Anisotropic mechanics of cell-elongated structures: Finite element study based on a 3D cellular model
文献类型：期刊论文
| 作者 | Wang, Shaohua2; Zhu, Yudong2; Yu, Jilin2; Wang, Liu1,2; Zheng, Zhijun1,2
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| 刊名 | THIN-WALLED STRUCTURES
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| 出版日期 | 2024-12-01 |
| 卷号 | 205页码:14 |
| 关键词 | Cell-elongated structures Anisotropic mechanics Voronoi foam Elongation ratio Deformation modes |
| ISSN号 | 0263-8231 |
| DOI | 10.1016/j.tws.2024.112405 |
| 通讯作者 | Wang, Liu(wangliu05@ustc.edu.cn) ; Zheng, Zhijun(zjzheng@ustc.edu.cn) |
| 英文摘要 | Cell-elongated structures present designable anisotropic behaviors by controlling the ratio and angle of elongation, but the relationship between geometric anisotropy and mechanical anisotropy remains poorly understood. In this study, a construction method based on the 3D Voronoi technique is employed to generate cell-elongated structures with different elongation ratios and angles, and their anisotropic compression behaviors are investigated using a 3D cellular model. The stress-strain curves can be categorized into four stages, including elasticity, initial collapse followed by strain-softening, plateau, and densification, which are accurately described by a statistical constitutive model. Our finding reveals that the mechanical properties and deformation modes of the cell-elongated structures are significantly influenced by the anisotropic angle. At an anisotropic angle of 0 degrees, randomly distributed collapse bands due to shell buckling interact with each other during compression, enhancing the load-carrying and energy-absorbing capacities. Conversely, at 90 degrees, the cells deform primarily through a stable bending mode, leading to reduced stress and a lower Poisson's ratio. At 45 degrees, collapse bands appear on both sides of the sample with rotation and buckling being the dominant deformation mode, resulting in a sandwich-like structure featuring an uncollapsed central zone due to a combined compression-shear stress state. Compared with the isotropic foam, the structure elongated in thickness direction exhibits a notable increase in impact resistance under a spherical bullet. This work demonstrates the potential to engineer anisotropic cellular materials with tailored mechanical properties and deformation modes through strategic geometric anisotropy design. |
| WOS关键词 | TRANSVERSELY ISOTROPIC FOAMS ; CONSTITUTIVE MODEL ; METAL FOAMS ; DEFECTS |
| 资助项目 | National Natural Science Founda-tion of China[12425210] ; National Natural Science Founda-tion of China[11872360] ; National Natural Science Founda-tion of China[12272369] ; Postdoctoral Fellowship Program of CPSF[GZC20232552] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001311656400001 |
| 资助机构 | National Natural Science Founda-tion of China ; Postdoctoral Fellowship Program of CPSF |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/96560]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Wang, Liu; Zheng, Zhijun |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China 2.Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shaohua,Zhu, Yudong,Yu, Jilin,et al. Anisotropic mechanics of cell-elongated structures: Finite element study based on a 3D cellular model[J]. THIN-WALLED STRUCTURES,2024,205:14. |
| APA | Wang, Shaohua,Zhu, Yudong,Yu, Jilin,Wang, Liu,&Zheng, Zhijun.(2024).Anisotropic mechanics of cell-elongated structures: Finite element study based on a 3D cellular model.THIN-WALLED STRUCTURES,205,14. |
| MLA | Wang, Shaohua,et al."Anisotropic mechanics of cell-elongated structures: Finite element study based on a 3D cellular model".THIN-WALLED STRUCTURES 205(2024):14. |
入库方式： OAI收割
来源：力学研究所
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