CARBON-FIBER-REINFORCED CONCRETE AS AN INTRINSICALLY SMART CONCRETE FOR DAMAGE ASSESSMENT DURING DYNAMIC LOADING | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

6861590

Reference Type

Journal Article

Title

CARBON-FIBER-REINFORCED CONCRETE AS AN INTRINSICALLY SMART CONCRETE FOR DAMAGE ASSESSMENT DURING DYNAMIC LOADING

Author(s)

Chen, PW; Chung, DDL; ,

Year

1995

Is Peer Reviewed?

Yes

Journal

Journal of the American Ceramic Society
ISSN: 0002-7820

Publisher

WILEY-BLACKWELL

Location

MALDEN

Page Numbers

816-818

Web of Science Id

WOS:A1995QM99600048

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, as well as 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 pullout in the elastic regime, conducting fiber breakage in the inelastic regime, and crack propagation at fracture.