2024-03-19T11:10:50Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00007436
2023-01-16T03:52:49Z
320:321:322
Resistance-Curve Method for Predicting Fatigue Thresholds in Holed Specimens under Combined Torsional-Axial Loading
き裂伝ぱ抵抗曲線法による円孔材のねじりー軸力複合荷重下での疲労下限界の予測
田中, 啓介
20796
TANAKA, Keisuke
20797
秋庭, 義明
20798
AKINIWA, Yoshiaki
20799
森田, 和博
20800
MORITA, Kazuhiro
20801
脇田, 将見
20802
WAKITA, Masami
20803
Fatigue Thresholds
Notch Effect
Torsion
Combined Loading
Carbon Steel
Nonpropagating Crack
The R-curve method for predicting the fatigue thresholds of notched components was applied to the fatigue thresholds of notched components under combined loading of cyclic torsion and tension-compression. The prediction was compared with the experimental data obtained from thin-walled tubular specimen with a hole under the combination of cyclic torsion and axial loading. The effect of the hole size on the fatigue thresholds was calculated from the R-curve method for three cases: cyclic torsional stress, cyclic torsional stress with superposition of a in-phase cyclic tension-compression stress with the same amplitude, cyclic axial tension-compression stress. The stress ratio was R=-1. The experimental data agreed well with the prediction both for crack initiation and fracture. The measured length of nonpropagating cracks had some scatter and the maximum length agreed fairly well with the predicted line. The nonpropagating crack length normalized with the hole radius at the threshold stress for fracture was predicted fairly constant without respect to the hole size, while it varied slightly with the loading condition. The effect of the in-phase combination of axial and torsional stress loadings on the fatigue threshold was predicted by assuming the crack direction perpendicular to the maximum principal stress. A good agreement between predicted and experimental results was obtained.
journal article
日本機械学会
2006-08
application/pdf
日本機械学會論文集 A編
720
72
1137
1144
http://hdl.handle.net/2237/9119
0387-5008
https://nagoya.repo.nii.ac.jp/record/7436/files/JsMecEngA_72-720-1137.pdf
jpn
http://ci.nii.ac.jp/naid/110004763332/
日本機械学会
本文データは学協会の許諾に基づきCiNiiから複製したものである。