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research article
Pullout forces and friction in multiwall carbon nanotubes
2004
Molecular dynamic calculations of pullout in multiwall carbon nanotubes (CNTs) demonstrate that inner walls with fractured ends have pullout forces similar to3-4 times larger than those for capped ends, due to deformation of the fractured end, quantitatively accounting for experiments. Under pressure, Amonton's law applies to an area of contact at the fractured end, with mu=0.13-0.33. Defects in the CNT walls affect the force, suggesting a mechanism for the observed stick-slip behavior and an increase of pullout force with decreasing embedded length. The results have implications for CNT composite strength and toughness.
Type
research article
Authors
Publication date
2004
Published in
Volume
69
Issue
23
Article Number
233408
Subjects
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
November 7, 2014
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