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一、等色线的测定方法 Ⅰ.等色线图案的特点 1.白光入射时等色线图案的特点 (1)用白光做实验时,等色线图案是彩色条纹图案。在这个图案中,凡是位置不随载荷改变的永久黑点或黑线,就是0级等色线。这些黑点在力学上相应于σ_1-σ_2=0的点(在自由边界上)和σ_1-σ_2即τ=0的点(在模型内相应于各向等拉或等压的应
First, the method of determination of isochromatic lines Ⅰ. The characteristics of isochromatic pattern 1. The characteristics of isochromatic pattern when white light is incident (1) The isochromatic pattern is a colored stripe pattern when experimenting with white light. In this pattern, any permanent dark spots or black lines whose position does not change with the load are the 0th-level isometric line. These black points mechanistically correspond to the point (on the free boundary) of σ_1 -σ_2 = 0 and the point of σ_1-σ_2 ie τ = 0 (corresponding to the isotropic or isostatic pull-in in the model