@article{oai:u-ryukyu.repo.nii.ac.jp:02001576, author = {Purnowidodo, Anindito and Hisai, Takeo and Fukuzato, Shingo and Makabe, Chobin and 真壁, 朝敏}, issue = {68}, journal = {琉球大学工学部紀要}, month = {Mar}, note = {Crack propagation is retarded after applying a tensile overload, and accelerated after applying a compressive overload in fatigue tests under constant base stress amplitude. However, at a negative value of the baseline stress ratio, the fatigue crack propagation rate can accelerate after applying a tensile overload. To evaluate such crack propagation behavior, the effective stress intensity factor range has been employed. The transition of residual fatigue life after applying these loads was observed and this behavior was dependent on the loading conditions. When the applied overload level was lower than a critical level, retardation of crack propagation was observed. However, when the applied overload level was higher than a critical level, the crack growth rate got higher. These phenomena are related to not only residual stress, but also crack opening behavior., 紀要論文}, pages = {1--11}, title = {Crack Propagation Behavior in S15C and S35C after Overload}, year = {2007} }