The design of composite rotors for high-energy density pulsed power supplies demands accurate characterization of both the mechanical and electrical properties of fiber-reinforced epoxy. The mechanical properties of S-2 glass-epoxy, IM6 graphite-epoxy, and hybrid graphite-glass epoxy composites were measured in tension and torsion tests, providing strength and stiffness parameters for rotor dynamics modeling. Variable frequency electrical resistivity tests were conducted to allow estimation of eddy current losses arising in carbon-reinforced materials. Volume fraction measurements using electron microscopy and analysis by digestion allow for normalization of the test results with respect to composite fiber content. The experimental results were used to evaluate the micromechanical rule of mixtures and Halpin-Tsai correlations.

Issue Section:
Research Papers
Topics:
Carbon, Electrical properties, Fiber reinforced composites, Glass, Epoxy adhesives, Epoxy resins, Composite materials, Fibers, Graphite, Density, Design, Eddy current losses, Electrical resistivity, Electron microscopy, Mechanical properties, Modeling, Rotordynamics, Rotors, Stiffness, Tension, Torsion
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Copyright © 1991
 by The American Society of Mechanical Engineers
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