On Computational Methods for Elastic Moduli of Single-Walled Carbon Nanotubes

摘要

Experimentally and computationally obtained elastic properties of multi-walled carbon nanotubes (MWCNT) and single-walled carbon nanotubes (SWCNT) are reviewed. The particular focus is on Young's moduli of SWCNT. A finite element method (FEM) is proposed for the determination of Young's modulus of SWCNT. The Poisson's ratio effect is included in this approach. Within the linear regime, the Young's moduli of SWCNT have been estimated to be constant. This is in contrast to those appeared in the literature in which a wide range of Young's moduli was reported. The procedure is simple and very economical to employ compared with those based on particle or molecular dynamics methods where huge computational resources are necessary.