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首页> 外文期刊>Physica status solidi, B. Basic research >Shear modulus and Poisson's ratio of single-walled carbon nanotubes: Numerical evaluation
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Shear modulus and Poisson's ratio of single-walled carbon nanotubes: Numerical evaluation

机译：单壁碳纳米管的剪切模量和泊松比：数值评估

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摘要

The mechanical behaviour of non-chiral and chiral single-walled carbon nanotubes under torsional loading is studied. For this purpose, three-dimensional finite element modelling is used in order to evaluate the torsional rigidity and shear modulus. It is shown that the evolution of torsional rigidity as a function of nanotube diameter can be described by a unique function for non-chiral and chiral single-walled nanotubes. A comprehensive study to evaluate the Poisson's ratio of single-walled carbon nanotubes is also carried out. Two robust methodologies, one for evaluating the shear modulus from results of tensile, bending and torsion tests, and the other to assess Poisson's ratio from results of bending and torsion tests, are recommended.
机译：研究了非手性和手性单壁碳纳米管在扭转载荷下的力学行为。为此，使用三维有限元建模来评估扭转刚度和剪切模量。结果表明，抗扭刚度随纳米管直径的变化可以通过非手性和手性单壁纳米管的独特功能来描述。还进行了评估单壁碳纳米管的泊松比的综合研究。建议使用两种可靠的方法，一种用于从拉伸，弯曲和扭转测试的结果评估剪切模量，另一种用于从弯曲和扭转测试的结果评估泊松比的方法。

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