Nonlinear elasticity of monolayer graphene

Abstract

By combining continuum elasticity theory and tight-binding atomistic simulations, we work out the constitutive nonlinear stress-strain relation for graphene stretching elasticity and we calculate all the corresponding nonlinear elastic moduli. Present results represent a robust picture on elastic behavior of one-atom thick carbon sheets and provide the proper interpretation of recent experiments. In particular, we discuss the physical meaning of the effective nonlinear elastic modulus there introduced and we predict its value in good agreement with available data. Finally, a hyperelastic softening behavior is observed and discussed, so determining the failure properties of graphene.

4 pages

References in corpus (2)

• Ab-initio structural, elastic, and vibrational properties of carbon nanotubes
• Ab initio calculations of third-order elastic constants and related properties for selected semiconductors

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