| Mechanical Properties and Deformation Mechanisms of Graphene Foams with Bi-Modal Sheet Thickness by Coarse-Grained Molecular Dynamics Simulations | |
Liu, Shenggui1; Lyu, Mindong1; Wang C(王超)2,3
| |
| Corresponding Author | Wang, Chao([email protected]) |
| Source Publication | MATERIALS
 |
| 2021-10-01 | |
| Volume | 14Issue:19Pages:14 |
| Abstract | Graphene foams (GrFs) have been widely used as structural and/or functional materials in many practical applications. They are always assembled by thin and thick graphene sheets with multiple thicknesses; however, the effect of this basic structural feature has been poorly understood by existing theoretical models. Here, we propose a coarse-grained bi-modal GrF model composed of a mixture of 1-layer flexible and 8-layer stiff sheets to study the mechanical properties and deformation mechanisms based on the mesoscopic model of graphene sheets (Model. Simul. Mater. Sci. Eng. 2011, 19, 54003). It is found that the modulus increases almost linearly with an increased proportion of 8-layer sheets, which is well explained by the mixture rule; the strength decreases first and reaches the minimum value at a critical proportion of stiff sheets ~30%, which is well explained by the analysis of structural connectivity and deformation energy of bi-modal GrFs. Furthermore, high-stress regions are mainly dispersed in thick sheets, while large-strain areas mainly locate in thin ones. Both of them have a highly uneven distribution in GrFs due to the intrinsic heterogeneity in both structures and the mechanical properties of sheets. Moreover, the elastic recovery ability of GrFs can be enhanced by adding more thick sheets. These results should be helpful for us to understand and further guide the design of advanced GrF-based materials. |
| Keyword | graphene foam materials microstructure bi-modal sheet thickness stress-strain curve coarse-grained molecular dynamics |
| DOI | 10.3390/ma14195622 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000710351800001 |
| WOS Keyword | SPONGY GRAPHENE ; FIBERS ; AEROGELS ; ULTRALIGHT ; FRAMEWORKS ; NETWORKS |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter |
| Funding Project | NSFC[41472130] ; NSFC[11972348] ; NSFC[11790292] ; National Key Research and Development Program of China[2016YFC0600704] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] |
| Funding Organization | NSFC ; National Key Research and Development Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Wang, Chao |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87787 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China; 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Shenggui,Lyu, Mindong,Wang C. Mechanical Properties and Deformation Mechanisms of Graphene Foams with Bi-Modal Sheet Thickness by Coarse-Grained Molecular Dynamics Simulations[J]. MATERIALS,2021,14,19,:14.Rp_Au:Wang, Chao |
| APA | Liu, Shenggui,Lyu, Mindong,&王超.(2021).Mechanical Properties and Deformation Mechanisms of Graphene Foams with Bi-Modal Sheet Thickness by Coarse-Grained Molecular Dynamics Simulations.MATERIALS,14(19),14. |
| MLA | Liu, Shenggui,et al."Mechanical Properties and Deformation Mechanisms of Graphene Foams with Bi-Modal Sheet Thickness by Coarse-Grained Molecular Dynamics Simulations".MATERIALS 14.19(2021):14. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2021F519.pdf（7393KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment