Buckling of single-walled carbon nanotubes upon bending: Molecular dynamics simulations and finite element method

✍ Scribed by Cao, Guoxin; Chen, Xi

• Book ID: 120626438
• Publisher: The American Physical Society
• Year: 2006
• Tongue: English
• Weight: 574 KB
• Volume: 73
• Category: Article
• ISSN: 1098-0121
• DOI: 10.1103/PhysRevB.73.155435

✦ Synopsis

The bending buckling behaviors of single-walled carbon nanotubes ͑SWCNTs͒ are systematically investigated by using both molecular dynamics ͑MD͒ simulation and finite element method ͑FEM͒, to analyze the relationships between critical bending buckling curvature, critical buckling strain and nanotube geometry parameters ͑e.g., tube diameter, length and chirality͒. The postbuckling shape of SWCNT and the effect of loading boundary conditions are also discussed. The comparison between MD and FEM simulations shows that the continuum shell model provides some useful insights into the bending buckling mechanisms, yet it cannot quantitatively reproduce the bending buckling behavior of SWCNTs, since the continuum model does not account for the geometrical imperfections in the atomic system that are critical to the onset of buckling. Improvements of continuum models are suggested based on the findings.