The excellent performance of carbon nanotubes (CNTs) allows them to be widely employed in various micro- and nano-electromechanical devices. However, different imperfections such as Stone–Wales (S-W) defects often arise in these structures during the preparation process. In this paper, special attention is paid to the effects of the number and location of defects as well as the diameter and chiral angle of CNTs on the static and dynamic buckling of CNTs with S-W defects. First, LAMMPS software is used to simulate the molecular dynamics (MDs) of CNTs with S-W defects, and their static buckling performances are discussed. Then based on the static buckling data, the dynamic buckling vibration performance of CNTs with S-W defects is analyzed in the context of the nonlocal elastic theory. Finally, the effective range of nonlocal parameters is established via the MD modeling. The results show that the existence of S-W defects will reduce the buckling performance and vibration characteristics of CNTs, and an increase in the number of defects will aggravate the influence of diameter and chiral angle on the buckling performance as well as the natural frequency and amplitude of the nanotube’s axial vibration.

中文翻译：

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具有SW缺陷的CNTS的静态和动态屈曲行为

碳纳米管 (CNT) 的优异性能使其能够广泛应用于各种微纳机电设备中。然而，在制备过程中，这些结构中经常会出现不同的缺陷，例如 Stone-Wales (SW) 缺陷。在本文中，特别关注缺陷的数量和位置以及CNT的直径和手性角对具有SW缺陷的CNT的静态和动态屈曲的影响。首先，利用LAMMPS软件模拟了具有SW缺陷的碳纳米管的分子动力学（MDs），并讨论了它们的静态屈曲性能。然后基于静态屈曲数据，在非局部弹性理论的背景下分析了具有SW缺陷的碳纳米管的动态屈曲振动性能。最后，非局部参数的有效范围是通过MD建模建立的。结果表明，SW缺陷的存在会降低碳纳米管的屈曲性能和振动特性，而缺陷数量的增加会加剧直径和手征角对屈曲性能以及固有频率和振幅的影响。纳米管的轴向振动。