@article{oai:ir.kagoshima-u.ac.jp:00007724,
 author = {若原, 稔 and WAKAHARA, Minoru},
 journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University},
 month = {Sep},
 note = {The behavior of fatigue crack propagation was investigated regarding the effect of a number of notches by a round bar specimen of S35C with one to three sharp notches subjected to twisting.
The results obtained are summerized as follows ;
1) Both the fatigue limit for crack initiation τ_w1 and the number of stress cycles at crack initiation
increased by increasing the number of notches.
2) The length of non-propagation crack in the fatigue limit for failure τ_w2 was found longer than that of rotary bending.
3) The behavior of fatigue crack propagation in twisting is complicated by branching and coalescence of cracks.},
 pages = {173--184},
 title = {多連切欠き材の疲れ挙動について : 第四報 切欠きの干渉が,ねじり疲れ特性に及ぼす影響について},
 volume = {32},
 year = {1990}
}