LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE
For cross welded joints, the behavior of microscopic short crack nucleation and early propagation of the weld toe was studied. Using the Voronoi method, a representative element（RE） with a side length of 150μm at the weld toe was established. Based on the distribution characteristics of the fatigue...
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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.1001.9669.2021.06.023 |
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| author | CHENG LiFu WEI GuoQian HU Ke JIANG YongSheng |
| author_facet | CHENG LiFu WEI GuoQian HU Ke JIANG YongSheng |
| author_sort | CHENG LiFu |
| collection | DOAJ |
| description | For cross welded joints, the behavior of microscopic short crack nucleation and early propagation of the weld toe was studied. Using the Voronoi method, a representative element（RE） with a side length of 150μm at the weld toe was established. Based on the distribution characteristics of the fatigue indicator parameter（FIP）, the fatigue life between FIP and microscopic short crack was constructed.The nucleation of microscopic short crack and their early propagation life were calculated. The results show that the calculated life of weld toe microscopic short crack nucleation and its early propagation is more consistent with the test life data, indicating the applicability of this calculation method; the calculated life of microscopic short crack nucleation and its early expansion accounted for a larger ratio of the overall fatigue life, so it has a non-negligible impact; affected by the microstructure of the grains, the propagation path of the early cracks presents an obvious tortuous shape. |
| format | Article |
| id | doaj-art-5ceadfd1072c4710ba6e870227757eea |
| 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-5ceadfd1072c4710ba6e870227757eea2025-01-15T02:25:05ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692021-01-01431436144130612297LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOECHENG LiFuWEI GuoQianHU KeJIANG YongShengFor cross welded joints, the behavior of microscopic short crack nucleation and early propagation of the weld toe was studied. Using the Voronoi method, a representative element（RE） with a side length of 150μm at the weld toe was established. Based on the distribution characteristics of the fatigue indicator parameter（FIP）, the fatigue life between FIP and microscopic short crack was constructed.The nucleation of microscopic short crack and their early propagation life were calculated. The results show that the calculated life of weld toe microscopic short crack nucleation and its early propagation is more consistent with the test life data, indicating the applicability of this calculation method; the calculated life of microscopic short crack nucleation and its early expansion accounted for a larger ratio of the overall fatigue life, so it has a non-negligible impact; affected by the microstructure of the grains, the propagation path of the early cracks presents an obvious tortuous shape.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2021.06.023Microscopic short crackCrack nucleationEarly expansionGrain model |
| spellingShingle | CHENG LiFu WEI GuoQian HU Ke JIANG YongSheng LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE Jixie qiangdu Microscopic short crack Crack nucleation Early expansion Grain model |
| title | LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE |
| title_full | LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE |
| title_fullStr | LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE |
| title_full_unstemmed | LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE |
| title_short | LIFE SIMULATION OF MICROSCOPIC SHORT CRACK NUCLEATION AND EARLY PROPAGATION OF WELD TOE |
| title_sort | life simulation of microscopic short crack nucleation and early propagation of weld toe |
| topic | Microscopic short crack Crack nucleation Early expansion Grain model |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2021.06.023 |
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