Real-time through-thickness and in-plane strain measurement in Carbon Fibre Reinforced Polymer composites using planar optical Bragg grating

Christopher Holmes, Mike Godfrey, Daniel John Bull, Janice Dulieu-Barton

Research output: Contribution to journalArticle (Academic Journal)peer-review

52 Downloads (Pure)

Abstract

A new strain sensor is proposed which can measure both through-thickness and in-plane strains within a laminated fibre-reinforced composite material. The planar sensor uses novel embedded planar optic sensors and is demonstrated on a carbon fibre composite test coupon. The planar optical sensor was fabricated via flame hydrolysis deposition and was physically machined to reduce the substrate thickness to <50 µm. Strain components are decoupled through monitoring the transverse electric and transverse magnetic effective refractive indices of two orthogonal planar waveguides. The work investigates if the embedded planar sensors have any mechanical knockdown effects on the composite structure and demonstrates their effectiveness at decoupling three orthogonal strain components.
Original languageEnglish
Article number106111
Number of pages9
JournalOptics and Lasers in Engineering
Volume133
Early online date28 Apr 2020
DOIs
Publication statusPublished - 1 Oct 2020

Fingerprint Dive into the research topics of 'Real-time through-thickness and in-plane strain measurement in Carbon Fibre Reinforced Polymer composites using planar optical Bragg grating'. Together they form a unique fingerprint.

Cite this