Microscopic deformation mechanism of inelasticity in graphene foams under quasi-static tension and compression

doi:10.1016/j.commatsci.2024.113556

IMECH-IR > 非线性力学国家重点实验室

	Microscopic deformation mechanism of inelasticity in graphene foams under quasi-static tension and compression
	Yang, Tian 1; Li, Shuang 1,2; Shi, Yixiang 1; Wang C(王超)3,4 ; Hao, Peixuan 1,5
通讯作者	Wang, Chao([email protected]) ; Hao, Peixuan([email protected])
发表期刊	COMPUTATIONAL MATERIALS SCIENCE
	2025-01-31
卷号	247 页码:11
ISSN	0927-0256
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.
关键词	Graphene foam Inelasticity Coarse-grained molecular dynamics Microscopic deformation mechanism
DOI	10.1016/j.commatsci.2024.113556
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001371620000001
关键词[WOS]	FRACTURE MODE ; AEROGEL ; TEMPERATURE ; NANOTUBES ; BEHAVIOR
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
资助项目	Engineering, Tsinghua University ; National High-Level Talents Special Support Plan
项目资助者	Engineering, Tsinghua University ; National High-Level Talents Special Support Plan
论文分区	二类
力学所作者排名	1
RpAuthor	Wang, Chao ; Hao, Peixuan
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/97766
专题	非线性力学国家重点实验室
作者单位	1.Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China; 2.Tsinghua Univ, Shanxi Res Inst Clean Energy, Taiyuan 030032, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 5.Inner Mongolia Acad Sci & Technol, Green Hydrogen Technol Equipment & Applicat Res Ct, Hohhot 014010, 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.Rp_Au:Wang, Chao, Hao, Peixuan
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.