Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 15, Pages 2512-2514Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1567041
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The tensile yielding of multiwall carbon nanotubes (MWCNTs) has been studied using molecular-dynamics simulations and a transition state theory based model. We find a strong dependence of the yielding on the strain rate. A critical strain rate has been predicted above/below which yielding strain of a MWCNT is larger/smaller than that of the corresponding single-wall carbon nanotubes (CNTs). At an experimentally feasible strain rate of 1%/h and T=300 K, the yield strain of a MWCNT is estimated to be about 3%-4% higher than that of an equivalent single-wall CNT. This is in good agreement with recent experimental observations. (C) 2003 American Institute of Physics.
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