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Spatially resolved self-sensing of strain and damage in carbon fiber cement

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Abstract

Spatially resolved self-sensing of strain and damage has been shown in carbon fiber cement under flexure by three-point bending. This involves measurement of the one-dimensional distribution of the DC electrical resistance by the use of surface electrical contacts on the bottom (tension) and top (compression) surfaces. For a span of 290 mm, a spatial resolution of 5 mm has been attained. The bottom surface resistance, which increases reversibly with strain and increases irreversibly with damage, is a more effective indicator of strain and damage (in combination) than the top surface resistance, the oblique resistance or the through-thickness resistance for spatially resolved self-sensing. For sensing without spatial resolution, the oblique resistance is the most effective indicator. For sensing with distinction between strain and damage, the top surface resistance is the most effective indicator.

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Acknowledgement

This work was supported in part by U.S. National Science Foundation.

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Authors and Affiliations

  1. Composite Materials Research Laboratory, University at Buffalo State University at New York, Buffalo, NY, 14260-4400, USA

    Sihai Wen & D. D. L. Chung

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  1. Sihai Wen
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  2. D. D. L. Chung
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Correspondence to D. D. L. Chung.

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Wen, S., Chung, D.D.L. Spatially resolved self-sensing of strain and damage in carbon fiber cement. J Mater Sci 41, 4823–4831 (2006). https://doi.org/10.1007/s10853-006-0028-5

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  • DOI: https://doi.org/10.1007/s10853-006-0028-5

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