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Interphase Behavior in Cyclic Fatigue of Monofilament Composites

Published online by Cambridge University Press:  21 February 2011

Linda S. Schadler ,
Juan C. Figueroa  and
Campbell Laird
Linda S. Schadler
Affiliation:
U. of Pennsylvania, Philadelphia, PA.
Juan C. Figueroa
Affiliation:
E.I. Du Pont de Nemours and Co., Wilmington, Delaware
Campbell Laird
Affiliation:
U. of Pennsylvania, Philadelphia, PA.
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Abstract

Macroscopic properties of fiber reinforced composites are dependent on the micromechanics of the filament-matrix interphase. We present here some preliminary results of our studies aimed at understanding the behavior of the interphase when the composite is subjected to cyclic tensile loading. We have used carbon/polycarbonate mono-filament composites as a model system for studying the effects of loading direction (axial and transverse), frequency, and amplitude. The interphase was varied by etching the filament surface. Damage was characterized by fiber matrix debonding, reduction in interphase stress transfer efficiency, and changes in the locus of failure as determined by SEM fractography.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 170: Symposium N – Interfaces in Composites , 1989 , 345
Copyright
Copyright © Materials Research Society 1990

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