Review of optical fiber sensors for deformation measurement

Di, Haiting; Xin, Ying; Jian, Jinquan

doi:10.1016/j.ijleo.2018.04.131

Cited by 52 publications

(14 citation statements)

References 37 publications

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“…Fiber optics show great promise for monitoring the internal behavior of composites without impacting global material properties, provided that the optical fibers are in the tow direction. [9][10][11][12][13] Embedding optical fibers transverse to the tow direction can result in distortion of the surrounding plies, develop resin rich regions, and reduce mechanical properties by up to 10%. 13 However, other studies have shown that embedded optical fibers do not significantly impact properties such as mode II fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

Influence of cure parameters in polymer matrix composites using embedded optical fibers

Drake

Sullivan

Spowart

et al. 2020

Journal of Composite Materials

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The influence of cure processing parameters was investigated using strain distributions from embedded optical fibers. The determination of optimized cure parameters is often needed to achieve material properties which meet aerospace industry design requirements. Optical fibers were embedded near the midplane of thin (5 mm; [0/90/90/0]3s) composite laminates to monitor the internal strain during cure for two different cure cycles (manufacturer-recommended and an alternative two-step cure). Each laminate was fabricated using a vacuum-assisted resin transfer molding process. The internal strain with respect to the spatial position and time were monitored. During cure, greater variations in the strain near the vicinity of the laminate edges were observed. However, a two-step cure cycle revealed that the variation of strain near the laminate edges is reduced. The results demonstrate the capability of high-spatial resolution optical fibers to measure the in-situ cure and residual strain during the processing of composite structures.

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Section: Introductionmentioning

confidence: 99%

Influence of cure parameters in polymer matrix composites using embedded optical fibers

Drake

Sullivan

Spowart

et al. 2020

Journal of Composite Materials

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“…Over the last few years, optical fibre sensors (OFSs) have emerged as an alternative to their electronic equivalents in the process of testing material limitations for engineering structures 7 , 8 . Fibre-based sensors can be used to measure strain, temperature, pressure, bending and other quantities 9 , 10 . Such sensors are normally interrogated by coupling the light from a laser (often a single-frequency fibre laser) or from a superluminescent source.…”

Section: Introductionmentioning

confidence: 99%

High-performance vector bending and orientation distinguishing curvature sensor based on asymmetric coupled multi-core fibre

Arrizabalaga

Beresna

et al. 2020

Sci Rep

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fibre optic technology is rapidly evolving, driven mainly by telecommunication and sensing applications. excellent reliability of the manufacturing processes and low cost have drawn ever increasing attention to fibre-based sensors, e.g. for studying mechanical response/limitations of aerospace composite structures. Here, a vector bending and orientation distinguishing curvature sensor, based on asymmetric coupled multi-core fibre, is proposed and experimentally demonstrated. By optimising the mode coupling effect of a seven core multi-core fibre, we have achieved a sensitivity of − 1.4 nm/° as a vector bending sensor and − 17.5 nm/m −1 as a curvature sensor. these are the highest sensitivities reported so far, to the best of our knowledge. In addition, our sensor offers several advantages such as repeatability of fabrication, wide operating range and small size and weight which benefit its sensing applications. Mechanical structures are becoming more and more complex with the introduction of intricate geometries and composite materials 1. Fibre reinforced polymers are composites used in almost every type of advanced engineering structures, with their usage ranging from aircraft, helicopters and spacecraft through to boats, ships and civil infrastructure such as bridges and buildings. They are made with reinforcement fibres among the several types of composites 2,3 that are embedded in a polymer resin (mostly epoxy). Composite materials represent a growing piece of the aerospace material pie. They reduce weight and increase fuel efficiency while being easy to operate, design, shape, and repair. Thus, the study of the mechanical behaviour of these structures has enormous significance. In order to obtain the required level of performance for flight structures, detailed knowledge of material limitations, structural stability and strength aspects is required. Key sources of information on the mechanical performance are sensors based on electronic technology 4-6. Some of the benefits of this type of sensor include accuracy, a wide variety of sizes and shapes, and a simple operating principle. However, they also have several critical shortages. Their performance is affected by humidity, temperature and hysteresis, repeatability and accuracy fall with prolonged use, and also they can be damaged by statics or current overloads. Another constraint is that they cannot work in the presence of electromagnetic fields. Over the last few years, optical fibre sensors (OFSs) have emerged as an alternative to their electronic equivalents in the process of testing material limitations for engineering structures 7,8. Fibre-based sensors can be used to measure strain, temperature, pressure, bending and other quantities 9,10. Such sensors are normally interrogated by coupling the light from a laser (often a single-frequency fibre laser) or from a superluminescent source. The

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“…These differences can also be related to the amount of resin and disposition of the fibers. Other factors that may contribute to the difference in the measured strains may be associated with micro-bending effects [15] and residual strain [6]. As mentioned previously, all gauges were tared to a zero value prior to testing.…”

Section: Resultsmentioning

confidence: 99%

Distributed Strain Sensing from Different Optical Fiber Configurations

2018

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Strain distributions were obtained from optical fibers arranged in three different configurations on transversely-loaded cantilevered beams. Traditional strain measurement sensors, such as strain gauges, are limited to measuring strain at discrete points on a structural member. However, distributed optical fibers can measure high spatial (<1 mm spacing) strain or temperature distributions. In this study, optical fibers in spiral, grid, and rosette configurations were bonded to aluminum cantilevered beams subjected to tip loads. Strain distributions from optical fiber sensors were measured using a swept wavelength coherent interferometric technique. The optical fiber strain measurements show good agreement with strain gauge measurements. The attributes of each sensor configuration are discussed.

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Review of optical fiber sensors for deformation measurement

Cited by 52 publications

References 37 publications

Influence of cure parameters in polymer matrix composites using embedded optical fibers

Influence of cure parameters in polymer matrix composites using embedded optical fibers

High-performance vector bending and orientation distinguishing curvature sensor based on asymmetric coupled multi-core fibre

Distributed Strain Sensing from Different Optical Fiber Configurations

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