@techreport{oai:jaxa.repo.nii.ac.jp:00044693,
 author = {飯田, 宗四郎 and 角田, 義秋 and IIDA, Soushiro and KAKUTA, Yoshiaki},
 month = {Jan},
 note = {Crack propagation behavior in 2024-T4 tension plates was investigated for cracks which generated from the initially parallel staggered notches under cyclic loading. Stress intensity factors for opening and edge-sliding mode of crack surface displacements, KI and KII, were determined by the finite element method for those cracks. Crack propagation rate, dl/dN, was then plotted against the maximum stress intensity factor for opening mode, KI, in the presence of edge-sliding mode of stress intensity factor, KII, and the effect of staggerness of the initial notches was examined. The agreement of experimental results with several suggested formulas for crack propagation rate were discussed. Crack propagation paths were predicted by the direction of principal stress at the crack tip. The comparison between the predicted crack propagation path and the observed crack propagation path in the experiment showed good agreement., 資料番号: NALTR0443000, レポート番号: NAL TR-443},
 title = {平行食い違い切欠からの疲労き裂進展},
 year = {1976}
}