用白光散斑方法测量动态变形

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Measurements for Dynamic Deformation by Mismatch with Speckle Method

Laboratory of Photo-Mechanics, Department of Engineering Mechanics, Tongji University, Shanghai

摘要: 本文提出一个简便的,用多火花动光弹仪进行动态变形测量的白光散斑方法,用此方法不但可以进行动态大变形测量^[1],也可动态小变形测量.如果和动光弹等色线结合,可以同时获得被测材料的弹性模量、泊松比、材料条纹值参数.

Abstract: This paper presents a simple method for measurements,of dynamic deformation by mismatch white speckle method using dynamic photoelastic device.The method is able to measure not only large dynamic deformation^[1],but also small dynamic deformation.Combined with dynamic isochromate pattern,the elastic modulus Poisson's ratio and dynamic material fringe value of the material measured can be obtained by the method.

[1]	抹雷、伍小平、苏先基,用多火花照相系统测量动态变形的白光散斑法,第四届中国实验应力分析学术会议论文(1984),
[2]	郭靖华、王祥林,应用云纹法测量瞬变形态,第三届中国宝验应力分析学术会议论文(1982),
[3]	王祥林、郭靖华,测量位移的白光散斑法.第三属中国实验应力分析学术会法论文(1982).
[4]	Forno,C.,Laser Speckle and Its Application,London press(1977).
[5]	曹正元、胡德敬、方如华、陈方,动态应力分离实验新方法,第四届中国高速摄影与光子学学术会议论文(1985),
[6]	Forno,C.,Optics and Laser Technology(1975),217-219.

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