Fatigue failure mechanisms of single-walled carbon nanotube ropes embedded in epoxy

Y. Ren, Yong Qing Fu, K. Liao, F. Li, Hui-Ming Cheng

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

In this work, fatigue failure mechanisms of single-walled carbon nanotube(SWCNT) bundles embedded in epoxy matrix under repeated tensile load were studied. Observed damage and failure modes include: (1) splitting of SWCNT bundles, (2) kink formation and subsequent failure in SWCNTs, and (3) fracture of SWCNT bundles. Patterns of crack propagation under tension in SWCNTs were studied by molecular mechanics simulations, where defect-free SWCNTs and SWCNTs with two different modes of Stone–Wales defects were studied. It is demonstrated by the results of molecular mechanics simulation that the observed fracture surfaces of SWCNT can be reproduced reasonably well, suggesting possible fatigue failure mechanisms of SWCNT in the composite.
Original languageEnglish
Pages (from-to)2811
JournalApplied Physics Letters
Volume84
Issue number15
DOIs
Publication statusPublished - 2004

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