1018 有限要素解析によるエルボ配管の内圧および面内曲げ崩壊挙動評価(OS10-5 供用エネルギー機器の経年変化と健全性評価-配管・エルボー強度-)

概要

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Effect of wall-thinning dimensions on the strength of piping elbows against internal pressure and in-plane bending was examined through the finite element analysis considering material nonlinearity and geometrical nonlinearity. The pipe used for simulation was MS SMTP370 80A Sch160. Assuming the wall-thinning area was fixed to relatively narrow area, the effect of depth and position of wall-thinning was investigated. The capped elbow specimen was first subjected to a constant internal pressure, and second subjected to the close-mode in-plane bending until the prescribed displacement The maximum load was defmed as the collapse load. From the simulation results, we found that the effect of relatively narrow wall-thinning on the collapse load was small under the internal pressure and close-mode in-plane bending.
2010-10-09