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Fiber Breakage In Polymer-Matrix Composites During Static And Fatigue Loading, Observed By Electrical Resistance Measurement

Published online by Cambridge University Press:  10 February 2011

Xiaojun Wang
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

By measuring the electrical resistance of a continuous unidirectional carbon fiber epoxy-matrix composite along the fiber direction during loading in this direction, fiber breakage was progressively monitored in real time. Fiber breakage occurred in spurts involving 1000 fibers or more. It started at about half of the failure strain during static tensile loading and at about half of the fatigue life during tensiontension fatigue testing. Immediately before static failure, 35% of the fibers were broken. Immediately before fatigue failure, 18% of the fibers were broken. The fiber breakage was accompanied by decrease in modulus.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

1. Muto, Norio, Yanagida, Hiroaki, Miyayama, Masaru, Nakatsuji, Teruyuki, Sugita, Minoru and Ohtsuka, Yasushi, J. Ceramic Soc. Japan 100 (4), 585 (1992).CrossRefGoogle Scholar
2. Wang, X. and Chung, D.D.L., Smart Mater. Struct. 5, 796 (1996).CrossRefGoogle Scholar
3. Wang, X. and Chung, D.D.L., Carbon 35, 706 (1997).CrossRefGoogle Scholar

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Fiber Breakage In Polymer-Matrix Composites During Static And Fatigue Loading, Observed By Electrical Resistance Measurement
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