Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 71, Issue 14, Pages 1659-1664Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2011.07.017
Keywords
Polymer-matrix composites (PMCs); Carbon fibers; Laminate; Electrical properties; Electrical behavior
Categories
Funding
- US Air Force Office of Scientific Research [FA9550-09-1-0359]
- AFOSR
- US Air Force Academy
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Electrical and thermal behavior of the carbon fiber-reinforced epoxy composites subjected to relatively high (up to 75 A) steady electric currents is studied. A fully automated experimental setup for real time measurements of the electric current, resistance, voltage, and temperature in carbon fiber-reinforced epoxy matrix composites has been developed. A series of electrical characterization tests on IM7/977-3 unidirectional and symmetric cross-ply composite laminates have been performed and the effects of electric current magnitude and duration, electrical resistance, and associated thermal effects have been investigated. It is determined that electrical resistance exhibits time-dependent behavior. It is also found that application of an electric current leads to a significant temperature rise in the composites that is a result of the intense Joule heat produced in the electrically conductive carbon fibers as well as in the composite-electrode contact. (C) 2011 Elsevier Ltd. All rights reserved.
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