A fatigue life analysis of weld cracks in large openings coaming with cone shell
ObjectiveThis paper analyses the fatigue life of weld cracks in a large opening coaming with a conical shell under uniform pressure load. MethodsFirst, a finite element model of an underwater pressure-hull structure is built. Next, the peril point and its fatigue life are calculated using the struct...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Editorial Office of Chinese Journal of Ship Research
2023-08-01
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| Series: | Zhongguo Jianchuan Yanjiu |
| Subjects: | |
| Online Access: | http://www.ship-research.com/en/article/doi/10.19693/j.issn.1673-3185.03059 |
| _version_ | 1797692562244370432 |
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| author | Huangyin WANG JUN MA Liming GENG |
| author_facet | Huangyin WANG JUN MA Liming GENG |
| author_sort | Huangyin WANG |
| collection | DOAJ |
| description | ObjectiveThis paper analyses the fatigue life of weld cracks in a large opening coaming with a conical shell under uniform pressure load. MethodsFirst, a finite element model of an underwater pressure-hull structure is built. Next, the peril point and its fatigue life are calculated using the structural strain method. Finally, the accuracy of the structural strain method used in the fatigue life evaluation of the underwater pressure-hull structure is verified through a comparison with the calculated results of the experimental data model.ResultsThe results show that the maximum structural stress is located at the weld of the coaming near the large end, which is the same as the appearance location of fatigue cracks in the experiment. The fatigue life calculated using the structural strain method shows good agreement with the experimental results, and the data of the model fatigue experiment is located in a narrow band of the master e-N curve. The normal structural stress is far greater than the shear structural stress at the peril point of the coaming weld. ConclusionsThe structural strain method can effectively solve problems with the fatigue life of weld cracks in a large opening coaming with a conical shell. Under the load conditions of this paper, the initial crack at the peril point should be type one. |
| first_indexed | 2024-03-12T02:29:24Z |
| format | Article |
| id | doaj.art-dfe990b85347431db8536aa3f67d392a |
| institution | Directory Open Access Journal |
| issn | 1673-3185 |
| language | English |
| last_indexed | 2024-03-12T02:29:24Z |
| publishDate | 2023-08-01 |
| publisher | Editorial Office of Chinese Journal of Ship Research |
| record_format | Article |
| series | Zhongguo Jianchuan Yanjiu |
| spelling | doaj.art-dfe990b85347431db8536aa3f67d392a2023-09-05T09:18:25ZengEditorial Office of Chinese Journal of Ship ResearchZhongguo Jianchuan Yanjiu1673-31852023-08-0118424225010.19693/j.issn.1673-3185.03059ZG3059A fatigue life analysis of weld cracks in large openings coaming with cone shellHuangyin WANG0JUN MA1Liming GENG2China Ship Development and Design Center, Wuhan 430064, ChinaProject Management Center, Naval Armament Department of PLAN, Beijing 100071, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaObjectiveThis paper analyses the fatigue life of weld cracks in a large opening coaming with a conical shell under uniform pressure load. MethodsFirst, a finite element model of an underwater pressure-hull structure is built. Next, the peril point and its fatigue life are calculated using the structural strain method. Finally, the accuracy of the structural strain method used in the fatigue life evaluation of the underwater pressure-hull structure is verified through a comparison with the calculated results of the experimental data model.ResultsThe results show that the maximum structural stress is located at the weld of the coaming near the large end, which is the same as the appearance location of fatigue cracks in the experiment. The fatigue life calculated using the structural strain method shows good agreement with the experimental results, and the data of the model fatigue experiment is located in a narrow band of the master e-N curve. The normal structural stress is far greater than the shear structural stress at the peril point of the coaming weld. ConclusionsThe structural strain method can effectively solve problems with the fatigue life of weld cracks in a large opening coaming with a conical shell. Under the load conditions of this paper, the initial crack at the peril point should be type one.http://www.ship-research.com/en/article/doi/10.19693/j.issn.1673-3185.03059pressure-hull structureopenings coamingwelding jointlow cycle fatiguestructural strain |
| spellingShingle | Huangyin WANG JUN MA Liming GENG A fatigue life analysis of weld cracks in large openings coaming with cone shell Zhongguo Jianchuan Yanjiu pressure-hull structure openings coaming welding joint low cycle fatigue structural strain |
| title | A fatigue life analysis of weld cracks in large openings coaming with cone shell |
| title_full | A fatigue life analysis of weld cracks in large openings coaming with cone shell |
| title_fullStr | A fatigue life analysis of weld cracks in large openings coaming with cone shell |
| title_full_unstemmed | A fatigue life analysis of weld cracks in large openings coaming with cone shell |
| title_short | A fatigue life analysis of weld cracks in large openings coaming with cone shell |
| title_sort | fatigue life analysis of weld cracks in large openings coaming with cone shell |
| topic | pressure-hull structure openings coaming welding joint low cycle fatigue structural strain |
| url | http://www.ship-research.com/en/article/doi/10.19693/j.issn.1673-3185.03059 |
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