Buckling Behavior of Substrate Supported Graphene Sheets

Materials. 2016;9(1):32 DOI 10.3390/ma9010032

 

Journal Homepage

Journal Title: Materials

ISSN: 1996-1944 (Print)

Publisher: MDPI AG

LCC Subject Category: Technology: Electrical engineering. Electronics. Nuclear engineering | Technology: Engineering (General). Civil engineering (General) | Science: Natural history (General): Microscopy | Science: Physics: Descriptive and experimental mechanics

Country of publisher: Switzerland

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS


Kuijian Yang (Institute of Solid Mechanics, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China)

Yuli Chen (Institute of Solid Mechanics, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China)

Fei Pan (Institute of Solid Mechanics, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China)

Shengtao Wang (Institute of Solid Mechanics, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China)

Yong Ma (Institute of Solid Mechanics, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China)

Qijun Liu (Department of Aerospace Engineering, University of Illinois, Champaign, IL 61801, USA)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 11 weeks

 

Abstract | Full Text

The buckling of graphene sheets on substrates can significantly degrade their performance in materials and devices. Therefore, a systematic investigation on the buckling behavior of monolayer graphene sheet/substrate systems is carried out in this paper by both molecular mechanics simulations and theoretical analysis. From 70 simulation cases of simple-supported graphene sheets with different sizes under uniaxial compression, two different buckling modes are investigated and revealed to be dominated by the graphene size. Especially, for graphene sheets with length larger than 3 nm and width larger than 1.1 nm, the buckling mode depends only on the length/width ratio. Besides, it is revealed that the existence of graphene substrate can increase the critical buckling stress and strain to 4.39 N/m and 1.58%, respectively, which are about 10 times those for free-standing graphene sheets. Moreover, for graphene sheets with common size (longer than 20 nm), both theoretical and simulation results show that the critical buckling stress and strain are dominated only by the adhesive interactions with substrate and independent of the graphene size. Results in this work provide valuable insight and guidelines for the design and application of graphene-derived materials and nano-electromechanical systems.