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The microscopic deformation mechanism of 3D graphene foam materials under uniaxial compression
Wang C(王超); Zhang C; Chen SH(陈少华); Chen, SH (reprint author), Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China.
Source PublicationCARBON
2016
Volume109Pages:666-672
ISSN0008-6223
AbstractRecent experiments have shown that the graphene foam material exhibits a rubber-like constitutive behavior and a near-zero Poisson's ratio. We have performed coarse grain molecular dynamics simulations, which show that these intriguing phenomena can be attributed to the microstructure deformation, rearrangement and compaction in three stages, respectively. The elastic deformation of microstructures leads to the initial linear behavior of the graphene foam material. Microstructure rearrangement, including bending, self-folding and flake-rotation, should be responsible for the second stage with a good performance of deformation but with a low bearing capacity. Microstructure compaction leads to a high bearing capacity at the last stage. A near-zero Poisson's ratio of the material within a certain range of compressive strain is also found to be due to the microstructure rearrangement, which induces soft flakes to fill the empty space without volume expansion in the other directions. Furthermore, it demonstrates that Poisson's ratio of such a type of material can be further tuned by the stiffness of graphene flakes as well as the amplitude of external strain. This study highlights the promise of graphene foam materials for energy absorption and dissipation under extreme conditions. (C) 2016 Elsevier Ltd. All rights reserved.
DOI10.1016/j.carbon.2016.08.084
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000385900100074
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationThe work reported here is supported by NSFC through Grants #11532013, #11372317, #11502150 and the 973 Nano-project (2012CB937500).
DepartmentLNM仿生材料与固体的微尺度力学
Classification一类
RankingTrue
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59701
Collection非线性力学国家重点实验室
Corresponding AuthorChen, SH (reprint author), Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China.
Recommended Citation
GB/T 7714
Wang C,Zhang C,Chen SH,et al. The microscopic deformation mechanism of 3D graphene foam materials under uniaxial compression[J]. CARBON,2016,109:666-672.
APA 王超,Zhang C,陈少华,&Chen, SH .(2016).The microscopic deformation mechanism of 3D graphene foam materials under uniaxial compression.CARBON,109,666-672.
MLA 王超,et al."The microscopic deformation mechanism of 3D graphene foam materials under uniaxial compression".CARBON 109(2016):666-672.
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