@techreport{oai:jaxa.repo.nii.ac.jp:00044812,
 author = {角田, 義秋 and 北川, 英夫 and 結城, 良治 and 寺田, 博之 and 太平, 寿昭 and KAKUTA, Yoshiaki and KITAGAWA, Hideo and YUUKI, Ryoji and TERADA, Hiroyuki and OHIRA, Toshiaki},
 month = {Jan},
 note = {The applicability of linear fracture mechanics to biaxial fatigue crack propagation is examined experimentally and analytically. The biaxial loading high cycle fatigue testing machine, which is used, is capable of controlling the mean and the amplitude of both axial loads and the phase difference between them. The cross type specimens with a center crack of high strength steel(WELTEN 60) and two aluminum alloys(2024-T3, 7075-T6) are tested for use in the experiments. In this paper, the following stress intensity factor expression, in which the biaxial loading effects were taken into account by the linear superposing manner, was introduced for data analysis; KI=σy square root ofπa FI,y + σx square root of πa FI,x where FI,y and FI,x are the correction factors of the stress intensity factors of the biaxial loading specimen which was obtained by the modified mapping collocation method. The fatigue crack propagation properties(da/dN～ΔK) were obtained under the four sets of biaxial load conditions, for three kinds of materials. The da/dN～ΔK curves in various combinations of biaxial loads agree with each other. Moreover it was shown that these data analysed by the above equation coincide with those of the center notched strip specimens under uniaxial load with sufficient accuracy., 資料番号: NALTR0558000, レポート番号: NAL TR-558},
 title = {二軸荷重下における疲れき裂成長特性},
 year = {1979}
}