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Dual-Fibre Bragg Grating Sensor for Simultaneous Temperature and Strain Sensing of Composite Materials Manufacturing

Abstract : The Optical Fibre Sensors (OFS)-based monitoring of a composite part during its manufacturing process is presented. The sensor is made of a dual grating, i.e. a standard FBG and a Long Period Grating (LPG) photo-written at the same location, which provides accurate temperature and strain measurements, as well as a good spatial resolution. By using the differences of sensitivities of each grating, this dual-sensor is able to discriminate and to determine accurately temperature and strain. The dual-sensor has been tested during the curing of a pure epoxy resin, and a composite part obtained by Liquid Resin Infusion (LRI) process. Such dual-grating sensor is also very promising for SHM of composite parts.
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https://hal.inria.fr/hal-01021254
Contributor : Anne Jaigu <>
Submitted on : Wednesday, July 9, 2014 - 10:28:17 AM
Last modification on : Monday, January 13, 2020 - 5:46:04 PM
Long-term archiving on: : Thursday, October 9, 2014 - 11:31:44 AM

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  • HAL Id : hal-01021254, version 1

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Emmanuel Marin, Youcef Ouerdane. Dual-Fibre Bragg Grating Sensor for Simultaneous Temperature and Strain Sensing of Composite Materials Manufacturing. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01021254⟩

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