Multiplexed fibre optic sensors for monitoring resin infusion, flow and cure in composite material processing

Edmon Chehura*, Renata Jarzebinska, Elisabete F R Da Costa, Alexandros A. Skordos, Stephen W. James, Ivana K. Partridge, Ralph P. Tatam

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

9 Citations (Scopus)

Abstract

The infusion, flow and cure of RTM6 resin in a carbon fibre reinforced composite preform have been monitored using a variety of multiplexed fibre optic sensors. Optical fibre Fresnel sensors and tilted fibre Bragg grating (TFBG) sensors were configured to monitor resin infusion/flow in-plane of the component. The results obtained from the different sensors were in good agreement with visual observations. The degree of cure was monitored by Fresnel sensors via a measurement of the refractive index of the resin which was converted to degree of cure using a calibration determined from Differential Scanning Calorimetry. Fibre Bragg grating sensors fabricated in highly linearly birefringent fibre were used to monitor the development of transverse strain during the cure process, revealing through-thickness material shrinkage of about 712 με and residual strain of 223 με. An alternative approach to infusion monitoring, based on an array of multiplexed tapered optical fibre sensors interrogated using optical frequency domain reflectometry, was also investigated in a separate carbon fibre preform that was infused with RTM6 resin.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8693
DOIs
Publication statusPublished - 5 Jun 2013
EventSmart Sensor Phenomena, Technology, Networks, and Systems Integration 2013 - San Diego, CA, United Kingdom
Duration: 10 Mar 201314 Mar 2013

Conference

ConferenceSmart Sensor Phenomena, Technology, Networks, and Systems Integration 2013
CountryUnited Kingdom
CitySan Diego, CA
Period10/03/1314/03/13

Keywords

  • Cure
  • FBG
  • Fibre Bragg grating
  • Fresnel sensor
  • Infusion
  • Resin flow
  • Tapered sensor
  • TFBG

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