Vibration and instability of carbon nanotubes conveying fluid
Vibration and instability of carbon nanotubes conveying fluid
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DOI：
10.1016/j.compscitech.2004.12.002
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发表时间：
2005-07
影响因子：
9.1
通讯作者：
J. Yoon;C. Ru;A. Mioduchowski
中科院分区：
文献类型：
--
作者：
J. Yoon;C. Ru;A. Mioduchowski
碳纳米管可能会在纳米技术中找到重要的应用，如输送流体的纳米管。研究了内部运动流体对碳纳米管自由振动和流动诱导结构失稳的影响。给出了共振频率与流速关系的详细结果，并计算了碳纳米管出现结构不稳定的临界流速。结果表明，在较高的流速下，内部运动的流体会显著影响纳米碳管的共振频率，特别是对于悬浮的较长且最内半径较大的纳米碳管，并且在某些情况下，结构失稳的临界流速会落在有实际意义的范围内.另一方面，即使是柔性的周围弹性介质（例如聚合物基质）也可以显著降低内部运动流体对谐振频率的影响，并且在实际流速范围内抑制或消除结构不稳定性。
Carbon nanotubes may find significant application in nanotechnology as nanopipes conveying fluid. This paper studies the influence of internal moving fluid on free vibration and flow-induced structural instability of carbon nanotubes. Detailed results are demonstrated for the dependence of resonant frequencies on the flow velocity, and the critical flow velocity at which structural instability of carbon nanotubes emerges is calculated. The results indicate that internal moving fluid could substantially affect resonant frequencies especially for suspended longer carbon nanotubes of larger innermost radius at higher flow velocity, and the critical flow velocity for structural instability in some cases could fall within the range of practical significance. On the other hand, even a compliant surrounding elastic medium (such as polymer matrix) can significantly reduce the effect of internal moving fluid on resonant frequencies, and suppress or eliminate structural instability within the practical range of flow velocity.