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爆炸应力波作用下裂纹与孔洞的动态焦散线分析
引用本文:姚学锋,方竞.爆炸应力波作用下裂纹与孔洞的动态焦散线分析[J].爆炸与冲击,1998,18(3):231-236.
作者姓名:姚学锋  方竞
作者单位:[1]清华大学工程力学系 [2]北京大学力学与工程科学系
摘    要:将高速摄影技术与动态焦散线方法相结合,研究了爆炸应力波对裂纹、空孔的作用历史,记录了环绕它们的动态焦散斑图,给出了爆炸应力场中裂纹尖端复合应力强度因子的时间依赖关系以及空孔周围应力场分布的瞬态变化过程,为固体介质的爆破机理研究提供了新方法。

关 键 词:爆炸应力波  动态焦散线  复合应力场  裂纹  孔洞

DYNAMIC CAUSTICS ANALYSIS OF CRACK AND HOLE UNDER THE EXPLOSIVE STRESS WAVE
Yao Xuefeng a,Fang Jing b,Xiong Chunyang b.DYNAMIC CAUSTICS ANALYSIS OF CRACK AND HOLE UNDER THE EXPLOSIVE STRESS WAVE[J].Explosion and Shock Waves,1998,18(3):231-236.
Authors:Yao Xuefeng a  Fang Jing b  Xiong Chunyang b
Abstract:The historis of the explosive stress wave acted on the crack and the hole are studied by means of uniting high speed cranz schardin photography with dynamic caustics.Two kinds of dynamic caustic patterns around the crack tip and the hole edge in the field of explosive stress are recorded separately.The time dependent relations of complex stress intensity factors at crack tip and the instaneous response of stress field around hole edge are showed.The results supply the new method of studying the blasting mechanism of solid media.
Keywords:explosive  stress  wave    dynamic  caustics    complex  stress  field
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