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含能材料  2010 

RDX晶体特性对冲击感度的影响规律

DOI: 10.3969/j.issn.1006-9941.2010.05.002

Keywords: 爆炸力学,RDX,晶体特性,冲击感度,撞击感度

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Abstract:

采用标准隔板和落锤撞击试验方法分别研究了RDX的晶体内部空隙(用晶体表观密度表征)、颗粒度和形貌对包括冲击波感度和撞击感度在内的冲击感度的影响规律。冲击波感度测试采用隔板试验,药柱配方为RDX/食用油(质量比为76/24),药柱采用液体填充方式制备。隔板试验研究表明:随着RDX晶体表观密度在1.7961~1.7983g·cm-3范围内增加,炸药配方的冲击波感度降低,隔板厚度从14mm降到12.2mm,晶体表观密度与隔板厚度基本成线性关系;当晶体表观密度为1.7976g·cm-3时,在50~600μm粒度范围内,随着颗粒度的增加,RDX炸药配方的冲击波感度降低,隔板厚度从13.5mm降到12.3mm;当晶体表观密度和颗粒度相近时,晶体颗粒的外观形貌对炸药冲击波感度影响不大。落锤撞击试验表明:RDX颗粒度对撞击感度影响较大,当平均颗粒直径在16.7~337.9μm范围时,随着粒径的增加,特性落高从75cm降到35.8cm,颗粒越大撞击感度越高;当颗粒度相近时,在1.7961~1.7983g·cm-3范围内,RDX晶体表观密度对撞击感度几乎无影响。

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