近二十余年来,激光散斑法在实验应力分析领域中广为重视.它的突出优点是灵敏度可调,无损以及能给出全场信息.测试者可根据待测应变量的大小,调节滤波孔高度,选择适当的条纹密度进行测量.因而这种方法对于弹性、塑性应变均能适用.是目前较理想、有潜力的测试手段之一. Nearly two decades, the laser speckle method in the field of experimental stress analysis is widely valued.Its prominent advantage is the sensitivity of adjustable, nondestructive and can give the audience information.Tester can be measured according to the size of the variable, By adjusting the height of the filter hole and selecting the appropriate stripe density for measurement, this method is suitable for both elastic and plastic strain, which is one of the most ideal and potential testing methods.