Chirality independence in critical buckling forces of super carbon nanotubes
Chirality independence in critical buckling forces of super carbon nanotubes
复制标题
超级碳纳米管临界屈曲力的手性独立性
DOI：
10.1016/j.ssc.2008.07.025
复制
发表时间：
2008-10-01
影响因子：
2.1
通讯作者：
Fan, Qinshan
中科院分区：
文献类型：
--
作者：
Li, Ying;Qiu, XinMing;Fan, Qinshan
用分子结构力学方法研究了超级碳纳米管在压缩和弯曲作用下的弹性屈曲。在受压状态下，ST的弹性屈曲模式类似于悬臂柱。但随着ST长度的增加，ST的弯曲屈曲模式会由壳壁屈曲转变为梁屈曲。因此，经典的欧拉公式可以很好地预测ST的临界压缩力和ST的临界弯曲力。本文给出了一个关于ST临界弯曲力的唯象公式，该公式能很好地预测ST的临界弯曲屈曲，并能桥接弯曲屈曲模式的转变。发现了两种类型的手性无关现象：第一，ST内部的单元碳纳米管所承载的临界压缩力与ST的手性无关;第二，ST的临界弯曲力与ST的手性无关。(C)2008爱思唯尔有限公司保留所有权利。
The elastic buckling of super carbon nanotubes (STs) under compression and bending were studied by the molecular structure mechanics method. Under compression, the elastic buckling mode of the ST is similar to that of a cantilever column. However, the bending buckling mode of ST could transform from shell wall buckling to beam buckling as the length of ST increases. Therefore, the classical Euler formula could give good prediction both to the critical compression force for ST and to the critical bending force for very long STs. A phenomenological formula for the critical bending force of ST was given in this work, which could well predict the critical bending buckling of STs and bridge over the transformation of the bending buckling mode. Two types of chirality independent phenomena were found: first, the critical compression force carried by the unit carbon nanotube inside STs is independent of the chirality of STs; second, the critical bending force of ST's is independent of the chirality of STs. (C) 2008 Elsevier Ltd. All rights reserved.