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Dynamic Buckling of Double-Walled Carbon Nanotubes under Step Axial Load
  • 时间：0
  • 分类：O221.5[理学—运筹学与控制论;理学—数学] TB383[一般工业技术—材料科学与工程]
  • 作者机构：[1]LTCS and Department of Mechanics and Aerospace Engineering,College of Engineering, Peking University, Beijing 100871, China, [2]Higher Education Press, Beijing 100029, China
  • 相关基金：Project supported by the National Natural Science Foundation of China （Nos. 10572002 and 10732010）.
  • 相关项目：极端条件下非晶态材料及结构的力学行为
关键词： 双壁碳纳米管, 动力屈曲, 轴向载荷, 固定边界条件, 屈曲临界载荷, 屈曲载荷, 近似方法, 轴向负荷, carbon nanotube, dynamic buckling, buckling load, buckling mode
中文摘要：

一个近似方法为学习在步下面的双 walled 碳 nanotubes (DWNT ) 的动态弄弯在这篇论文被介绍轴的负担。分析基于连续统力学模型，它考虑在外部、内部的 nanotubes 之间的货车 der Waals 相互作用。一个弄弯的条件被导出，从哪个批评弄弯负担和联系弄弯的模式能被决定。作为例子，数字结果在固定边界条件下面为 DWNT 被得出。当把一个内胎插入到围单人赛的时，由于货车 der Waals 力量的效果， DWNT 的批评弄弯负担被提高，这被显示出。纸显示为动态弄弯的 DWNT 的批评弄弯负担为静态的弄弯比那高。半径的效果也被检验。另外，一些结果与以前的相比。

英文摘要：

An approximate method is presented in this paper for studying the dynamic buckling of double-walled carbon nanotubes （DWNTs） under step axial load. The analysis is based on the continuum mechanics model, which takes into account the van der Waals interaction between the outer and inner nanotubes. A buckling condition is derived, from which the critical buckling load and associated buckling mode can be determined. As examples, numerical results are worked out for DWNTs under fixed boundary conditions. It is shown that, due to the effect of van der Waals forces, the critical buckling load of a DWNT is enhanced when inserting an inner tube into a single-walled one. The paper indicates that the critical buckling load of DWNTs for dynamic buckling is higher than that for static buckling. The effect of the radii is also examined. In addition, some of the results are compared with the previous ones.

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