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A mechanical equivalence for Poisson's ratio and thickness of C–C bonds in single wall carbon nanotubes

Fabrizio Scarpa1,3 and Sondipon Adhikari2

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A formulation for the equivalent mechanical properties (Young's modulus, shear modulus and Poisson's ratio) of the C–C bond of CNTs under tensile and bending small deformations is derived. The C–C bonds behave like structural elements with negligible lateral deformation when stretched. The results from the model have been applied to structural mechanics truss assemblies representing single wall nanotube and nanoropes, providing good comparison with existing numerical and experimental results available.


PACS

62.25.-g Mechanical properties of nanoscale systems

62.20.D- Elasticity

62.20.F- Deformation and plasticity

81.40.Jj Elasticity and anelasticity, stress-strain relations

61.46.Fg Nanotubes

81.40.Lm Deformation, plasticity, and creep

Subjects

Condensed matter: structural, mechanical & thermal

Nanoscale science and low-D systems

Dates

Issue 8 (21 April 2008)

Received 8 January 2008, in final form 22 February 2008

Published 20 March 2008



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