Optical Fiber Sensor Compatibility and Integration with Composite Materials

Davidson, R. D.; Roberts, S.

doi:10.1016/b0-08-042993-9/00155-8

Cited by 5 publications

(7 citation statements)

References 21 publications

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“…These materials with their high specific strength and stiffness are gradually replacing their metal counterparts due to reduced weight, improved wear and corrosion resistance, increased fatigue life, and the ability of the material and component to be formed at the same time. The wide ranges of structural composites are based on polymeric matrices with glass or carbon reinforcement [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Optical Fiber Embedded in Epoxy Glass Unidirectional Fiber Composite System

et al. 2013

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We aimed to embed silica optical fibers in composites (epoxy vinyl ester matrix reinforced with E-glass unidirectional fibers in mass fraction of 60%) in order to further monitor the robustness of civil engineering structures (such as bridges). A simple system was implemented using two different silica optical fibers (F1—double coating of 172 μm diameter and F2—single coating of 101.8 μm diameter respectively). The optical fibers were dynamically tensile tested and Weibull plots were traced. Interfacial adhesion stress was determined using pull-out test and stress values were correlated to fracture mechanisms based on SEM observations. In the case of the optical fiber (OF) (F1)/resin system and OF (F1)/composite system, poor adhesion was reported that may be correlated to interface fracture at silica core level. Relevant applicable results were determined for OF (F2)/composite system.

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Section: Introductionmentioning

confidence: 99%

Optical Fiber Embedded in Epoxy Glass Unidirectional Fiber Composite System

et al. 2013

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“…6 However, NDT tools cannot be used for real-time inspection, they are time-consuming and also require external equipment resulting in additional financial and human resources. 6,7…”

Section: Introductionmentioning

confidence: 99%

“…6 However, NDT tools cannot be used for real-time inspection, they are time-consuming and also require external equipment resulting in additional financial and human resources. 6,7 There is a growing demand for reliable sensing technologies which can replace traditional NDT tools to monitor the internal characteristics of a composite structure's lifecycle from manufacturing to decommissioning. There are a variety of sensors that are suitable for structural sensing applications, such as foil strain gauge (FSG), optical fibre sensor (OFS), micro-electro-mechanical systems (MEMS), and electromagnetic sensors.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and optical performance evaluations of embedded polyimide and PEEK coated distributed optical sensors in glass fibre reinforced composites with vinyl ester resin systems

Nagulapally

Shamsuddoha

Herath³

et al. 2023

Journal of Composite Materials

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Embedded optical fibre sensors (OFSs) offer the potential to monitor the internal strains at various stages during the manufacturing and service life of fibre-reinforced polymer (FRP) composite structures. Various aspects associated with the embedment of OFSs, such as integration, material compatibility, and sensing performance of the embedded sensor needs to be investigated to develop reliable OFSs based internal sensing platform for composite structures. In this study, Polyimide (PI) and Polyether ether ketone (PEEK) coated optical fibres (OF) were embedded into glass fibre-reinforced polymer (GFRP) composites to evaluate four important aspects associated with the embedment of OFs, which include; i). Structural integrity of the OFs against chemical reactions from vinyl ester resin and its additives through immersion testing, ii). Methods of integrating the OFs into layered glass fibres for the vacuum resin infusion manufacturing process, iii). Sensing performance of the embedded OFs during manufacturing and structural testing (tensile and compressive), and iv). Internal structural integrity of the embedded OFs and the host composite structure using X-Ray micro-computerised tomography technique (μ-CT). The results from the immersion testing and manufacturing process monitoring showed that both PEEK and PI coated OFs can resist the chemical and mechanical stresses caused by resin polymerisation during curing process. The subsequent mechanical testing showed a similar sensing performance by the PI and PEEK coated OFs. Under tensile loads, the OFs monitored the tensile strain distribution up to 7,000 με and compressive strain distribution up to −1,200 με under flexural loading without compromising their optical performance. Finally, the μ-CT scanning results had shown a minimal structural deterioration of the embedded OFs and host composite structure. The outcomes from this detailed experimental investigation on the embedment of OFS in GFRP structures provided useful information towards the integration and performance of optical sensors in composite structures.

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“…In numerous structural applications, optical fibre embedded composites based on polymeric matrices with glass or carbon reinforcements [1,2] are recommended for structural health monitoring. Monitoring in real time the structural integrity using optical fibre sensors is linked with the strength transfer at the interface between the composite structure and the optical fibre [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…This experimental investigation is aimed to compare the chemical reliability of silica optical fibres to a series of aggressive reagents in gaseous and liquid phase, such as fluorinated vapours, acetylene, ammonia (gaseous reagents) and dimethyl-sulfoxide (liquid reagent). Secondly, the study is aimed to 1 Corresponding author irina.severin@upb.ro 2 assess the effectiveness of the hermetical coating in-line deposition in terms of mechanical and chemical reliability.…”

Section: Introductionmentioning

confidence: 99%

Interfacial phenomena in optical fibre embedded systems

Severin

Caramihai

Abdi

et al. 2019

Composite Structures

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The reliability and the expected lifetime of optical fibres used in different structural applications, including composites are closely related to the chemical environment action on the silica cladding. To ensure the long-term mechanical strength of the optical fibres, a polymer coating was applied onto the fibre surface during fabrication. The aging mechanism is assumed to enlarge or to extend the "Griffith flaws" which are spread at the fibre surface. Systematic experiments have been carried out to assess different reagents' effect on the fibre mechanical strength, such as fluorinated vapors, acetylene, ammonia and organic compounds. Different types of fibres, including hermetically coated ones, have been aged and subjected to mechanical tests under dynamic conditions. The Weibull statistical study allows to evaluate the flaws' dispersion along the fibre surface. SEM observations evidenced several failure mechanisms.

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Optical Fiber Sensor Compatibility and Integration with Composite Materials

Cited by 5 publications

References 21 publications

Optical Fiber Embedded in Epoxy Glass Unidirectional Fiber Composite System

Optical Fiber Embedded in Epoxy Glass Unidirectional Fiber Composite System

Mechanical and optical performance evaluations of embedded polyimide and PEEK coated distributed optical sensors in glass fibre reinforced composites with vinyl ester resin systems

Interfacial phenomena in optical fibre embedded systems

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