一、前言 在实验应力分析领域中,光弹性技术是求平面应力场的主要方法。当偏振光或圆偏振光透过受应力的模型时,产生的光程差正比于主应力差,为求得模型各点的主应力分量,尚需补充等倾线(主应力方向线),用由弹性力学平衡微分方程推导出的切力差法来计算。但是由于等倾线的散漫和切力差法计算 I. Preface In the field of experimental stress analysis, photoelasticity is the main method to find the plane stress field. When the polarized light or circular polarized light through the stress model, the resulting optical path difference is proportional to the main stress difference, in order to obtain the model of the main stress component at each point, still need to add isocline (main stress direction line) Calculated using the difference in shear force derived from the equilibrium equations of elasticity. However, due to isomorphic casual and shear difference method calculation