Temperature and strain effects discrimination inside composite materials with embedded weakly tilted fibre Bragg grating

Kinet, Damien; Garray, Didier; Mégret, Patrice; Caucheteur, Christophe

doi:10.1117/12.2025841

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…It is a practical method comprising the addition of a loose tube shield around the optical fiber at the edge of the composite materials specimen, Figure 3. The tube may be realized in polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE, well-known as Teflon) [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. The study of [43] investigates the influence of strain state distribution on the accuracy of embedded FBGs used as strain sensors with structural loading coaxial to the fiber optic direction.…”

Section: Fbgs Applicationmentioning

confidence: 99%

Strain State Detection in Composite Structures: Review and New Challenges

Arena

Viscardi

2020

J. Compos. Sci.

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Developing an advanced monitoring system for strain measurements on structural components represents a significant task, both in relation to testing of in-service parameters and early identification of structural problems. This paper aims to provide a state-of-the-art review on strain detection techniques in composite structures. The review represented a good opportunity for direct comparison of different novel strain measurement techniques. Fibers Bragg grating (FBG) was discussed as well as non-contact techniques together with semiconductor strain gauges (SGs), specifically infrared (IR) thermography and the digital image correlation (DIC) applied in order to detect strain and failure growth during the tests. The challenges of the research community are finally discussed by opening the current scenario to new objectives and industrial applications.

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Section: Fbgs Applicationmentioning

confidence: 99%

Strain State Detection in Composite Structures: Review and New Challenges

Arena

Viscardi

2020

J. Compos. Sci.

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“… Use of tilted FBGs that couple light both in the core and the cladding and therefore display numerous cladding mode resonances in their transmitted spectrum. Each cladding mode resonance behaves differently in response to strain [ 29 – 32 ]. …”

Section: Discrimination Between Temperature and Strain Effectsmentioning

confidence: 99%

Fiber Bragg Grating Sensors toward Structural Health Monitoring in Composite Materials: Challenges and Solutions

Kinet

Mégret

Goossen

et al. 2014

Sensors

437

237

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Nowadays, smart composite materials embed miniaturized sensors for structural health monitoring (SHM) in order to mitigate the risk of failure due to an overload or to unwanted inhomogeneity resulting from the fabrication process. Optical fiber sensors, and more particularly fiber Bragg grating (FBG) sensors, outperform traditional sensor technologies, as they are lightweight, small in size and offer convenient multiplexing capabilities with remote operation. They have thus been extensively associated to composite materials to study their behavior for further SHM purposes. This paper reviews the main challenges arising from the use of FBGs in composite materials. The focus will be made on issues related to temperature-strain discrimination, demodulation of the amplitude spectrum during and after the curing process as well as connection between the embedded optical fibers and the surroundings. The main strategies developed in each of these three topics will be summarized and compared, demonstrating the large progress that has been made in this field in the past few years.

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“…They have been already widely used as a viable replacement of strain gauges in both laboratory [7][8][9] and real use applications, in aeronautics [10,11], civil [12] and nautical [13] engineering fields showing a high technology readiness level [14]. Fibre Optics (FO) is also used as a temperature sensor [15][16][17], for strain/temperature compensation [18][19][20] and for curing monitoring of Fibre Reinforced Plastics [21,22]. FBG can also be used for measuring other magnitudes adapting the Bragg condition [23,24].…”

Section: Introductionmentioning

confidence: 99%