K-0822 熱応力下におけるクリープJ積分簡易評価法の開発(S11-6 構造健全性評価(6))(S11 構造健全性評価)

概要

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Creep is considered to be an essential driving force for crack propagation in components operated at high temperatures and creep J-integral needs to be accurately evaluated for its prediction. Because evaluation of the creep J-integral by detailed numerical analysis is time-consuming and requires a high degree of expertise, a strong need exists for the development of a reliable simplified evaluation method. In this study, a simplified evaluation method for the creep J-integral was developed as a part of the flaw evaluation guideline for fast reactor components. The method utilizes the concepts of reference stress and elastic follow-up. Effectiveness of the method was demonstrated through comparison with the results of full numerical analysis for cracked cylinder subjected to thermal stress.
社団法人日本機械学会の論文
2001-08-22