OS2509 エルボ配管の低サイクル疲労挙動に及ぼす局部減肉位置の影響(OS25-2 応力腐食割れ・配管,OS-25 供用エネルギー機器の経年変化と健全性評価)

概要

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Low-cycle fatigue tests were conducted using elbow specimens with local wall thinning in order to investigate the influences of position of local wall thinning on the low-cycle fatigue behaviors of elbows. Local wall thinning was machined on the inside of the elbow in order to simulate metal loss from erosion corrosion. The local wall thinning was located in three different areas. The elbow specimens were subjected to cyclic in-plane bending under displacement control with internal pressure of 9 MPa. In addition, three-dimensional elastic-plastic analyses were also carried out using the finite element method. As a result, the crack penetration area and the crack growth direction were successfully predicted by the analyses.
一般社団法人日本機械学会の論文
2011-07-16