碳纳米管增强铝面内力学性能的分子动力学研究

Molecular Dynamics Simulation of In-plane Mechanical Properties of Carbon Nanotubes Reinforced Aluminum

摘要: 通过分子动力学方法，对不同内径扶手椅型碳纳米管（CNTs）增强的铝基体进行面内压缩，探究碳纳米管对铝基体弹性模量以及抗压强度的影响。试验中碳纳米管相对质量分数介于3.9%~23.7%之间。研究结果表明：随着碳纳米管质量分数增加，增强效果越好。弹性模量方面碳纳米管增强效果介于52%~276%之间，抗压强度方面碳纳米管增强效果介于38%~119%之间。此外，单壁碳纳米管（SWCNTs）的增强效率高于双壁碳纳米管（DWCNTs），因此，建议使用SWCNTs作为增强基。

Abstract: The influences of carbon nanotubes(CNTs)on the elastic moduli and compressive strength of aluminum (Al) matrix were investigated using the classical molecular dynamics (MD) method. The relative mass fractions of CNTs are between 3.9% and 23.7% in our study. The results show that the reinforced effect is increased with the increase of the mass fraction of CNTs. The reinforcement of carbon nanotubes ranges from 52% to 276% on the elastic moduli, and from 38% to 119% on the compressive strength. In addition, The efficiency of enhancement of single-wall carbon nanotubes(SWCNTs) is higher than that of double-wall carbon nanotubes (DWCNTs). Therefore, it is better to use SWCNTs as reinforced material than DWCNTs.