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Journal of Nanomaterials
Volume 2012, Article ID 847307, 6 pages
Research Article

Transitional Failure of Carbon Nanotube Systems under a Combination of Tension and Torsion

Department of Guided Weapon Engineering, Daeduk College, Daejeon 305-715, Republic of Korea

Received 13 June 2012; Accepted 26 August 2012

Academic Editor: Raymond L. D. Whitby

Copyright © 2012 Byeong-Woo Jeong. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Transitional failure envelopes of single- and double-walled carbon nanotubes under combined tension-torsion are predicted using classical molecular dynamics simulations. The observations reveal that while the tensile failure load decreases with combined torsion, the torsional buckling moment increases with combined tension. As a result, the failure envelopes under combined tension-torsion are definitely different from those under pure tension or torsion. In such combined loading, there is a multitude of failure modes (tensile failure and torsional buckling), and the failure consequently exhibits the feature of transitional failure envelopes. In addition, the safe region of double-walled carbon nanotubes is significantly larger than that of single-walled carbon nanotubes due to the differences in the onset of torsional buckling.