Multi-Scale Modeling of a Graphite-Epoxy-Nanotube SystemA multi-scale method is utilized to determine some of the constitutive properties of a three component graphite-epoxy-nanotube system. This system is of interest because carbon nanotubes have been proposed as stiffening and toughening agents in the interlaminar regions of carbon fiber/epoxy laminates. The multi-scale method uses molecular dynamics simulation and equivalent-continuum modeling to compute three of the elastic constants of the graphite-epoxy-nanotube system: C11, C22, and C33. The 1-direction is along the nanotube axis, and the graphene sheets lie in the 1-2 plane. It was found that the C11 is only 4% larger than the C22. The nanotube therefore does have a small, but positive effect on the constitutive properties in the interlaminar region.
Document ID
20050238474
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Frankland, S. J. V. (NASA Langley Research Center Hampton, VA, United States)
Riddick, J. C. (NASA Langley Research Center Hampton, VA, United States)
Gates, T. S. (NASA Langley Research Center Hampton, VA, United States)