EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT
Due to the high stress concentration of spot welding joints, it is very easy to initiate fatigue cracks at the edge of the nugget, and the residual stress produced by spot welding will affect its propagation. To explore the influence of spot welding residual stress on fatigue crack propagation, a th...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Mechanical Strength
2024-04-01
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| Series: | Jixie qiangdu |
| Subjects: | |
| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2024.02.024 |
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| _version_ | 1841534123502469120 |
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| author | LUO JiaYuan LI Xin TAN Chao |
| author_facet | LUO JiaYuan LI Xin TAN Chao |
| author_sort | LUO JiaYuan |
| collection | DOAJ |
| description | Due to the high stress concentration of spot welding joints, it is very easy to initiate fatigue cracks at the edge of the nugget, and the residual stress produced by spot welding will affect its propagation. To explore the influence of spot welding residual stress on fatigue crack propagation, a three-dimensional finite element simulation model of DP600 high strength steel spot welding joint was established. Based on the thermal-elastic-plastic theory, the residual stress field of spot welding was solved. On this basis, the local stress intensitv factor (SIF) solution of the kinked crack with and without residual stress was calculated. By analvzing the variation curve of the local stress intensity factor at the deepest point of the crack with the crack depth ratio under the two conditions, the influence of residual stress of spot welding on the propagation of kinked crack was studied. Based on the fracture mechanics theory, the improved two-parameter model is used to predict the fatigue life wit th and without residual stress. The results show that the residual stress of spot welding significantly increases the local stress intensity factor, and the influence of residual stress on it increases with the increase of crack depth ratio. Considering the residual stress, the overall crack propagation trend remains unchanged but the propagation rate increases significantly, and the fatigue life decreases from 35 616 times to 12 564 times. |
| format | Article |
| id | doaj-art-ddca5a5822c7437da0c12688946cc9ab |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2024-04-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-ddca5a5822c7437da0c12688946cc9ab2025-01-15T02:45:29ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692024-04-014643944563929678EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINTLUO JiaYuanLI XinTAN ChaoDue to the high stress concentration of spot welding joints, it is very easy to initiate fatigue cracks at the edge of the nugget, and the residual stress produced by spot welding will affect its propagation. To explore the influence of spot welding residual stress on fatigue crack propagation, a three-dimensional finite element simulation model of DP600 high strength steel spot welding joint was established. Based on the thermal-elastic-plastic theory, the residual stress field of spot welding was solved. On this basis, the local stress intensitv factor (SIF) solution of the kinked crack with and without residual stress was calculated. By analvzing the variation curve of the local stress intensity factor at the deepest point of the crack with the crack depth ratio under the two conditions, the influence of residual stress of spot welding on the propagation of kinked crack was studied. Based on the fracture mechanics theory, the improved two-parameter model is used to predict the fatigue life wit th and without residual stress. The results show that the residual stress of spot welding significantly increases the local stress intensity factor, and the influence of residual stress on it increases with the increase of crack depth ratio. Considering the residual stress, the overall crack propagation trend remains unchanged but the propagation rate increases significantly, and the fatigue life decreases from 35 616 times to 12 564 times.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2024.02.024Spot welding residual stressKinked crackStress intensity factorFatigue life |
| spellingShingle | LUO JiaYuan LI Xin TAN Chao EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT Jixie qiangdu Spot welding residual stress Kinked crack Stress intensity factor Fatigue life |
| title | EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT |
| title_full | EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT |
| title_fullStr | EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT |
| title_full_unstemmed | EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT |
| title_short | EFFECT OF WELDING RESIDUAL STRESS ON CRACK PROPAGATION AND FATIGUE PERFORMANCE OF HIGH STRENGTH STEEL SPOT WELDING JOINT |
| title_sort | effect of welding residual stress on crack propagation and fatigue performance of high strength steel spot welding joint |
| topic | Spot welding residual stress Kinked crack Stress intensity factor Fatigue life |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2024.02.024 |
| work_keys_str_mv | AT luojiayuan effectofweldingresidualstressoncrackpropagationandfatigueperformanceofhighstrengthsteelspotweldingjoint AT lixin effectofweldingresidualstressoncrackpropagationandfatigueperformanceofhighstrengthsteelspotweldingjoint AT tanchao effectofweldingresidualstressoncrackpropagationandfatigueperformanceofhighstrengthsteelspotweldingjoint |