SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT)
Fatigue cracks of the welded structure often initiate at the weld toe. Under the complex metallurgical-physical process, the grain sizes and their distribution morphology at the weld toe site show obvious variation. In order to investigate the influence of grain distribution morphology on the fatigu...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Mechanical Strength
2023-01-01
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| Series: | Jixie qiangdu |
| Subjects: | |
| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2023.01.011 |
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| author | HU Ke WEI GuoQian YAN MengYu FENG ZiBin LI AHu |
| author_facet | HU Ke WEI GuoQian YAN MengYu FENG ZiBin LI AHu |
| author_sort | HU Ke |
| collection | DOAJ |
| description | Fatigue cracks of the welded structure often initiate at the weld toe. Under the complex metallurgical-physical process, the grain sizes and their distribution morphology at the weld toe site show obvious variation. In order to investigate the influence of grain distribution morphology on the fatigue behavior of the weld toe short cracks, metallographic tests were carried out for different areas of the weld toe for the cruciform joint specimen to obtain the average grain sizes of the coarse-grain region and the fine-grain region. Two-dimensional representative volume element（RVE） models considering grain distribution morphology were constructed. Based on FIP parameters and McDowell model, the nucleation and fatigue propagation behavior of the weld toe short cracks with different grain distribution morphology were simulated. The results showed that grain size and orientation are important factors influencing the nucleation behavior of the weld toe short cracks. The grain distribution morphology has little effect on the early behavior of short cracks, but the effect is gradually significant with the cracks propagating to a certain threshold length. In general, the fine-to-coarse grain transition mode can reduce the growth rate of short cracks. |
| format | Article |
| id | doaj-art-9064cad9ccfe42a8a086e4dbc5f3c9bf |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2023-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-9064cad9ccfe42a8a086e4dbc5f3c9bf2025-01-15T02:40:35ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692023-01-01849036351437SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT)HU KeWEI GuoQianYAN MengYuFENG ZiBinLI AHuFatigue cracks of the welded structure often initiate at the weld toe. Under the complex metallurgical-physical process, the grain sizes and their distribution morphology at the weld toe site show obvious variation. In order to investigate the influence of grain distribution morphology on the fatigue behavior of the weld toe short cracks, metallographic tests were carried out for different areas of the weld toe for the cruciform joint specimen to obtain the average grain sizes of the coarse-grain region and the fine-grain region. Two-dimensional representative volume element（RVE） models considering grain distribution morphology were constructed. Based on FIP parameters and McDowell model, the nucleation and fatigue propagation behavior of the weld toe short cracks with different grain distribution morphology were simulated. The results showed that grain size and orientation are important factors influencing the nucleation behavior of the weld toe short cracks. The grain distribution morphology has little effect on the early behavior of short cracks, but the effect is gradually significant with the cracks propagating to a certain threshold length. In general, the fine-to-coarse grain transition mode can reduce the growth rate of short cracks.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2023.01.011Grain distribution morphologyShort weld toe cracksCrack nucleationCrack fatigue propagationRVE model |
| spellingShingle | HU Ke WEI GuoQian YAN MengYu FENG ZiBin LI AHu SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT) Jixie qiangdu Grain distribution morphology Short weld toe cracks Crack nucleation Crack fatigue propagation RVE model |
| title | SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT) |
| title_full | SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT) |
| title_fullStr | SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT) |
| title_full_unstemmed | SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT) |
| title_short | SIMULATION OF EFFECTS OF GRAIN DISTRIBUTION MORPHOLOGY ON FATIGUE BEHAVIOR OF SHORT CRACKS AT WELD TOE (MT) |
| title_sort | simulation of effects of grain distribution morphology on fatigue behavior of short cracks at weld toe mt |
| topic | Grain distribution morphology Short weld toe cracks Crack nucleation Crack fatigue propagation RVE model |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2023.01.011 |
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