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Predicting mechanical properties of carbon nanosprings based on molecular mechanics simulation

机译：基于分子力学模拟的碳纳米弹簧力学性能预测

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摘要

A carbon nanospring (CNS) is formed by coiling a single-walled carbon nanotube around a cylindrical surface with a uniform pitch length and a uniform spring rise angle. Using the displacement-controlled tension method, the mechanical properties of small-radius and large-radius CNSs are investigated based on a molecular mechanics (MM) simulation. The tension behaviour of a small-radius CNS with more turns is similar to that of a mechanical spring. The spring stiffness of a three-turn CNS is calculated to be 0.36 N/ m with a maximum of 38% elongation for its elastic deformation. Although a large-radius CNS with more turns cannot be uniformly stretched along its axial direction, it has excellent flexibility without structural damage even when the CNS is stretched to a carbon nanotube (CNT). It is found that the spring stiffness of a large-radius CNS with one turn and two turns are both nonlinear. For a one-turn CNS, the stiffness first decreases and then increases with the tension displacement and less influenced by the chiral type.
机译：碳纳米弹簧（CNS）是通过将单壁碳纳米管以均匀的节距长度和均匀的弹簧上升角缠绕在圆柱表面上而形成的。使用位移控制张力方法，基于分子力学（MM）仿真研究了小半径和大半径CNS的力学性能。具有更多匝数的小半径CNS的拉伸行为类似于机械弹簧的拉伸行为。计算出三匝CNS的弹簧刚度为0.36 N / m，最大弹性伸长率为38％。尽管具有更大匝数的大半径CNS不能沿其轴向均匀地拉伸，但是即使将CNS拉伸到碳纳米管（CNT）时，它也具有出色的柔韧性而不会造成结构损坏。发现大半径CNS的一圈和两圈的弹簧刚度都是非线性的。对于一转CNS，刚度首先随着张力位移而减小，然后增大，并且受手性类型的影响较小。

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  • 来源
    《Composite Structures》 |2014年第8期|41-50|共10页
  • 作者

    Cong Feng; K.M. Liew; Pengfei He; Aihui Wu;

  • 作者单位

    College of Materials Science and Engineering, Key Laboratory for Advanced Civil Engineering Materials (Ministry of Education), Tongji University, Shanghai 201804, China;

    Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region,City University of Hong Kong Shenzhen Research Institute Building, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China;

    School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;

    School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Carbon nanospring; Single-walled carbon nanotube; Molecular mechanics;

    机译：碳纳米弹簧;单壁碳纳米管;分子力学;

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