Coarse-grained molecular dynamics simulations have been performed to investigate the tensile behavior of CNT films. It is found that CNT entanglements greatly degrade the tensile load-bearing capability of CNT films. The effect of twisting on the tensile behavior of CNT fibers spun from CNT films has also been investigated. Results indicate that twisting can make either positive or negative contributions to the mechanical properties of the film, depending on the microstructure. The structural and energy evolution of CNT films and fibers, as well as the stress distributions of CNTs which cannot be easily determined experimentally, have been illustrated. This study provides an effective means of revealing the structure/property relationships of CNT films/fibers, which are essential in designing high performance CNT fibers.
Mechanical Behavior and Structural Evolution of Carbon Nanotube Films and Fibers Under Tension: A Coarse-Grained Molecular Dynamics Study
and Center for Composite Materials,
University of Delaware,
Beijing University of Technology,
Korean Institute of Materials Science,
Manuscript received November 21, 2012; final manuscript received December 31, 2012; accepted manuscript posted February 14, 2013; published online July 18, 2013. Editor: Yonggang Huang.
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Lu, W., Liu, X., Li, Q., Byun, J., and Chou, T. (July 18, 2013). "Mechanical Behavior and Structural Evolution of Carbon Nanotube Films and Fibers Under Tension: A Coarse-Grained Molecular Dynamics Study." ASME. J. Appl. Mech. September 2013; 80(5): 051015. https://doi.org/10.1115/1.4023684
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