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On the Mechanical Properties of Chiral Carbon Nanotubes | ||
| Journal of Ultrafine Grained and Nanostructured Materials | ||
| مقاله 1، دوره 46، شماره 1، اسفند 2013، صفحه 1-9 اصل مقاله (784.74 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.7508/jufgnsm.2013.01.001 | ||
| نویسندگان | ||
| Mahnaz Zakeri* ؛ Mahdi Shayanmehr | ||
| Aerospace Engineering Department, K. N. Toosi University of Technology, Tehran, 16569-83911, Iran. Tel.: +98-21-73064217; fax: +98-21-77791045 | ||
| چکیده | ||
| 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. | ||
| کلیدواژه‌ها | ||
| Carbon Nanotube؛ Chirality؛ Tensile Rigidity؛ Bending Rigidity؛ Torsional Rigidity | ||
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