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Indexed by:期刊论文

Date of Publication:2009-07-01

Journal:JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE

Included Journals:EI、SCIE、Scopus

Volume:6

Issue:7

Page Number:1617-1621

ISSN No.:1546-1955

Key Words:Chiral Nanotubes; Cauchy-Born Rule; Torsion Respone

Abstract:The Young's moduli, shear moduli and the radial strain induced torsion response of chiral single walled carbon nanotubes are investigated systematically using a nanoscale continuum theory based on higher order Cauchy-Born rule. The computational results indicate that the Young's moduli and shear moduli of chiral SWCNTs increase with increasing tube radius and converge to the corresponding limit values of graphite sheet. The chirality-dependence of Young's moduli and shear moduli is not significant. The size-dependent strain energy per atom relative to a graphite sheet is insensitive to tube chirality, which is consistent with the existing atomistic calculations. The radial strain induced torsion is limited to chiral single-walled carbon nanotubes and is maximum for nanotube with chiral angle of pi/12. Chirality and size dependence of the radial strain induced torsion is also analyzed in detail, respectively.