Identification and characterisation of delamination damage in composites utilising embedded optical strain gauges

P. R. Cook, A. Alavija, S. J. Wildy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)
3 Downloads (Pure)

Abstract

With increased use of fibre reinforced plastics throughout many industries, the use of embedded sensors is of key interest. Typically formed through layering glass or carbon fibres within a polymer matrix, smart structures capable of self-monitoring become a possibility with the aid of optical fibre strain gauges, specifically fibre Bragg gratings. As these sensors may be multiplexed to produce a distributed sensor array within a structure, this presents pathway towards undertaking non-destructive evaluation of structures persistently and in real time. This paper demonstrates the ability of optical strain gauges to detect delamination damage in beam specimens composed of unidirectional carbon fibre reinforced plastics. By embedding optical fibres with fibre Bragg gratings into beams at the point of fabrication, specimens are produced with distributed strain gauge arrays within the structure. Analytical models for non-destructive evaluation are proposed for detection and characterisation of delamination damage in statically and dynamically loaded beams. Through a series of tests, the proposed analytical models are tested and found to positively identify and locate damaged regions while providing an indicator of damage severity.

Original languageEnglish
Title of host publication9th Australasian Congress on Applied Mechanics (ACAM9)
EditorsB G Prusty, A M Paradowska
Place of PublicationSydney
PublisherEngineers Australia
Pages140-147
Number of pages8
ISBN (Print)9781925627022, 9781510859647
Publication statusPublished - 2017
Event9th Australasian Congress on Applied Mechanics - University of New South Wales, Sydney, Australia
Duration: 27 Nov 201729 Nov 2017
Conference number: 9th

Conference

Conference9th Australasian Congress on Applied Mechanics
Abbreviated titleACAM 9
Country/TerritoryAustralia
CitySydney
Period27/11/1729/11/17
OtherThe Congress aims to provide an international forum for researchers, industry practitioners, engineers and postgraduate scholars to promote, exchange and disseminate recent findings on contemporary and wide-ranging topics in Applied Mechanics.

Hear presentations from Scientific leaders from Australia and Internationally; learn practical applications through case from industry, and keep abreast of latest research and developments from Engineering students and experts.

Keywords

  • Delamination
  • Fibre Bragg gratings
  • Fibre reinforced plastic
  • Governing differential equation
  • Non-destructive evaluation
  • Savitzky-Golay filter

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