Title :
Axial buckling behavior of single-walled carbon nanotubes with finite element modeling
Author :
Chen, Lijie ; Zhao, Qi ; Zhang, Hongtao
Author_Institution :
Sch. of Phys. & Mech. & Electr. Eng., Xiamen Univ., Xiamen, China
Abstract :
Based on the three-dimensional finite element (FE) model, we perform the eigenvalue buckling analysis for armchair and zigzag single-walled carbon nanotubes (SWCNTs) under axial compression. The effects of nanotube length and diameter on the buckling modes and the critical buckling loads are systematically studied. The lengths of SWCNTs vary from 1.5 to 30 nm and the diameters vary from 0.3 to 4.5 nm. The buckling modes and the critical buckling loads of different SWCNTs are obtained. The simulation results show that the diameter and the length evidently affect the buckling mode and the critical buckling load of SWCNTs. The critical buckling load decreases to a relatively stable value with the length increasing and in general increases with the diameter increasing. With the increase of length-diameter ratio, the buckling modes of SWCNTs change from shell-like buckling characteristics to space trusses-like buckling characteristics, especially for SWCNTs with small diameters. Therefore, the modeling method based on beam theory in nature can well simulate the buckling behaviors.
Keywords :
buckling; carbon nanotubes; eigenvalues and eigenfunctions; finite element analysis; supports; FE model; axial buckling behavior; axial compression; beam theory; buckling modes; eigenvalue buckling analysis; finite element modeling; single-walled carbon nanotubes; space trusses-like buckling; buckling behavior; buckling mode; critical buckling loads; finite element method; single-walled carbon nanotubes;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems (NEMS), 2010 5th IEEE International Conference on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4244-6543-9
DOI :
10.1109/NEMS.2010.5592214