光通量法在SHPSB剪切应变测量中的应用  

Luminous flux method for measuring shear strain of the specimen in SHPSB

作　　者：赵鹏铎[1] 卢芳云[1] 陈荣[1] 李俊玲[1] 林玉亮[1] 谭多望[2] 

机构地区：[1]国防科学技术大学理学院,湖南长沙410073 [2]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理国防科技重点实验室,四川绵阳621900

出　　处：《爆炸与冲击》2011年第3期232-236,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10672177,10872215,10902100)~~

摘　　要：利用光通量方法对分离式霍普金森压剪杆实验技术中的剪切应变测量进行了实验研究。实验装置主要包括:准直激光器、光电接收器、光学挡板。由装置性能验证实验结果以及不确定度分析结果表明:利用基于光通量法的剪切应变测量技术能够可靠地测量SHPSB(split Hopkinson pressure bar)试样的剪切应变。并对比了基于光通量法测量的剪切应变值与理论近似结果,结果显示前者小于后者,分析并讨论了原因。A technique based on luminous flux method was applied to measure shear strain in SHPSB(split Hopkinson pressure bar) experiment.The optical setup consisted of three major components: a collimation laser,a photoelectric sensing apparatus and two optical baffles.Results from a valid experiment and an uncertainty analysis showed that it was effective and accurate to get the shear strain of the specimen.The shear strain measured by the optical apparatus was compared with the theoretic ones.It was found and analyzed that the measured shear strain was less than that of the theory in value.

关 键 词：固体力学 SHPSB 压剪复合加载 光通量法 剪切应变 

分 类 号：O36[理学—流体力学]