Share Email Print
cover

Proceedings Paper

Fracture toughness characterization of nanoreinforced carbon-fiber composite materials for damage mitigation
Author(s): Jennifer A. VanderVennet; Terrisa Duenas; Yuris Dzenis; Chad T. Peterson; Charles E. Bakis; Daniel Carter; J. Keith Roberts
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Continuous polyacrylonitrile (PAN) nanofibers fabricated via the electrospinning process and commercially available silica nanoparticles were investigated and compared for their impact mitigating effects when incorporated into composite materials. The nanofibers were introduced at ply interfaces using two different approaches while the nanoparticles were mixed into the matrix material. Behavior was experimentally characterized by determining the fracture toughness of flat carbon-fiber composite coupons using the double cantilever beam (DCB) test according to ASTM D5528. The nanofibers were introduced to the composite coupons by directly electrospinning the fibers onto the ply surfaces or transferring the fibers from an interim substrate, or "nanomat", while the nanosilica particles were mixed into the resin system during vacuum bagging hand layup. Testing facilitated the calculation of Mode I strain energy release rates. Preliminary results show that when compared to a baseline coupon without nanoreinforcement, there is a 54.5%, 43.1%, and 26.9% reduction in Gavg for the nanomat, nanosilica, and directly deposited nanomaterial coupons, respectively. Directly deposited nanofibers outperformed the nanosilica reinforcement by 16.2% and the nanomat approach by 27.6%. Basic materials (carbon-fiber ply material and matrix system) and incomplete composite consolidation were cited as contributors to poor test coupon quality and detrimental to Mode I performance.

Paper Details

Date Published: 28 April 2011
PDF: 10 pages
Proc. SPIE 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011, 797823 (28 April 2011); doi: 10.1117/12.880194
Show Author Affiliations
Jennifer A. VanderVennet, NextGen Aeronautics, Inc. (United States)
Terrisa Duenas, NextGen Aeronautics, Inc. (United States)
Yuris Dzenis, Precision Nanotechnologies LLC (United States)
Univ. of Nebraska-Lincoln (United States)
Chad T. Peterson, Precision Nanotechnologies LLC (United States)
Univ. of Nebraska-Lincoln (United States)
Charles E. Bakis, The Pennsylvania State Univ. (United States)
Daniel Carter, U.S. Army Research, Development and Engineering Command (United States)
J. Keith Roberts, U.S. Army Research, Development and Engineering Command (United States)


Published in SPIE Proceedings Vol. 7978:
Behavior and Mechanics of Multifunctional Materials and Composites 2011
Zoubeida Ounaies; Stefan S. Seelecke, Editor(s)

© SPIE. Terms of Use
Back to Top