摘要
利用反射型动态云纹实验方法，对爆炸载荷作用下岩石平板试件中应力波传播及裂纹动态扩展进行研究，给出了高速转镜相机记录到的岩石平板爆炸加载实验时的动态云纹图。根据动态云纹图分析了炸药爆炸产生的应变场，并对裂纹的形成及其扩展速度的变化趋势进行了讨论。
This paper studies stress wave propagotion and dynamic crack extension in rockplate under explosive loading by meaus of dynamic reflection moire method,and demonstrates dynamic moire pictures recorded by a GSJ rotating mirror framing camera;Based on the dynamicmoire records,the blasting strain fields in rock specimens are analysed,and the variation of thevelocity of crack propagation with time and the phenomena of crack branching and crack arrestingoccured in experiments are discussed。Experimental results show that it is feasible to study the propagation of blasting strain wavesand cracks by dynamic rdflection moire method.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1994年第3期193-198,共6页
Explosion and Shock Waves
基金
煤炭部科学基金
关键词
爆炸力学
岩石爆破
爆炸波
云纹法
reflection moire method,explosive loading, dynamic crack extension, high speed photography
