Elastic instability of bilayer graphene using atomistic finite element

Chandra, Y.; Chowdhury, Rajib; Adhikari, Sondipon; Scarpa, Fabrizio

doi:10.1016/j.physe.2011.06.020

Cited by 24 publications

(17 citation statements)

References 28 publications

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“…As for buckling of bilayer graphene, Chandra et al [67] confirmed that the critical buckling load of bilayer graphene is 20 times higher than that of monolayer graphene by atomistic finite element approaches. The buckling response of bilayer graphene is not sensitive to the aspect ratio but its critical buckling load decreases with increasing side-length.…”

Section: Bilayer Graphenementioning

confidence: 99%

A Review of Current Development of Graphene Mechanics

et al. 2018

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Graphene, a two-dimensional carbon in honeycomb crystal with single-atom thickness, possesses extraordinary properties and fascinating applications. Graphene mechanics is very important, as it relates to the integrity and various nanomechanical behaviors including flexing, moving, rotating, vibrating, and even twisting of graphene. The relationship between the strain and stress plays an essential role in graphene mechanics. Strain can dramatically influence the electronic and optical properties, and could be utilized to engineering those properties. Furthermore, graphene with specific kinds of defects exhibit mechanical enhancements and thus the electronic enhancements. In this short review, we focus on the current development of graphene mechanics, including tension and compression, fracture, shearing, bending, friction, and dynamics properties of graphene from both experiments and numerical simulations. We also touch graphene derivatives, including graphane, graphone, graphyne, fluorographene, and graphene oxide, which carve some fancy mechanical properties out from graphene. Our review summarizes the current achievements of graphene mechanics, and then shows the future prospects.

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Section: Bilayer Graphenementioning

confidence: 99%

A Review of Current Development of Graphene Mechanics

et al. 2018

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“…Since the publication of the seminal works by Odegard et al [40,41], much has been done in the development of beam FE models for nanotubes and graphene. Regarding graphene, excellent models have been proposed by Scarpa et al [42], Georgantzinos et al [43], Chandra et al [44], Rouhi and Ansari [45], Theodosiou and Saravanos [46], and Zhang et al [47]. However, FE method has not yet been applied to study the mechanical behavior of graphyne, even if for its simple linear elastic behavior.…”

Section: Finite Element Modeling Of Graphynementioning

confidence: 99%

Finite Element Modelling and Mechanical Characterization of Graphyne

Couto

Silvestre

2016

Journal of Nanomaterials

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Graphyne is an allotrope of carbon with excellent mechanical, electrical, and optical properties. The scientific community has been increasingly interested in its characterization and computational simulation, using molecular dynamics (MD) simulations and density functional theory (DFT). The present work presents, for the first time (to the authors’ knowledge), a finite element (FE) model to evaluate the elastic properties of graphyne. After presenting a brief literature review on the latest developments of graphyne and its mechanical characterization through computational methods, the FE model of graphyne sheet is presented in detail and the calculation of its elastic properties described. The linear elastic properties (Young’s modulus, Poisson’s ratio, bulk modulus, and shear modulus) obtained from the proposed FE models are in general agreement with those previously obtained by other authors using more complex computational models (MD and DFT). The influence of van der Waals (vdW) interatomic forces on the linear elastic properties of planar graphyne is negligible and can be disregarded if small strain hypothesis is adopted. The FE models also show that graphyne exhibits marginal orthotropic behavior, that is, “quasi-isotropic” behavior, a fact that agrees with the conclusions reported by other researchers.

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“…The atomistic models deployed here are based on the FE methodologies developed by the authors to study graphene and its associated nano structures [2,3,[15][16][17][18]. In this research work the FE analysis tool OPTISTRUCT has been used to model the dynamic behaviour of nano hetero-structures.…”

Section: Atomistic Fe Models Of Nano Hetero-structures Using Femmentioning

confidence: 99%

“…For instance, graphene shows great buckling strength [2,3], hexogonal Boron Nitride (hBN) [4] possesses outstanding spin polarized states [5] and Molybdenum Disulphide (MoS 2 ) [6] offers ex-ceptional electrical transport properties [7]. If different 2D nanomaterials are combined into one single nano hetero-structure, all these properties can be harnessed.…”

Section: Introductionmentioning

confidence: 99%

Buckling of 2D nano hetero-structures with moire patterns

Chandra

Flores

Adhikari

2020

Computational Materials Science

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Moire pattern arises from the lattice mismatch between two different nanosheets. The discovery of the Moire pattern has resulted in breakthrough properties in 2D carbon-based nanostructures such as graphene. Here we investigate the impact of a Moire pattern on mechanical properties of bi-layer 2D nanosheets. In particular, buckling instability of 2D carbonbased nano hetero-structures is investigated using atomistic finite element approaches. Nano hetero-structures considered are graphene-hBN (hexagonal Boron Nitride) and graphene-MoS 2 (Molybdenum disulphide). Bilayer graphene has also been considered in the buckling analysis, by orienting the individual sheets at moire angle. Atomistic simulation methodology uses elastic beams to represent intra-sheet atomic bonds and elastic springs to represent inter-sheet atomic interactions. The influence of different boundary conditions and sheet length on the buckling of nano hetero-structures has been investigated. The bridged nano hetero-structures are found be displaying higher buckling strength as compared to cantilever sheets.

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Elastic instability of bilayer graphene using atomistic finite element

Cited by 24 publications

References 28 publications

A Review of Current Development of Graphene Mechanics

A Review of Current Development of Graphene Mechanics

Finite Element Modelling and Mechanical Characterization of Graphyne

Buckling of 2D nano hetero-structures with moire patterns

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