Nanomechanics of single and multiwalled carbon nanotubes
Nanomechanics of single and multiwalled carbon nanotubes
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DOI：
10.1103/physrevb.69.115429
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发表时间：
2004-03-01
影响因子：
3.7
通讯作者：
Meguid, SA
中科院分区：
文献类型：
--
作者：
Liew, KM;Wong, CH;Meguid, SA
本文研究了单壁和多壁碳纳米管在轴向压缩下的屈曲行为。Brenner的“第二代”经验势被用来描述单壁碳纳米管的多体短程原子间相互作用，而Lennard Jones模型的货车德瓦尔斯势被添加到多壁碳纳米管。单，二，三，和四壁纳米管被认为是在模拟中，以检查层数的多壁纳米管的结构特性的影响。结果表明，单壁纳米管存在一个最佳直径，在此直径处屈曲载荷最大。在最佳直径范围内，屈曲载荷随直径的增大而迅速增大。超过该直径的进一步增加导致屈曲载荷缓慢下降，直到达到稳定值。层上的屈曲载荷的多壁纳米管的影响也检查。
Buckling behavior of single-walled and multiwalled carbon nanotubes is studied under axial compression in this work. Brenner's "second generation" empirical potential is used to describe the many-body short-range interatomic interactions for single-walled carbon nanotubes, while the Lennard Jones model for the van der Waals potential is added for multiwalled carbon nanotubes. Single-, two-, three-, and four-walled nanotubes are considered in the simulations in order to examine the effects of the number of layers on the structural properties of the multiwalled nanotubes. Results indicate that there exists an optimum diameter for single-walled nanotubes at which the buckling load reaches its maximum value. The buckling load increases rapidly with the increase of the diameter up to the optimum diameter. A further increment beyond this diameter results in a slow decline in buckling load until a steady value is reached. The effects of layers on the buckling load of multiwalled nanotubes are also examined.