URL：https://www.researchgate.net/publication/339367989/figure/fig6/AS:1084248064827421@1635516291852/Variable-stiffness-beam-with-the-rectangular-section-and-its-elastic-plastic-stress.jpg
掲載元：https://www.researchgate.net/figure/Variable-stiffness-beam-with-the-rectangular-section-and-its-elastic-plastic-stress_fig6_339367989
