B-staged carbon nanotube/epoxy films for the improvement of interlaminar fracture toughness Conference Paper uri icon

abstract

  • The Mode I interlaminar fracture behavior of four-harness satin orthogonal woven carbon fiber/epoxy composite laminates incorporating carbon nanotube/epoxy composite films has been investigated. The objective was to compare results for laminates with films containing carbon nanotubes (CNTs) in the as-received state and after oxidation. Laminates incorporating neat epoxy films were also evaluated. Double cantilever beam (DCB) specimens were used for the measurement of GIc, the critical strain energy release rate (fracture toughness), and the generation of resistance curves. Post-fracture microscopic inspection of the fracture surfaces was performed to determine crack paths and crack morphology. It was found that the fracture toughness of laminates incorporating the films (with and without CNTs) was reduced. This effect was attributed to the thicker mid-plane interlaminar epoxy layer created by the films.

author list (cited authors)

  • Klein, P. J., Warren, G. L., Sager, R. J., Sue, H. J., & Lagoudas, D. C.

publication date

  • December 2007