Torsional behavior of chiral single-walled carbon nanotubes is loading direction dependent

被引：64

作者：

Chang, Tienchong ^{[1
]}

机构：

[1] Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai 200072, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 20期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2739325

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The torsion of carbon nanotubes is studied by molecular dynamics simulations. The torsional behavior of a chiral single-walled carbon nanotube (SWCNT) is dependent on the loading directions due to its structural asymmetry. The critical buckling shear strain of a SWCNT in one direction may be 1.8 times higher than that in the opposite direction. This means that one can choose the most appropriate SWCNT for his special purpose in designing a torsional component (e.g., oscillators and springs) of nanomechanical devices using carbon nanotubes. Meanwhile, the finding indicates that a simple thin shell model is not suitable for predicting torsional behavior of small SWCNTs at large strains. (C) 2007 American Institute of Physics.

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