Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 69, Issue 3-4, Pages 335-342Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2008.10.019
Keywords
Carbon nanotube; Hybrid composites; Nanocomposites; Modeling; Resin transfer molding (RTM)
Categories
Funding
- High-Performance Materials Institute at Florida State University
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Carbon fiber-reinforced epoxy composites modified with carbon nanotubes (CNTs) were fabricated and characterized. High-energy sonication was used to disperse CNTs in the resin, followed by infiltration of fiber preform with the resin/CNT mixture. The effects of sonication time on the mechanical properties of multiscale composites, which contain reinforcements at varying scales, were studied. A low CNT loading of 0.3 wt% in resin had little influence on tensile properties, while it improved the flexural modulus, strength, and percent strain to break by 11.6%, 18.0%, and 11.4%, respectively, as compared to the control carbon fiber/epoxy composite. While sonication is an effective method to disperse CNTs in a resin, duration, intensity, and temperature need to be controlled to prevent damages imposed on CNTs and premature resin curing. A combination of Halpin-Tsai equations and woven fiber micromechanics was used in hierarchy to predict the mechanical properties of multiscale composites, and the discrepancies between the predicted and experimental values are explained. (C) 2008 Elsevier Ltd. All rights reserved.
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