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Carbon Fiber Reinforced Concrete as an Intrinsically Smart Concrete for Damage Assessment During Dynamic Loading

Published online by Cambridge University Press:  16 February 2011

Pu-Woei Chen  and
D.D.L. Chung
Pu-Woei Chen
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

Concrete containing short carbon fibers (0.2-0.5 vol.%) was found to be an intrinsically smart concrete that can sense elastic and inelastic deformation, and fracture. The signal provided is the change in electrical resistance, which is reversible for elastic deformation and irreversible for inelastic deformation and fracture. The presence of electrically conducting short fibers is necessary for the concrete to sense elastic or inelastic deformation, but the sensing of fracture does not require fibers. The fibers serve to bridge the cracks and provide a conduction path. The resistance increase is due to conducting fiber pull-out in the elastic regime, conducting fiber breakage in the inelastic regime, and crack propagation at fracture.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994 , 317
Copyright
Copyright © Materials Research Society 1995

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References

1.Chen, Pu-Woei and Chung, D.D.L., Smart Mater. Struct. 2, 22–30 (1993).Google Scholar
2.Chen, Pu-Woei and Chung, D.D.L., Composites 24, 33–52 (1993)Google Scholar