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含能材料  2013 

药片剪切试验中PBX-2炸药的响应特性

DOI: 10.3969/j.issn.1006-9941.2013.06.020

Keywords: 爆炸力学,剪切试验,响应特性,落高阈值,数值计算,PBX-2炸药

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Abstract:

采用ANSYS/LS-DYNA有限元计算程序模拟设计了药片剪切试验装置,研究了Φ20mm×5mm和Φ20mm×9mm两种厚度的PBX-2药片在剪切试验中的响应特性。采用锰铜压力计测试样品中压力的变化过程,通过高速录像照片分析了撞击点火反应过程,用冲击波超压传感器测量了炸药的反应超压,综合分析了PBX-2炸药在药片剪切试验中的响应规律。结果初步表明,药片剪切试验中PBX-2炸药厚度由5mm变化至9mm,其反应落高阈值由3.5~3.7m降低为3.0~3.1m,即随着该炸药厚度增加,其反应落高阈值略有降低。

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