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統計的平均としてのMiner則成立条件の検討
https://jaxa.repo.nii.ac.jp/records/44618
https://jaxa.repo.nii.ac.jp/records/44618f3d5b248-174c-4450-8b27-4daccbd36cad
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
naltr00370.pdf (853.8 kB)
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| Item type | テクニカルレポート / Technical Report(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | 統計的平均としてのMiner則成立条件の検討 | |||||||||
| 言語 | ||||||||||
| 言語 | jpn | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_18gh | |||||||||
| 資源タイプ | technical report | |||||||||
| その他のタイトル（英） | ||||||||||
| その他のタイトル | Conditions Required to Satisfy Miner’s Hypothesis Under Statistical Consideration | |||||||||
| 著者 |
下河, 利行
× 下河, 利行
× SHIMOKAWA, Toshiyuki
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| 著者所属 | ||||||||||
| 航空宇宙技術研究所機体第二部 | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| Second Airframe Division, National Aerospace Laboratory(NAL) | ||||||||||
| 出版者 | ||||||||||
| 出版者 | 航空宇宙技術研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | National Aerospace Laboratory(NAL) | |||||||||
| 書誌情報 |
航空宇宙技術研究所報告 en : Technical Report of National Aerospace Laboratory TR-370 巻 370, p. 12, 発行日 1974-06 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | The conditions for Miner’s hypothesis to hold statistically are discussed with regard to the distribution of fatigue life and the cumulative damage in fatigue process. The Weibull, the Normal, and the Log-normal distribution functions are taken as that of fatigue life, which are frequently used to represent the test data of fatigue life. This study leads to the following conditions:(1)The condition concerning the scatter of fatigue life is that the coefficient of variation of fatigue life is constant, regardless of the stress level for the three types of the distribution functions described above. (2)The cumulative damage in the fatigue process is expressed by the damage curve, which is defined as the relation of the damage of a given specimen to its inherent cycle ratio n/N, where n is the number of cycles applied at a given stress level and N is the number of cycles to failure of the specimen at that stress level. It is assumed that the ascending order of the damage fraction of a given specimen in a group of spciments is invariable at any number of cycles under any applied stress level. Based on the assumption mentioned above, the condition concerning the cumulative damage in the fatigue process is that one damage curve is determined regardless of the ascending order of damage fraction of the specimen and the applied stress level, and that the increment of the damage of the specimen accumulated at the i-th stress level Si in a variable stress history agrees with that of the case of constant stress level test at Si. On the other hand, when the conditions described above are not satisfied, the mean cumulative cycle ratio to failure E［2 sumc i=1(ni/Ni)］, where Ni is the mean fatigue life at Si, for two stress level tests is discussed. The deviation of the mean cumulative cycle ratio to failure from unity, which is influenced by the difference of the scatter of fatigue life and that of the damage curve between two stress levels, is evaluated. The mean cumulative cycle ratio to failure is less influenced by the difference of the scatter of fatigue life than that of the damage curve. It is also shown that the mean cumulative cycle ratio to failure is influenced by the co-operation of the scatter of fatigue life and the difference of the damage curve. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0389-4010 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: NALTR0370000 | |||||||||
| レポート番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | レポート番号: NAL TR-370 | |||||||||
