含能材料防护屏在球形弹丸超高速撞击下的穿孔特性研究
Perforation Characteristics of Energetic Material Shield Induced by Hypervelocity Impact of Spherical Projectile
查看参考文献17篇
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文摘
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以空间碎片防护设计为工程应用背景,将亚稳态含能材料应用于空间碎片防护结构。利用二级轻气炮对聚四氟乙烯/铝(PTFE/Al)含能材料防护结构进行了不同面密度、不同弹丸直径、不同速度的超高速撞击实验,获得了撞击过程中的高速摄像图片及光学高温计信号。分析结果表明,含能材料防护屏超高速撞击瞬间发生了可靠的冲击起爆反应,根据反应度的不同可分为冲击爆轰区、破碎爆燃区、零反应破碎区3个区域。基于实验结果,建立了铝合金弹丸超高速撞击PTFE/Al含能材料防护屏穿孔直径的无量纲经验公式。利用实验与分析结果验证了数值模拟的有效性,获得了环境温度对PTFE/Al含能材料防护屏超高速撞击穿孔特性的影响规律。 |
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其他语种文摘
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The metastable energetic materials were prepared for the space debris shield. Hypervelocity impact tests of PTFE/Al energetic material shield under the conditions of different areal densities, projectile diameters, and impact velocities were conducted by using two-stage light gas gun, and the high speed photographs and the signals from optical pyrometer during impacting were obtained. The analysis results show that the shock initiation of PTFE/Al energetic material shield occurs in the instant of hypervelocity impact, and the perforation process can be divided into three stages: shock detonation, fracture and deflagration, and zero reaction and crushing. A dimensionless empirical expression for perforation diameter of PTFE/Al shield is established based on the experimental results of hypervelocity impact. The effect of ambient temperature on the perforation characteristics of energetic material shield is investigated. |
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来源
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兵工学报
,2017,38(11):2126-2133 【核心库】
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DOI
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10.3969/j.issn.1000-1093.2017.11.007
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关键词
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爆炸力学
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聚四氟乙烯/铝含能材料
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超高速撞击
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穿孔过程
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穿孔直径
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地址
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1.
北京卫星环境工程研究所, 北京, 100094
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北京理工大学, 爆炸科学与技术国家重点实验室, 北京, 100081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1093 |
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学科
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力学;一般工业技术 |
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基金
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国家973计划
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文献收藏号
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CSCD:6119271
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