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用等色条纹来测定薄壁园筒上裂纹的混合型应力强度因子(K_Ⅰ,K_Ⅱ)。利用冻结切片在偏光显微镜下进行测量,实验结果就其中一种裂纹的应力强度因子与理论解比较误差不大,其精度满足工程要求。从而推证薄壁园筒上,其它裂纹的试验精度也能满足工程上的要求。
The mixed stress intensity factor (K_I, K_II) of cracks on thin walled cylinder was determined by the same color stripes. The frozen slice was used to measure under polarized light microscope. The experimental results showed that the error strength of one kind of crack was not much different from the theoretical solution, and its accuracy met the engineering requirements. Thus it can be concluded that the test accuracy of other cracks on the thin-walled cylinder can meet the engineering requirements.