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General elasticity ...
General elasticity theory for graphene membranes based on molecular dynamics
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- Samadikhah, Kaveh, 1982 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Atalaya, Juan, 1981 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Huldt, Caroline, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- Isacsson, Andreas, 1975 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kinaret, Jari, 1962 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa färre...
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(creator_code:org_t)
- ISBN 9781605608266
- 2007
- 2007
- Engelska.
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Ingår i: Materials Research Society Symposium Proceedings. - 0272-9172. - 9781605608266 ; 1057, s. 109-114
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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