Chirality dependent elastic properties of single-walled boron nitride nanotubes under uniaxial and torsional loading

Journal Article · Fri Feb 14 04:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4864781· OSTI ID:22278081

Ghosh, Debraj ^[1]

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1. Department of Civil Engineering, Indian Institute of Science, Bangalore 560012 (India)

The elastic behavior of single-walled boron nitride nanotubes is studied under axial and torsional loading. Molecular dynamics simulation is carried out with a tersoff potential for modeling the interatomic interactions. Different chiral configurations with similar diameter are considered to study the effect of chirality on the elastic and shear moduli. Furthermore, the effects of tube length on elastic modulus are also studied by considering different aspects ratios. It is observed that both elastic and shear moduli depend upon the chirality of a nanotube. For aspect ratios less than 15, the elastic modulus reduces monotonically with an increase in the chiral angle. For chiral nanotubes, the torsional response shows a dependence on the direction of loading. The difference between the shear moduli against and along the chiral twist directions is maximum for chiral angle of 15°, and zero for zigzag (0°) and armchair (30°) configurations.

• OSTI ID: 22278081
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ASPECT RATIO
BORON NITRIDES
CHIRALITY
ELASTICITY
LOADING
MOLECULAR DYNAMICS METHOD
NANOTUBES
POTENTIALS
SHEAR PROPERTIES
YOUNG MODULUS