STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS
The key components in aircraft will be subjected to typical asymmetric loads in service,thus their fatigue behavior can be inevitably strongly affected by the mean stress effect. The modified Walker model employs the multiple-nonlinearfitting method to deal with fatigue test data under various stres...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Mechanical Strength
2021-01-01
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| Series: | Jixie qiangdu |
| Subjects: | |
| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2021.02.021 |
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| _version_ | 1841535856144285696 |
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| author | SU YunLai LU Shan DONG DengKe CHEN XianMin CHEN Li |
| author_facet | SU YunLai LU Shan DONG DengKe CHEN XianMin CHEN Li |
| author_sort | SU YunLai |
| collection | DOAJ |
| description | The key components in aircraft will be subjected to typical asymmetric loads in service,thus their fatigue behavior can be inevitably strongly affected by the mean stress effect. The modified Walker model employs the multiple-nonlinearfitting method to deal with fatigue test data under various stress ratios,by which the influence of material and maximum stress on mean stress effect can both be considered. Eighteen sets of fatigue test data from twelve kinds of aeronautical materials in various loading conditions were employed to validate the predict accuracy of modified Walker model,and the results were compared with other commonly used models. The study shows that the influence of maximum stress on mean stress effect varies with materials,while the prediction accuracy of the modified Walker model for each group of test data is better than that any other candidate models to varying degrees. |
| format | Article |
| id | doaj-art-5921333447d94589aa6ee9d9eb9fd4ac |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2021-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-5921333447d94589aa6ee9d9eb9fd4ac2025-01-15T02:26:19ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692021-01-014339740330610385STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADSSU YunLaiLU ShanDONG DengKeCHEN XianMinCHEN LiThe key components in aircraft will be subjected to typical asymmetric loads in service,thus their fatigue behavior can be inevitably strongly affected by the mean stress effect. The modified Walker model employs the multiple-nonlinearfitting method to deal with fatigue test data under various stress ratios,by which the influence of material and maximum stress on mean stress effect can both be considered. Eighteen sets of fatigue test data from twelve kinds of aeronautical materials in various loading conditions were employed to validate the predict accuracy of modified Walker model,and the results were compared with other commonly used models. The study shows that the influence of maximum stress on mean stress effect varies with materials,while the prediction accuracy of the modified Walker model for each group of test data is better than that any other candidate models to varying degrees.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2021.02.021Fatigue lifeMean stress effectModified Walker modelMultiple nonlinear fitting |
| spellingShingle | SU YunLai LU Shan DONG DengKe CHEN XianMin CHEN Li STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS Jixie qiangdu Fatigue life Mean stress effect Modified Walker model Multiple nonlinear fitting |
| title | STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS |
| title_full | STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS |
| title_fullStr | STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS |
| title_full_unstemmed | STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS |
| title_short | STRESS-BASED FATIGUE LIFE MODEL UNDER ASYMMETRICAL LOADS |
| title_sort | stress based fatigue life model under asymmetrical loads |
| topic | Fatigue life Mean stress effect Modified Walker model Multiple nonlinear fitting |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2021.02.021 |
| work_keys_str_mv | AT suyunlai stressbasedfatiguelifemodelunderasymmetricalloads AT lushan stressbasedfatiguelifemodelunderasymmetricalloads AT dongdengke stressbasedfatiguelifemodelunderasymmetricalloads AT chenxianmin stressbasedfatiguelifemodelunderasymmetricalloads AT chenli stressbasedfatiguelifemodelunderasymmetricalloads |