本文在分析二维光弹测定应力强度因子K_1的单参数向径法、双参数向径法、单参数面积法的基础上,提出了光弹性测定应力强度因子K_1的一种新方法—双参数面积法。用单边裂纹三点弯曲试件和单边裂纹拉伸试件进行了实验检测。通过对各种方法实验结果的对比,证明双参数面积法所得结果稳定,误差小。 Based on the analysis of single-parameter radial method, two-parameter radial method and single-parameter area method of stress intensity factor K_1 for two-dimensional photoelasticity measurement, a new method of photoelasticity determination of stress intensity factor K_1 Area method. The unilateral crack three-point bending specimen and unilateral crack tensile specimen were tested. By comparing the experimental results of various methods, it is proved that the results obtained by the two-parameter area method are stable and the error is small.