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International Journal of Polymer Science
Volume 2015, Article ID 715753, 8 pages
http://dx.doi.org/10.1155/2015/715753
Research Article

Stress Distribution of CF/EP Laminated Composites under Supercritical Conditions

School of Mechanical & Automotive Engineering, Hefei University of Technology, Hefei 230009, China

Received 6 October 2014; Accepted 19 January 2015

Academic Editor: Jose Ramon Leiza

Copyright © 2015 Haihong Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Enormous amounts of wastes have been produced due to extensive use of carbon fiber/epoxy resin (CF/EP) composites. The fact that the supercritical fluid can be used to recycle these composites efficiently has attracted widespread concerns. A three-dimensional model of CF/EP laminates considering the interfacial layers was established. The internal stress distribution of laminates was simulated based on a heat transfer model; and the change of shear stress with supercritical temperature and pressure was investigated. The results show that the shear stress concentration was located in the interfacial layers; the maximum shear stress can be expressed by a curve of convex parabola to the temperature; and the most serious damage occurred in interfacial layers when temperature approached the glass-transition temperature of resin.