@article{oai:nagoya.repo.nii.ac.jp:00007468, author = {田中, 啓介 and TANAKA, Keisuke and 秋庭, 義明 and AKINIWA, Yoshiaki and 高橋, 晶広 and TAKAHASHI, Akihiro and 御厨, 照明 and MIKURIYA, Teruaki}, issue = {682}, journal = {日本機械学會論文集 A編}, month = {Jun}, note = {Fatigue tests of crack propagation from a circular notch in thin-walled tubular specimens made of a medium-carbon steel were performed under cyclic torsion with and without superposed static and cyclic axial loading. The propagation path of Mode I fatigue cracks followed the direction perpendicular to the maximum direction of the total range of the normal stress. The propagation rate was faster than the uniaxial data when compared at the same range of the stress intensity factor or the effective stress intensity factor. The negative nonsingular stress induced excessive plasticity ahead of the fatigue crack, which accelerated the fatigue crack. The J-integral range was proved to be an appropriate parameter for crack propagation with excessive plasticity under combined loading.}, pages = {1001--1008}, title = {ねじり - 軸力負荷における鉄鋼薄肉円管試験片における円孔からの疲労き裂の伝ぱ挙動}, volume = {69}, year = {2003} }