変動荷重下の低サイクル疲労き裂進展評価パラメータについて

概要

論文の詳細を見る
The rain flow method (RFM), widely used as one of the useful fatigue damage counting methods, was re-examined in conjunction with the actual fatigue process such as crack initiation and propagation. The low-cycle fatigue tests were conducted on a mild steel under variable strain amplitude. A special attention was paid to correlate the fatigue life controlling-volumetric parameter, plastic strain range Δεp, with a fracture mechanics parameter ΔCTOD. Then, a physical meaning of RFM was given on the basis of small crack growth law. The experimental results of the variable strain amplitude fatigue tests showed that the trend of the change of the value Δεp was similar to that of ΔCTOD. In addition, the small crack growth rate versus ΔCTOD showed a linear relationship.
一般社団法人日本機械学会の論文
1998-06-25