STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE
Surface defect is the main fatigue failure source of helicopter metal dynamic components. Depth data of impact pit defects on surface of aluminum alloy critical dynamic parts of helicopter were collected,and statistical analysis was conducted. Statistic results show that the depth of impact pits obe...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Journal of Mechanical Strength
2020-01-01
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| Series: | Jixie qiangdu |
| Subjects: | |
| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.04.029 |
| _version_ | 1797767650580889600 |
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| author | NI Yang ZHOU ChuWei YU JianJian ZOU Jing |
| author_facet | NI Yang ZHOU ChuWei YU JianJian ZOU Jing |
| author_sort | NI Yang |
| collection | DOAJ |
| description | Surface defect is the main fatigue failure source of helicopter metal dynamic components. Depth data of impact pit defects on surface of aluminum alloy critical dynamic parts of helicopter were collected,and statistical analysis was conducted. Statistic results show that the depth of impact pits obey the exponential distribution,and a standard size is confirmed according to the size coverage of 90%. The impact pit formation and fatigue crack initiation life of aluminum alloy（2 A12）commonly used in aviation were investigated using finite element method combined with continuum damage mechanics theory,and the rationality of the method was validated through fatigue test results. The study shows that a rational fatigue analysis of impact pit defect must take the local residual stress and plastic strain into account. |
| first_indexed | 2024-03-12T20:42:53Z |
| format | Article |
| id | doaj.art-2edd9e36bd7c4225a94e2ac839c9e812 |
| institution | Directory Open Access Journal |
| issn | 1001-9669 |
| language | zho |
| last_indexed | 2024-03-12T20:42:53Z |
| publishDate | 2020-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj.art-2edd9e36bd7c4225a94e2ac839c9e8122023-08-01T07:51:43ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692020-01-014294194630608430STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURENI YangZHOU ChuWeiYU JianJianZOU JingSurface defect is the main fatigue failure source of helicopter metal dynamic components. Depth data of impact pit defects on surface of aluminum alloy critical dynamic parts of helicopter were collected,and statistical analysis was conducted. Statistic results show that the depth of impact pits obey the exponential distribution,and a standard size is confirmed according to the size coverage of 90%. The impact pit formation and fatigue crack initiation life of aluminum alloy（2 A12）commonly used in aviation were investigated using finite element method combined with continuum damage mechanics theory,and the rationality of the method was validated through fatigue test results. The study shows that a rational fatigue analysis of impact pit defect must take the local residual stress and plastic strain into account.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.04.029Defect statistics;Fatigue life;Impact pit;Finite element method;Continuum damage mechanics |
| spellingShingle | NI Yang ZHOU ChuWei YU JianJian ZOU Jing STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE Jixie qiangdu Defect statistics;Fatigue life;Impact pit;Finite element method;Continuum damage mechanics |
| title | STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE |
| title_full | STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE |
| title_fullStr | STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE |
| title_full_unstemmed | STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE |
| title_short | STUDY ON FLAW DEPTH STATISTICS AND CORRESPONDING FATIGUE LIFE OF HELICOPTER ALUMINIUM ALLOY STRUCTURE |
| title_sort | study on flaw depth statistics and corresponding fatigue life of helicopter aluminium alloy structure |
| topic | Defect statistics;Fatigue life;Impact pit;Finite element method;Continuum damage mechanics |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.04.029 |
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