FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings
Walnut shell breaking is an important aspect of post-harvest processing. However, shell-breaking results differ significantly from ideal uniaxial compression results. In this paper, the effect of multipoint loading on the walnut shell-breaking mechanism by combining FDEM with cohesive elements was i...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2023.1293683/full |
| _version_ | 1797658861119733760 |
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| author | Bowen Han Gege Su Yong Zeng Yong Zeng Yong Zeng Jialong Yang Xiuwen Fan Xiuwen Fan Xiuwen Fan Yongcheng Zhang Yongcheng Zhang Yongcheng Zhang Hong Zhang Hong Zhang Hong Zhang Jianping Wang Jianping Wang Jianping Wang |
| author_facet | Bowen Han Gege Su Yong Zeng Yong Zeng Yong Zeng Jialong Yang Xiuwen Fan Xiuwen Fan Xiuwen Fan Yongcheng Zhang Yongcheng Zhang Yongcheng Zhang Hong Zhang Hong Zhang Hong Zhang Jianping Wang Jianping Wang Jianping Wang |
| author_sort | Bowen Han |
| collection | DOAJ |
| description | Walnut shell breaking is an important aspect of post-harvest processing. However, shell-breaking results differ significantly from ideal uniaxial compression results. In this paper, the effect of multipoint loading on the walnut shell-breaking mechanism by combining FDEM with cohesive elements was investigated. The model for walnuts was created using micro-X-ray CT scans and experimental data. Simulation parameters describing mechanical properties were calibrated through modeling the uniaxial compression experiment. The loading point locations were quantitatively described in terms of top and azimuthal angles. The results show that the crack ex-tension rate increases with the number of loading points and the singularity value, and the maximum value of the four-point loading speed is about 450 m/s. The number of cracks is only related to the number of loading points and is not related to the location of the loading point. In addition, three loading methods are proposed, and the fastest crack propagation rate is achieved when the azimuthal angle of four-point loading is 0, 150, 180, and 330, respectively. These findings may serve as a theoretical foundation for studying shell crushing. |
| first_indexed | 2024-03-11T18:06:28Z |
| format | Article |
| id | doaj.art-b45e9e03cfb54858b28bcd84727a0a08 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-03-11T18:06:28Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-b45e9e03cfb54858b28bcd84727a0a082023-10-17T07:38:27ZengFrontiers Media S.A.Frontiers in Materials2296-80162023-10-011010.3389/fmats.2023.12936831293683FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadingsBowen Han0Gege Su1Yong Zeng2Yong Zeng3Yong Zeng4Jialong Yang5Xiuwen Fan6Xiuwen Fan7Xiuwen Fan8Yongcheng Zhang9Yongcheng Zhang10Yongcheng Zhang11Hong Zhang12Hong Zhang13Hong Zhang14Jianping Wang15Jianping Wang16Jianping Wang17College of Mechanical Electrification Engineering, Tarim University, Alar, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaKey Laboratory of Modern Agricultural Engineering, Tarim University, Alar, Xinjiang, ChinaKey Laboratory of Tarim Oasis Agriculture (Tarim University), Ministry of Education, Alar, Xinjiang, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaKey Laboratory of Modern Agricultural Engineering, Tarim University, Alar, Xinjiang, ChinaKey Laboratory of Tarim Oasis Agriculture (Tarim University), Ministry of Education, Alar, Xinjiang, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaKey Laboratory of Modern Agricultural Engineering, Tarim University, Alar, Xinjiang, ChinaKey Laboratory of Tarim Oasis Agriculture (Tarim University), Ministry of Education, Alar, Xinjiang, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaKey Laboratory of Modern Agricultural Engineering, Tarim University, Alar, Xinjiang, ChinaKey Laboratory of Tarim Oasis Agriculture (Tarim University), Ministry of Education, Alar, Xinjiang, ChinaCollege of Mechanical Electrification Engineering, Tarim University, Alar, ChinaKey Laboratory of Modern Agricultural Engineering, Tarim University, Alar, Xinjiang, ChinaKey Laboratory of Tarim Oasis Agriculture (Tarim University), Ministry of Education, Alar, Xinjiang, ChinaWalnut shell breaking is an important aspect of post-harvest processing. However, shell-breaking results differ significantly from ideal uniaxial compression results. In this paper, the effect of multipoint loading on the walnut shell-breaking mechanism by combining FDEM with cohesive elements was investigated. The model for walnuts was created using micro-X-ray CT scans and experimental data. Simulation parameters describing mechanical properties were calibrated through modeling the uniaxial compression experiment. The loading point locations were quantitatively described in terms of top and azimuthal angles. The results show that the crack ex-tension rate increases with the number of loading points and the singularity value, and the maximum value of the four-point loading speed is about 450 m/s. The number of cracks is only related to the number of loading points and is not related to the location of the loading point. In addition, three loading methods are proposed, and the fastest crack propagation rate is achieved when the azimuthal angle of four-point loading is 0, 150, 180, and 330, respectively. These findings may serve as a theoretical foundation for studying shell crushing.https://www.frontiersin.org/articles/10.3389/fmats.2023.1293683/fullmulti-point loadingwalnuts crushFDEMcohesivecrack expansion |
| spellingShingle | Bowen Han Gege Su Yong Zeng Yong Zeng Yong Zeng Jialong Yang Xiuwen Fan Xiuwen Fan Xiuwen Fan Yongcheng Zhang Yongcheng Zhang Yongcheng Zhang Hong Zhang Hong Zhang Hong Zhang Jianping Wang Jianping Wang Jianping Wang FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings Frontiers in Materials multi-point loading walnuts crush FDEM cohesive crack expansion |
| title | FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings |
| title_full | FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings |
| title_fullStr | FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings |
| title_full_unstemmed | FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings |
| title_short | FDEM investigation on the crack propagation characteristics of walnut shell under multi-contact loadings |
| title_sort | fdem investigation on the crack propagation characteristics of walnut shell under multi contact loadings |
| topic | multi-point loading walnuts crush FDEM cohesive crack expansion |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2023.1293683/full |
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