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Energy dissipative mechanism of graphene foam materials
Wang C(王超); Pan DX(潘斗兴); Chen SH(陈少华)
2018-06-01
发表期刊CARBON
卷号132页码:641-650
ISSN0008-6223
摘要Graphene foam (GrF) is a new kind of multi-porous material with many potential applications owing to its excellent multi-functional properties, especially its dissipation capability. However, both the dissipative mechanism and some experimental phenomena remain poorly understood. Here, systematic coarse-grained molecular dynamic simulations (CGMD) are conducted to study these issues. The typical stress-strain relationships found in experiments under large-strain loading-unloading and small-strain cyclic load are first reproduced. Based on microstructure analysis, three major dissipative mechanisms in the scale of flakes, i.e., rippling, sliding and impacting, are uncovered. The influencing effects of cycle number, strain magnitude and loading rate on dissipation are further investigated. It is found that the much higher dissipation in the first loading cycle is essentially due to drastic flake rearrangements, which decreases to a smaller one in subsequent cycles. In addition, the dissipation increases almost linearly with the strain magnitude in the first cycle, while it increases with a reduced slope in subsequent cycles due to the flake stacking structures. For a given strain magnitude, the dissipation will be enhanced as the loading rate increases. These results deepen our understanding on the dissipative mechanism of GrFs and should be helpful for the development of novel multi-functional graphene-based composites. (c) 2018 Elsevier Ltd. All rights reserved.
关键词Graphene foam material Energy dissipative mechanism Coarse-grained molecular dynamic method Stress-strain curve Microstructural evolution
DOI10.1016/j.carbon.2018.02.085
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000428233000069
关键词[WOS]CHEMICAL-VAPOR-DEPOSITION ; COARSE-GRAINED MODEL ; MULTILAYER GRAPHENE ; SPONGY GRAPHENE ; POISSONS RATIO ; AEROGELS ; NETWORKS ; BEHAVIOR
WOS研究方向Chemistry, Physical ; Materials Science, Multidisciplinary
WOS类目Chemistry ; Materials Science
项目资助者NSFC [11602270, 11532013, 11372317] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040503] ; BIT Creative Research Plan
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力学所作者排名1
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77907
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Adv Mfg Technol, Changzhou 213164, Peoples R China
3.Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China
4.Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China
5.Beijing Inst Technol, Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China
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Wang C,Pan DX,Chen SH. Energy dissipative mechanism of graphene foam materials[J]. CARBON,2018,132:641-650.
APA 王超,潘斗兴,&陈少华.(2018).Energy dissipative mechanism of graphene foam materials.CARBON,132,641-650.
MLA 王超,et al."Energy dissipative mechanism of graphene foam materials".CARBON 132(2018):641-650.
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