Wrinkling of Toroidal Shells in Free Hydroforming
In this study, we investigated toroidal shell wrinkling in free hydroforming. We specifically focused on toroidal shells with a regular hexagonal cross-section. Membrane theory was used to examine the distribution of stress and yield load in both preform and toroidal shells. The wrinkling moment was...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/12/1/89 |
| _version_ | 1797343293126737920 |
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| author | Xiaobin Liu Jian Zhang Ming Zhan Xilu Zhao Wenwei Wu Kaiwei Xu |
| author_facet | Xiaobin Liu Jian Zhang Ming Zhan Xilu Zhao Wenwei Wu Kaiwei Xu |
| author_sort | Xiaobin Liu |
| collection | DOAJ |
| description | In this study, we investigated toroidal shell wrinkling in free hydroforming. We specifically focused on toroidal shells with a regular hexagonal cross-section. Membrane theory was used to examine the distribution of stress and yield load in both preform and toroidal shells. The wrinkling moment was then predicted using an empirical formula of shell buckling. In addition, the wrinkling state was investigated using a general statics method, and the free hydroforming of toroidal shells was simulated using the Riks method. Subsequently, nonlinear buckling and equilibrium paths were analyzed. A toroidal preform was manufactured, and free hydroforming experiments were conducted. Overall, the experimental results confirmed the accuracy of the theoretical predictions and numerical simulations. This indicates that the prediction method used in the study was effective. We also found that wrinkling occurs during hydroforming in the inner region of toroidal shells due to compressive stress. Consequently, we improved the structure of the toroidal shells and performed analytical calculations and numerical simulations for the analysis. Our results indicate that wrinkling can be eliminated by increasing the number of segments on the inner side of toroidal preforms, thereby improving the quality of toroidal shells. |
| first_indexed | 2024-03-08T10:46:33Z |
| format | Article |
| id | doaj.art-bb671469bb0f4cdca49840e8f70d844d |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-08T10:46:33Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-bb671469bb0f4cdca49840e8f70d844d2024-01-26T17:15:40ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-01-011218910.3390/jmse12010089Wrinkling of Toroidal Shells in Free HydroformingXiaobin Liu0Jian Zhang1Ming Zhan2Xilu Zhao3Wenwei Wu4Kaiwei Xu5School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaSchool of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaCollege of Mechanical Engineering, Saitama Institute of Technology, Saitama 3690293, JapanChina Ship Scientific Research Center, Wuxi 214082, ChinaChina Ship Scientific Research Center, Wuxi 214082, ChinaIn this study, we investigated toroidal shell wrinkling in free hydroforming. We specifically focused on toroidal shells with a regular hexagonal cross-section. Membrane theory was used to examine the distribution of stress and yield load in both preform and toroidal shells. The wrinkling moment was then predicted using an empirical formula of shell buckling. In addition, the wrinkling state was investigated using a general statics method, and the free hydroforming of toroidal shells was simulated using the Riks method. Subsequently, nonlinear buckling and equilibrium paths were analyzed. A toroidal preform was manufactured, and free hydroforming experiments were conducted. Overall, the experimental results confirmed the accuracy of the theoretical predictions and numerical simulations. This indicates that the prediction method used in the study was effective. We also found that wrinkling occurs during hydroforming in the inner region of toroidal shells due to compressive stress. Consequently, we improved the structure of the toroidal shells and performed analytical calculations and numerical simulations for the analysis. Our results indicate that wrinkling can be eliminated by increasing the number of segments on the inner side of toroidal preforms, thereby improving the quality of toroidal shells.https://www.mdpi.com/2077-1312/12/1/89wrinklingtoroidal shellfree hydroformingbuckling |
| spellingShingle | Xiaobin Liu Jian Zhang Ming Zhan Xilu Zhao Wenwei Wu Kaiwei Xu Wrinkling of Toroidal Shells in Free Hydroforming Journal of Marine Science and Engineering wrinkling toroidal shell free hydroforming buckling |
| title | Wrinkling of Toroidal Shells in Free Hydroforming |
| title_full | Wrinkling of Toroidal Shells in Free Hydroforming |
| title_fullStr | Wrinkling of Toroidal Shells in Free Hydroforming |
| title_full_unstemmed | Wrinkling of Toroidal Shells in Free Hydroforming |
| title_short | Wrinkling of Toroidal Shells in Free Hydroforming |
| title_sort | wrinkling of toroidal shells in free hydroforming |
| topic | wrinkling toroidal shell free hydroforming buckling |
| url | https://www.mdpi.com/2077-1312/12/1/89 |
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