C110 減肉エルボ配管の内圧および面内曲げ崩壊挙動(材料強度・規格-(2),OS5 保全・設備診断技術),動力エネルギーシステム部門20周年,次の20年への新展開)

概要

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Effect of wall thinning on the strength of elbow pipe was addressed. A testing system was developed to investigate the collapse load of elbow pipe subjected to the in-plane bending of closing mode under a constant internal pressure. The artificial wall thinning was introduced to the inner surface at extrados of elbow. The collapse load obtained as the maximum load from the fracture test was compared with the numerical results of the finite element elasto-plastic finite deformation analysis. However, the numerical results underestimated the maximum load, since the finite element analysis did not consider the effect of the thickness variation and strain hardening during the bending process to form the elbow from the straight pipe.
一般社団法人日本機械学会の論文
2010-06-20