407 全ての応力振幅が疲労限度以下での変動応力フレッティング疲労(OS フレッティング磨耗と疲労(2))

概要

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It was shown that fretting fatigue failure occurred in the case of variable amplitude loading even when every stress amplitude was kept below the fretting fatigue limit diagram. The reason why such a phenomenon occurred was examined by repeated two-step loading fretting fatigue test. The first step stress of the repeated two-step loading was chosen as R=-l and the second step stress was with high mean stress. A non-propagating crack was formed by the first step stress even well below the fatigue limit. This crack functioned as a pre-crack for the second step stress with high mean stress. Consequently, fatigue failure did occur even when every stress was kept below the fretting fatigue limit diagram of constant amplitude.
一般社団法人日本機械学会の論文
2004-11-05