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Mechanical loss in a glass-epoxy composite

Published online by Cambridge University Press:  31 January 2011

Manfred Weller  and
Hassel Ledbetter
Manfred Weller
Affiliation:
Max-Planck-Institut für Metallforschung, Institut für Werkstoffwissenschaft, Stuttgart, Federal Republic of Germany
Hassel Ledbetter
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80303
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Abstract

Using a computer-controlled inverted torsion pendulum at frequencies near 1 Hz, we determined the mechanical losses in a uniaxially fiber-reinforced composite. The composite comprised glass fibers in an epoxy-resin matrix. We studied three fiber contents: 0,41, and 49 vol.%. Three mechanical-loss peaks appeared: above 300 K, near 200 K, and near 130 K. They correspond closely to α, β, and γ peaks found previously in many polymers. We failed to see a mechanical-loss peak for either the glass or the glass-resin interface. Between 300 and 4 K, the torsion modulus increased in the resin by a factor of 3.30 and in the 0.49 glass-epoxy by a factor of 2.37.

Information

Type
Materials Communications
Information
Journal of Materials Research , Volume 5 , Issue 5 , May 1990 , pp. 913 - 915
Copyright
Copyright © Materials Research Society 1990

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References

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