ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this paper, the mechanical properties, such as the axial and radial Young’s moduli, shearmoduli, buckling loads and natural frequencies, of single-walled carbon nanotubes, are estimated by afinite element approach. Each carbon nanotube is simulated as a frame-like structure and the primarybonds between two nearest-neighboring atoms are treated as isotropic beam members with a uniformcircular cross-section. In the modeling work, the BEAM4 element in commercial code ANSYS isselected to simulate the carbon bonds and the atoms are nodes. As to the input parameters of theBEAM4 element, they are determined via the concept of energy equivalence between moleculardynamics and structural mechanics, and represented in terms of the force constants of the carbonbonds found in molecular mechanics. Based on this modeling concept, finite element models of botharmchair and zigzag types of carbon nanotubes with different sizes are established and the mechanicalproperties of these tubes are then effectively predicted. Most of the computed results which can becompared with existing results show good agreement. Moreover, the effects of tube diameter, lengthetc., on the mechanical properties are also investigated
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.937.pdf
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