Abstract
Using molecular dynamics simulations, we study axial compressive behavior of single-walled carbon nanotubes (SWCNTs) with a wide range of aspect ratios (length to diameter ratio). It is shown that the difference in aspect ratio leads to distinct buckling modes in SWCNTs. Small-aspect-ratio SWCNTs primarily exhibit shell buckling; they switch to a column buckling mode with increasing aspect ratio. Further compression of the already column buckled large-aspect-ratio SWCNTs results in a shell buckling. This shell buckling mode is distinct from that of small-aspect-ratio SWCNTs in that it originates from the column buckling induced bending deformation. The transition strain from column buckling to shell buckling of large-aspect-ratio SWCNTs is predicted using an analytical expression. The underlying mechanism is discussed by analyzing the variation of C-C bond lengths and angles.
Original language | English |
---|---|
Pages (from-to) | 084323-1-084323-5 |
Number of pages | 5 |
Journal | Journal of Applied Physics |
Volume | 109 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- bending
- buckling (mechanics)
- carbon
- molecular dynamics
- nanotubes