Microscopic deformation mechanism of inelasticity in graphene foams under quasi-static tension and compression
文献类型：期刊论文
| 作者 | Yang, Tian5; Li, Shuang4,5; Shi, Yixiang5; Wang C(王超)2,3 ; Hao, Peixuan1,5
|
| 刊名 | COMPUTATIONAL MATERIALS SCIENCE
 |
| 出版日期 | 2025-01-31 |
| 卷号 | 247页码:11 |
| 关键词 | Graphene foam Inelasticity Coarse-grained molecular dynamics Microscopic deformation mechanism |
| ISSN号 | 0927-0256 |
| DOI | 10.1016/j.commatsci.2024.113556 |
| 通讯作者 | Wang, Chao(wangchao@lnm.imech.ac.cn) ; Hao, Peixuan(haopx1216@163.com) |
| 英文摘要 | The unique porous structure and exceptional elasticity of graphene foams (GrFs) qualify them as prime candidates for various applications. However, the claim of their super-elasticity under compressive strains up to 90% is ambiguous, as the super-elastic behavior is accompanied by inelastic phenomena such as plasticity and micro scale damage. This study systematically investigated the microscopic deformation mechanisms underlying the inelasticity of GrFs under both tension and compression using numerical experiments based on the coarse grained molecular dynamics method. The "non-uniformity of deformation" parameter is proposed, and it revealed a two-stage deformation process characterized by nonlocalized and localized inelasticity. When the GrFs were subjected to tensile strains below a critical threshold, irreversible microstructural deformation resulted in nonlocalized inelasticity. Beyond this threshold, inelasticity was predominantly driven by localized plastic deformation and damage caused by bond breakages at the fracture interface. In contrast, only nonlocalized inelasticity occurred during the compression process. Furthermore, the results indicated that when nonlocalized inelasticity occurred, a negative correlation between the crosslink densities and the number of graphene layers existed. These results can deepen our understanding of the deformation properties of GrFs, which is crucial for their design and application. |
| 分类号 | 二类 |
| WOS关键词 | FRACTURE MODE ; AEROGEL ; TEMPERATURE ; NANOTUBES ; BEHAVIOR |
| 资助项目 | Engineering, Tsinghua University ; National High-Level Talents Special Support Plan |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001371620000001 |
| 资助机构 | Engineering, Tsinghua University ; National High-Level Talents Special Support Plan |
| 其他责任者 | Wang, Chao ; Hao, Peixuan |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97765]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Inner Mongolia Acad Sci & Technol, Green Hydrogen Technol Equipment & Applicat Res Ct, Hohhot 014010, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 4.Tsinghua Univ, Shanxi Res Inst Clean Energy, Taiyuan 030032, Peoples R China; 5.Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Yang, Tian,Li, Shuang,Shi, Yixiang,et al. Microscopic deformation mechanism of inelasticity in graphene foams under quasi-static tension and compression[J]. COMPUTATIONAL MATERIALS SCIENCE,2025,247:11. |
| APA | Yang, Tian,Li, Shuang,Shi, Yixiang,王超,&Hao, Peixuan.(2025).Microscopic deformation mechanism of inelasticity in graphene foams under quasi-static tension and compression.COMPUTATIONAL MATERIALS SCIENCE,247,11. |
| MLA | Yang, Tian,et al."Microscopic deformation mechanism of inelasticity in graphene foams under quasi-static tension and compression".COMPUTATIONAL MATERIALS SCIENCE 247(2025):11. |
入库方式： OAI收割
来源：力学研究所
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