高温疲労き裂進展下限界値と負荷履歴依存
英字タイトル:
Fatigue Crack Threshold Depending on Loading History.
著者:
岡崎 正和 Masakazu OKAZAKI 岩崎 亮 Ryou IWASAKI 笠原 直人 Naoto KASAHARA
発刊日:
公開日:
Crack initiation and propagationFatigue thresholdInteraction between thermo-mechanical fatigue and high-cycle fatigue loadingsLoading historyRemaining life managementStress RatioSUS316 steel
Fatigue Crack Threshold Depending on Loading History.
著者:
岡崎 正和 Masakazu OKAZAKI 岩崎 亮 Ryou IWASAKI 笠原 直人 Naoto KASAHARA
発刊日:
公開日:
カテゴリ: 第9回
キーワードタグ:Crack initiation and propagationFatigue thresholdInteraction between thermo-mechanical fatigue and high-cycle fatigue loadingsLoading historyRemaining life managementStress RatioSUS316 steel
概要
Abstract Effect of loading history on the high cycle fatigue crack propagation behavior was experimentally studied in SUS 316 stainless steel, paying a special attention to an interaction between low-cycle thermo-mechanical fatigue loading and high cycle fatigue one in the fatigue crack propagation rates. The experimental results clearly demonstrat ed that the interaction was significant. It was shown that the stress ratio which was built-up under an influence of previous loading history made a major contribution there. Based on these findings, a new remaining life estimation method and model has been proposed to prevent the fatigue failures under the combined low/high cycle fatigue loadings.
