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Early Fatigue Damage In Carbon Fiber Composites Observed By Electrical Resistance Measurement

Published online by Cambridge University Press:  10 February 2011

Shoukai Wang ,
Xiaoping Shui ,
Xuli Fu  and
D. D. L. Chung
Shoukai Wang
Affiliation:
Composite Materials Research Laboratory, State University of New York at Buffalo Buffalo, NY 14260–4400
Xiaoping Shui
Affiliation:
Composite Materials Research Laboratory, State University of New York at Buffalo Buffalo, NY 14260–4400
Xuli Fu
Affiliation:
Composite Materials Research Laboratory, State University of New York at Buffalo Buffalo, NY 14260–4400
D. D. L. Chung
Affiliation:
Composite Materials Research Laboratory, State University of New York at Buffalo Buffalo, NY 14260–4400
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Abstract

Early fatigue damage during the first tenth (or less) of the fatigue life was observed in carbon fiber composites by DC electrical resistance measurement. The damage was most severe in the first loading cycle and the incremental damage in each subsequent cycle diminished cycle by cycle. For the continuous carbon fiber carbon-matrix composite, the resistance increased irreversibly during early fatigue due to matrix damage and possibly fiber fracture as well. For the short carbon fiber polymer-matrix and cement-matrix composites, the resistance decreased irreversibly during early fatigue due to matrix damage near the junction of adjacent fibers and the resulting increase in the chance that adjacent fibers touched one another.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 503: Symposium JJ – Nondestructive Characterization of Materials in Aging Systems , 1997 , 75
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

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