URL：https://www.researchgate.net/publication/327702631/figure/fig2/AS:678300250820609@1538730790378/Stresses-modelled-from-the-stress-function-i-i-a-and-i-i-b_Q320.jpg
掲載元：https://www.researchgate.net/publication/327702631_Pipeline_Stress_Analysis_Through_Stress_Function_Fittings
