EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE
Established the double cold expansion simulation model, and investigated the effects of surface micromorphology characteristics on the fatigue performance of double cold expanded holes. The double cold expansion process and fatigue life of the strengthened holes was simulated by using ABAQUS and MSC...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Mechanical Strength
2022-01-01
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| Series: | Jixie qiangdu |
| Subjects: | |
| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2022.05.011 |
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| _version_ | 1841534426537787392 |
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| author | JIANG TingYu WANG Yang YANG Zhen WANG Peng WAN ZhiCheng ZHANG QuanLi SU HongHua |
| author_facet | JIANG TingYu WANG Yang YANG Zhen WANG Peng WAN ZhiCheng ZHANG QuanLi SU HongHua |
| author_sort | JIANG TingYu |
| collection | DOAJ |
| description | Established the double cold expansion simulation model, and investigated the effects of surface micromorphology characteristics on the fatigue performance of double cold expanded holes. The double cold expansion process and fatigue life of the strengthened holes was simulated by using ABAQUS and MSC. Fatigue software. The hole wall element was selected, and the surface micro-profile of the hole wall was represented as the semi-ellips micro-notches. The S-N curve of the material is modified by effective stress concentration factor K<sub>f</sub>, and investigated the effects of surface micro-profile on the fatigue performance of double cold expanded holes.The results show that there existed compressive residual stress layer on the hole wall after the double cold expansion process, and the fatigue life of the expanded sample was increased. With the increasing of the number of micro-notches in the hole wall, the stress concentration factor can be alleviated effectively, and stress concentration factor K<sub>t</sub> is positively correlated with the depth-width ratio b/a and the distance-width ratio d/（2a）. The double cold expansion process can reduce the surface roughness of the hole wall by 21%～49%, which can effectively alleviate the notch stress concentration and improve the fatigue performance of the hole. |
| format | Article |
| id | doaj-art-a5a08f4eb879404cbe53a15577d84145 |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2022-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-a5a08f4eb879404cbe53a15577d841452025-01-15T02:39:30ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692022-01-01441091110031951515EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLEJIANG TingYuWANG YangYANG ZhenWANG PengWAN ZhiChengZHANG QuanLiSU HongHuaEstablished the double cold expansion simulation model, and investigated the effects of surface micromorphology characteristics on the fatigue performance of double cold expanded holes. The double cold expansion process and fatigue life of the strengthened holes was simulated by using ABAQUS and MSC. Fatigue software. The hole wall element was selected, and the surface micro-profile of the hole wall was represented as the semi-ellips micro-notches. The S-N curve of the material is modified by effective stress concentration factor K<sub>f</sub>, and investigated the effects of surface micro-profile on the fatigue performance of double cold expanded holes.The results show that there existed compressive residual stress layer on the hole wall after the double cold expansion process, and the fatigue life of the expanded sample was increased. With the increasing of the number of micro-notches in the hole wall, the stress concentration factor can be alleviated effectively, and stress concentration factor K<sub>t</sub> is positively correlated with the depth-width ratio b/a and the distance-width ratio d/（2a）. The double cold expansion process can reduce the surface roughness of the hole wall by 21%～49%, which can effectively alleviate the notch stress concentration and improve the fatigue performance of the hole.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2022.05.011Double cold expansionSurface micro-mrofileSimulation analysisStress concentration factorFatigue life |
| spellingShingle | JIANG TingYu WANG Yang YANG Zhen WANG Peng WAN ZhiCheng ZHANG QuanLi SU HongHua EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE Jixie qiangdu Double cold expansion Surface micro-mrofile Simulation analysis Stress concentration factor Fatigue life |
| title | EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE |
| title_full | EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE |
| title_fullStr | EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE |
| title_full_unstemmed | EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE |
| title_short | EFFECTS OF SURFACE MICROMORPHOLOGY CHARACTERISTICS ON FATIGUE PERFORMANCE OF DOUBLE COLD EXPANDED HOLE |
| title_sort | effects of surface micromorphology characteristics on fatigue performance of double cold expanded hole |
| topic | Double cold expansion Surface micro-mrofile Simulation analysis Stress concentration factor Fatigue life |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2022.05.011 |
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