並列タイトル等Estimation of Fatigue Life Distribution from S-N Curve
タイトル(掲載誌)航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-581
一般注記The relationship between the S-(middle) N curve, where (middle) N is the median fatigue life, and empirical fatigue life distributions from samples of fairly large sizes has been analyzed using two groups of data, i.e., five data for steels and seven data for aluminum alloys collected from published papers and books. The distribution shape of fatigue life is found to be related to the shape of the S-(middle)N curve in the neighborhood of the test stress level. To compare the quantitative relationship between the scatter of fatigue life and the slope of the S-(middle)N curve in various test data, test stress levels were standardized by the median fatigue strength at 10(exp 5) cycles in each data, and standardized S-(middle)N curves, where “standardized”means the use of such standardized stress levels, were drawn. The standard deviation of log-life in either steels or aluminum alloys has an obvious linear relation on double logarithmic graph paper with the slope of the standardized S-(middle)N curve at the test stress level. The distribution of the median fatigue strength corresponding to each fatigue life obtained at one stress level is normal in shape and its standard deviation is nearly constant regardless of the test stress level in each data. On the basis of these results, a method for estimating fatigue life distribution is developed when the available information is limited either to a simple S-N curve only or to the original fatigue life data for the construction of such an S-N curve.
資料番号: NALTR0581000
レポート番号: NAL TR-581
一次資料へのリンクURLhttps://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=44835&item_no=1&attribute_id=31&file_no=1
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース(IRDB)(機関リポジトリ)
提供元機関・データベース宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ