On the Mechanical Properties of Chiral Carbon Nanotubes
| Autor: | Mahnaz Zakeri, Mahdi Shayanmehr |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Journal of Ultrafine Grained and Nanostructured Materials, Vol 46, Iss 1, Pp 1-9 (2013) |
| Druh dokumentu: | article |
| ISSN: | 2423-6845 2423-6837 |
| DOI: | 10.7508/jufgnsm.2013.01.001 |
| Popis: | Carbon nanotubes (CNTs) are specific structures with valuable characteristics. In general, the structure of each nanotube is defined by a unique chiral vector. In this paper, different structures of short single-walled CNTs are simulated and their mechanical properties are determined using finite element method. For this aim, a simple algorithm is presented which is able to model the geometry of single-walled CNTs with any desired structure based on nano-scale continuum mechanics approach. By changing the chiral angle from 0 to 30 degree for constant length to radius ratio, the effect of nanotube chirality on its mechanical properties is evaluated. It is observed that the tensile modulus of CNTs changes between 0.93-1.02 TPa for different structures, and it can be higher for chiral structures than zigzag and armchair ones. Also, for different chiral angles, the bending modulus changes between 0.76-0.82 TPa, while the torsional modulus varies in the range of 0.283-0.301TPa. |
| Databáze: | Directory of Open Access Journals |
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