Point-strain measurement within laminated fiber composite materials

Y. Y. Yang; David N. Batchelder; N. E. Fisher; Fiona M. Underwood

doi:10.1117/12.182124

5 August 1994 Point-strain measurement within laminated fiber composite materials

Y. Y. Yang, David N. Batchelder, N. E. Fisher, Fiona M. Underwood

Proceedings Volume 2321, Second International Conference on Optoelectronic Science and Engineering '94; (1994) https://doi.org/10.1117/12.182124
Event: Optoelectronic Science and Engineering '94: International Conference, 1994, Beijing, China

Abstract

This paper reports the development of a `smart' strain monitor based upon the use of resonant Raman spectroscopy to monitor point strain, potentially in-flight, within laminated carbon fiber composite aircraft structures. The DCH-polydiacetylene fiber together with an optic fiber as the light guide are embedded in the carbon fiber composite laminate as the strain sensor. The DCH-polydiacetylene fibers are single crystal fibers, whose Raman spectra are resonantly enhanced when excited by the red laser light. The Raman frequencies of the DCH fiber are observed to shift linearly to lower frequency with applied uniaxial strain.

Citation Download Citation

Y. Y. Yang, David N. Batchelder, N. E. Fisher, and Fiona M. Underwood "Point-strain measurement within laminated fiber composite materials", Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); https://doi.org/10.1117/12.182124

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