Tensile yielding of multiwall carbon nanotubes

Wei, Chenyu; Cho, Kyeongjae; Srivastava, Deepak
April 2003
Applied Physics Letters;4/14/2003, Vol. 82 Issue 15, p2512
Academic Journal
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 l%/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.


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