硬度のばらつきに注目した疲労限度信頼性の評価 : 第1報,応力比-1下の高強度鋼の平滑材に適用した場合

抄録

In this paper, a quantitative prediction method for the fatigue limit reliability is proposed by using statistical characteristics of hardness in a small region and mechanical condition in a small region based on a defect size distribution and a certain stress applied to a defect. And rotating bending and push-pull fatigue tests under R = -1 are carried out on quenched-tempered 0.5% carbon steels, whose average hardness is about H_v ≃ 600. Comparing a predicted fatigue limit reliability with experimental data, the applicability of the present proposed method is examined and confirmed.