340 台形き裂の応力拡大係数評価における半だ円表面き裂モデルの適用性について(OS10-2 応力拡大係数,確率信頼性,OS10 エネルギー機器の経年変化に関する健全性評価手法の開発とその適用(1))

概要

論文の詳細を見る
Stress corrosion cracking (SCC) in the weld joints of Ni-base alloys in BWR plants has been reported and is one of the most important issues in the structural integrity assessment of the Ni-base alloy weld components. In the structural integrity evaluation, based on the fracture mechanics, the modeling of the crack shape is important. In this study, stress intensity factor K of axial surface cracks with elliptical and trapezoidal shapes in the weld metal in the BWR shroud support joints were evaluated by FEM analysis in order to examine the applicability of elliptical surface crack model that is generally adopted in the codes and standards to the stress intensity factor evaluation of trapezoidal surface crack.
一般社団法人日本機械学会の論文
2007-10-24