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General elasticity ...
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Samadikhah, Kaveh,1982Chalmers tekniska högskola,Chalmers University of Technology
(author)
General elasticity theory for graphene membranes based on molecular dynamics
- Article/chapterEnglish2007
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LIBRIS-ID:oai:research.chalmers.se:fee6c999-a8d4-4df9-a121-41a9ccc5e3a7
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ISBN:9781605608266
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https://research.chalmers.se/publication/74807URI
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Language:English
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Summary in:English
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Subject category:kon swepub-publicationtype
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We have studied the mechanical properties of suspended graphene membranes using molecular dynamics (MD) and generalized continuum elasticity theory (GE) in order to develop and assess a continuum description for graphene. The MD simulations are based on a valence force field model which is used to determine the deformation and the elastic energy of the membrane (EMD) as a function of external forces. For the continuum description, we use the expression Econt = Estretching + Ebending for the elastic energy functional. The elastic parameters (tensile rigidity and Poisson ratio) entering Econt are determined by requiring that E cont = EMD for a set of deformations. Comparisons with the MD results show excellent agreement. We find that the elastic energy of a supported graphene sheets is typically dominated by the nonlinear stretching terms whereas a linear description is valid only for very small deflections. This implies that in some applications, i.e. NEMS, a linear description is of limited applicability.
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Atalaya, Juan,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)atalaya
(author)
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Huldt, Caroline,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)chuldt
(author)
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Isacsson, Andreas,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)isac
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Kinaret, Jari,1962Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kinaret
(author)
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Chalmers tekniska högskola
(creator_code:org_t)
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In:Materials Research Society Symposium Proceedings1057, s. 109-1140272-91729781605608266
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