Localized strain measurements using an integration method to process intensity reflection spectra from a chirped FBG

A. Nand, D. J. Kitcher, S. A. Wade, R. Jones, G. W. Baxter, S. F. Collins

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

5 Citations (Scopus)

Abstract

A chirped fiber Bragg grating was used to measure the non-uniform strain profile of a notched aluminum specimen used to simulate a cracked structure. The specimen was subjected to tensile tests that produced regions of non-uniform strain near the notches. Analysis of power reflectance spectra from the grating, through the use of an integration method, enabled the strain profile near the notches to be determined. Unlike other intragrating sensing methods, this method did not require a disturbance hypothesis to be postulated. The strain profile results from this intragrating sensor were in reasonable agreement with predictions from modeling conducted using the finite element method.

Original languageEnglish
Title of host publicationEWOFS 2007 Proceedings
Subtitle of host publicationThird European Workshop on Optical Fibre Sensors
DOIs
Publication statusPublished - 4 Dec 2007
EventEWOFS 2007: Third European Workshop on Optical Fibre Sensors - Napoli, Italy
Duration: 4 Jul 20076 Jul 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6619
ISSN (Print)0277-786X

Conference

ConferenceEWOFS 2007: Third European Workshop on Optical Fibre Sensors
CountryItaly
CityNapoli
Period4/07/076/07/07

Keywords

  • Chirped fiber Bragg grating
  • Intragrating sensing
  • Strain measurement

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