Crosslink-tuned large-deformation behavior and fracture mode in buckypapers | |
Yang T(杨田)1,2; Wang C(王超)1,2; Wu ZB(武作兵)1,2 | |
发表期刊 | CARBON |
2020-04-15 | |
卷号 | 159页码:412-421 |
ISSN | 0008-6223 |
摘要 | Strong physical and/or chemical inter-tube crosslinks play a vital role in carbon nanotube buckypapers and composites. However, both underlying mechanisms and regulation patterns remain poorly understood. Here, we employed the coarse-grained molecular dynamics simulations to investigate the nonlinear large-deformation behavior and the fracture mode of crosslinked buckypapers by considering both intrinsic intra- and inter-tube bond-breaking. A critical crosslink density rho(c) is found to divide the deformation mode of buckypaper into two regimes in uniaxial tension, i.e., the bending-dominated mode at rho < rho(c) and the bending-stretching-bending three-stage one at rho > rho(c). This transition is attributed to the stress concentration and the intrinsic bond-breaking in large tensile deformations. In uniaxial compression, it is always bending-dominated, which is independent of crosslinks and compressive strain. Furthermore, there exists another critical crosslink density controlling the ductile-brittle transition of fracture mode of the strongly-crosslinked buckypaper, which is explained from the viewpoint of the collective hierarchical microstructural evolution. This study provides a profound understanding of crosslink effect on the buckypaper, which is of great significance for the optimization design and further practical applications of the promising material. (C) 2019 Elsevier Ltd. All rights reserved. |
关键词 | Strongly-crosslinked buckypaper Crosslink Deformation mode Ductile-brittle transition Coarse-grained molecular dynamics |
DOI | 10.1016/j.carbon.2019.12.037 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000514195100045 |
关键词[WOS] | CARBON NANOTUBE NETWORKS ; MECHANICAL-PROPERTIES ; MICROSTRUCTURAL EVOLUTION ; BUCKY PAPER ; THIN-FILMS ; STRENGTH ; ENHANCEMENT ; SHEETS |
WOS研究方向 | Chemistry ; Materials Science |
WOS类目 | Chemistry, Physical ; Materials Science, Multidisciplinary |
资助项目 | National Natural Science Foundation of China[11602270] ; National Natural Science Foundation of China[11972348] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040403] |
项目资助者 | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
论文分区 | 一类 |
力学所作者排名 | 1 |
RpAuthor | 王超,武作兵 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/81784 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Wang C(王超); Wu ZB(武作兵) |
作者单位 | 1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Yang T,Wang C,Wu ZB. Crosslink-tuned large-deformation behavior and fracture mode in buckypapers[J]. CARBON,2020,159:412-421. |
APA | Yang T,Wang C,&Wu ZB.(2020).Crosslink-tuned large-deformation behavior and fracture mode in buckypapers.CARBON,159,412-421. |
MLA | Yang T,et al."Crosslink-tuned large-deformation behavior and fracture mode in buckypapers".CARBON 159(2020):412-421. |
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