Laboratory-scale techniques for the measurement of a material response to an explosive blast
Laboratory-scale techniques for the measurement of a material response to an explosive blast
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DOI：
10.1016/j.ijimpeng.2008.12.008
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发表时间：
2009-07
影响因子：
5.1
通讯作者：
M. Hargather;G. Settles
中科院分区：
文献类型：
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作者：
M. Hargather;G. Settles
在实验室尺度上进行了试验，以测量薄板在不同爆炸脉冲下的变形。实验是用已知的爆炸性物质悬浮在空气中，与夹在“冲击孔”夹具中的铝见证板保持已知距离。通过使用表征良好的PETN和TATP炸药装药，先验地确定了施加在每个见证板上的爆炸脉冲。利用高速数码相机测量见证板块响应，以确定时间分辨、三维表面运动和最大板块变形。结果表明，根据炸药的特性，最大动态板变形是外加炸药脉冲的直接函数。尽管使用了两种不同的炸药，但实验趋势是相同的，突出表明通过爆炸特性确定的爆炸脉冲是材料爆炸响应的控制参数。本文采用了一种新的实验技术来测量爆炸动态响应，并记录了实验误差。最后，讨论了实验室规模爆炸试验在计算代码验证、材料响应缩放和高速材料性能定义方面的应用。
Laboratory-scale experiments were performed to measure the deformation of thin plates in response to varying explosive impulse. Experiments were conducted with a known explosive mass suspended in air at a known distance from an aluminum witness plate clamped in a “shock-hole” fixture. Through the use of well-characterized PETN and TATP explosive charges, the explosive impulse applied to each witness plate was determined a priori. The witness-plate response was measured using high-speed digital cameras to determine time-resolved, three-dimensional surface motion and maximum plate deformation. The results show that the maximum dynamic plate deformation is a straightforward function of applied explosive impulse, as determined from the explosive characterization. The experimental trend is the same despite the two different explosives used, highlighting that explosive impulse, determined through a blast characterization, is the controlling parameter in material blast response. A new experimental technique is used here to measure the dynamic blast response and the experimental errors are documented. Ultimately, applications of laboratory-scale explosive testing to computational code validation, material response scaling, and high-speed material property definition are discussed.