of solid propellant and reaction of gas phase products enclosed in crack. Numerical simulation computation was conducted and the external conditions leading to hotspot of high temperature or the possible ignition of solid propellant were determined. It is believed that the friction between crack surfaces and high speed compression of gas phase product can result in the formation of hotspots. |
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| Keywords: | solid propellants propellant stability microcracks crack propagation |
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