1436 内圧を受ける減肉配管の破壊強度評価(シェルモデルによる解析)(S15-3 プラント機器構造物の強度評価,S15 熱応力,応力特異性と強度評価)

概要

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The ultimate strength of a pressurized corroded pipe were evaluated by elastic-plastic finite element method. The analyses were performed for different materials as well as different axial length and circumferential angles of geometry of the flaw on inner surface of the pipe. In the analyses, shell element is applied and it's results were compared with the result which applied solid element FEM model. The result showed that shell element model results were in good agreement with the results of solid element model on fracture pressure over flaw length, for carbon steel and stainless steel. The comparison of solid element analyses and shell element analyses on flaw angle revealed that when flaw angles were acute, shell element model may not produce conservative results than solid element model.
2005-09-18