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柱面内爆驱动下铅飞层对碰区动载行为的实验研究

DOI: 10.11858/gywlxb.2013.06.014, PP. 884-888

Keywords: 柱面内爆,爆轰波对碰,铅飞层,对碰区凸起,冲击熔化

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Abstract:

采用光学阴影照相和脉冲X光照相,对柱面内爆对碰驱动下铅飞层对碰区凸起行为进行了实验研究。实验结果显示,铅飞层对碰区出现严重的射流状超前凸起,凸起行为表现出明显的失稳发展倾向。由于对碰产生高压,因此铅飞层对碰区可能完全熔化,变成名义上无剪切强度的流体。材料的低强度、低熔点(冲击熔化压力)性能是造成铅飞层对碰区出现射流状超前凸起现象的主要因素。还观察到对碰区出现3个超前凸起现象,初步分析可能是由于柱面滑移爆轰波对碰导致的波系反射、叠加造成的,具体原因还有待于进一步分析研究。

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