Modeling of anisotropic elastic properties of multi-walled zigzag carbon nanotubes
| Autor: | Igor Sevostianov, Ahmad Almagableh, Mohammad A. Omari |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering General Engineering Modulus Flexural rigidity 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology Finite element method law.invention symbols.namesake 020303 mechanical engineering & transports 0203 mechanical engineering Zigzag Mechanics of Materials law symbols General Materials Science Composite material van der Waals force 0210 nano-technology Anisotropy Beam (structure) |
| Zdroj: | International Journal of Engineering Science. 144:103127 |
| ISSN: | 0020-7225 |
| Popis: | Non-linear three dimensional finite element model of double wall carbon nanotube has been developed to evaluate its anisotropic elastic properties. Carbon nanotube was modeled as a frame-like structure and its elastic properties have been considered in the sense of the average over volume (effective) response on the axial and radial loadings. The principal bonds between two adjacent atoms were simulated using equivalent pseudo-rectangular beam elements which exhibit different flexural rigidity along the two principal centroid axes of the cross-section. The simulation of the interlayer van der Waals force with intrinsic nonlinearity and complicated applying region has been performed. Resulting Young's moduli of double walled carbon nanotube of diameter of 0.7–2 nm was found to vary from 0.2 to 0.5 TPa in axial direction and from 1.4 to 43.3 GPa in radial direction. The radial Young's modulus exponentially decays with the tube diameter. |
| Databáze: | OpenAIRE |
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