21411 高温下における円孔板の参照応力法を用いたJ積分簡易評価手法に関する研究(一般講演破壊靭性)

概要

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In order to evaluate applicability and validity of Reference Stress Method (RSM) to actual component, comparisons of J-integral obtained from RSM with experiment were carried out. Load-controlled fatigue and creep-fatigue tests were carried out to obtain experimental J-integral in a previous report. The perforated plate made of SUS304 was employed as a specimen, and the experiments were carried out at 550℃ in the air. The reference stresses were calculated by using FEM and net sectional stress. As a result, it was shown that RSM can estimate J-integral accurately when crack length was small. However under creep-fatigue condition, fatigue J-integral range evaluated by RSM was excessively compared with experimental results because of variation of material properties affected by creep.
一般社団法人日本機械学会の論文
2010-03-09