Note: Strain sensitivity comparison between fiber Bragg gratings inscribed on 125 and 80 micron cladding diameter fibers, case study on the solidification monitoring of a photo-curable resin

Maccioni, Enrico; Morganti, M.; Brandi, F.

doi:10.1063/1.4908573

Cited by 3 publications

(2 citation statements)

References 18 publications

(17 reference statements)

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“…He found that the resin experienced a non-uniform compressive strain due to the photo-polymer solidification. Maccioni et al [14] investigated the effect of the cladding diameter on the strain measurement. They reported that the longitudinal force F is proportional to the outer surface of the optical fiber, i.e., F 9 cladding diameter.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Adhesive and Bonding Length on the Strain Transfer of Optical Fiber Sensors

Her

Huang

2016

Applied Sciences

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Optical fiber sensors have been extensively adapted as structural health monitoring devices. Due to the existence of the adhesive layer, a portion of the strain is absorbed by the adhesive. As a result, the structural strain sensed by the optical fiber is underestimated and required to be corrected. An analytical solution is presented through which it is possible to establish the relationship between the strains in the host structure and the surface bonded optical fiber sensor. Experimental measurements based on the Mach-Zehnder interferometric technique were performed to validate the theoretical prediction and reveal the differential strains between the optical fiber strain sensor and test specimen. Parametric studies show that the percentage of the strain in the test specimen actually transferred to the optical fiber is dependent on the bonding length of the optical fiber and the adhesive. The strain transfer is increasing from 56% to 82% as the bonding length increases from 5 cm to 12 cm with the epoxy adhesive. The general trend of the strain transfer obtained from both experimental tests and theoretical predictions shows that the longer the bonding length and the stiffer the adhesive, the more strain is transferred to the optical fiber.

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Section: Introductionmentioning

confidence: 99%

The Effects of Adhesive and Bonding Length on the Strain Transfer of Optical Fiber Sensors

Her

Huang

2016

Applied Sciences

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“…Strain transfer functions were initially developed for FO measurements in the late 1990s and early 2000s [ 13 , 14 , 15 , 16 , 17 ] where the strain transfer relationship was deemed to be a function of the properties of the adhesive [ 18 , 19 ] and the geometry of the glued area, i.e., the adhesive thickness, width and bonding length [ 19 , 20 , 21 , 22 ]. More recent studies have investigated the detailed nature and geometry of the bonded environment and across a range of glues and epoxy resin types [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

The Application of High-Resolution, Embedded Fibre Optic (FO) Sensing for Large-Diameter Composite Steel/Plastic Pipeline Performance under Dynamic Transport Loads

Cassidy,

O’Regan,

Luo

et al. 2024

Sensors

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Distributed optical fibre sensing (DOFS)-based strain measurement systems are now routinely deployed across infrastructure health monitoring applications. However, there are still practical performance and measurement issues associated with the fibre’s attachment method, particularly with thermoplastic pipeline materials (e.g., high-density polyethylene, HDPE) and adhesive affixment methods. In this paper, we introduce a new optical fibre installation method that utilises a hot-weld encapsulation approach that fully embeds the fibre onto the pipeline’s plastic surface. We describe the development, application and benefits of the new embedment approach (as compared to adhesive methods) and illustrate its practical performance via a full-scale, real-world, dynamic loading trial undertaken on a 1.8 m diameter, 6.4 m long stormwater pipeline structure constructed from composite spiral-wound, steel-reinforced, HDPE pipe. The optical frequency domain reflectometry (OFDR)-based strain results show how the new method improves strain transference and dynamic measurement performance and how the data can be easily interpreted, in a practical context, without the need for complex strain transfer functions. Through the different performance tests, based on UK rail-road network transport loading conditions, we also show how centimetre- to metre-scale strain variations can be clearly resolved at the frequencies and levels consistent with transport- and construction-based, buried infrastructure loading scenarios.

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Wideband Fiber Bragg Grating Accelerometer Suitable for Health Monitoring of Electrical Machines

et al. 2020

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Note: Strain sensitivity comparison between fiber Bragg gratings inscribed on 125 and 80 micron cladding diameter fibers, case study on the solidification monitoring of a photo-curable resin

Cited by 3 publications

References 18 publications

The Effects of Adhesive and Bonding Length on the Strain Transfer of Optical Fiber Sensors

The Effects of Adhesive and Bonding Length on the Strain Transfer of Optical Fiber Sensors

The Application of High-Resolution, Embedded Fibre Optic (FO) Sensing for Large-Diameter Composite Steel/Plastic Pipeline Performance under Dynamic Transport Loads

Wideband Fiber Bragg Grating Accelerometer Suitable for Health Monitoring of Electrical Machines

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