Fibre Bragg grating strain sensor and study of its packaging material for use in critical analysis on steel structure

Gangopadhyay, Tarun Kumar; Majumder, Mrinmoy; Chakraborty, Akshoy Kumar; Dikshit, Asok K.; Bhattacharya, D. K.

doi:10.1016/j.sna.2008.12.017

Cited by 36 publications

(22 citation statements)

References 14 publications

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“…In recent years, many experiments and researches have been carried out on laminated composites to obtain optimal mechanical properties [10][11][12][13][14][15][16][17][18]. Composite properties are highest in the direction of the fibers orientation.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Bragg and Polarimetric Optical Fiber Sensors for Stress Monitoring in Composite Materials

et al. 2009

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Composite structures are made of two or more components with significantly different physical or chemical properties and they remain separate and distinct in a macroscopic level within the finished structure. This feature allows for introducing optical fiber sensors into the composite material. These sensors can demonstrate stress distribution inside tested material influenced by external tensions. Two types of the optical fiber sensors are used as the 3D structure. One of them is based on application of fiber Bragg grating inside the core of the fiber. Longitudinal stress changes parameters of the Bragg grating and simultaneously, spectral characteristics of the light transmitted through the fiber. The second one is based on application of highly birefringent fibers which, under external stress, introduce polarization changes of the output light.

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Section: Introductionmentioning

confidence: 99%

Comparison of Bragg and Polarimetric Optical Fiber Sensors for Stress Monitoring in Composite Materials

et al. 2009

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“…With the modulation, if a broadband light beam is transmitted through the FBG, part of the incoming light with certain wavelength will be reflected showing a dip in the reflected light spectrum, known as Bragg wavelength (λ B ). The Bragg wavelength needs to meet the Bragg condition with effective refractive index (n eff ) and grating pitch (Λ), as [42]:…”

Section: Principle Of Fbg Sensormentioning

confidence: 99%

Pitted Corrosion Detection of Thermal Sprayed Metallic Coatings Using Fiber Bragg Grating Sensors

et al. 2017

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Metallic coatings using thermal spraying techniques are widely applied to structural steels to protect infrastructure against corrosion and improve durability of the associated structures for longer service life. The thermal sprayed metallic coatings consisting of various metals, although have higher corrosion resistance, will still corrode in a long run and may also subject to corrosion induced damages such as cracks. Corrosion and the induced damages on the metallic coatings will reduce the effectiveness of the coatings for protection of the structures. Timely repair on these damaged metallic coatings will significantly improve the reliability of protected structures again deterioration. In this paper, an inline detection system for corrosion and crack detection was developed using fiber Bragg (FBG) grating sensors. Experimental results from laboratory accelerated corrosion tests showed that the developed sensing system can quantitatively detect corrosion rate of the coating, corrosion propagations, and cracks initialized in the metallic coating in real time. The developed system can be used for real-time corrosion detection of coated metal structures in field.

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“…Besides, FBGs have high sensitivity to track strain variation in real time that closely reflects the structure deformation. (6,7) Therefore, FBGs are employed to measure the strain of PMC samples at different strain rates.…”

Section: Introductionmentioning

confidence: 99%

Fiber Cross-Section Shape Effect on Rate-Dependent Behavior of Polymer Matrix Composites with Fiber Bragg Grating Sensors

Zhu

He²,

Ye³

et al. 2013

Sensors and Materials

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A strain measurement system with fiber Bragg grating (FBG) sensors is developed to monitor the quasistatic/dynamic strain in a glass/epoxy for the experimental analysis of the rate-dependent behavior of polymer matrix composites (PMCs). The rate-dependent inelastic constitutive relationship of epoxy is built using an internal state variable viscoplasticity model with experimental responses. The micromechanical investigation of fiber shape effect on the rate-dependent behavior of glass/epoxy for various off-axis angles is performed at 10 -5 and 1/s. The results indicate that a higher strain rate causes a greater flow stress in PMCs. The fiber shape evidently affects the inelastic deformation at large off-axis angle with the biggest stiffness provided by the square fiber, but has little impact on the elastic deformation for all off-axis angles. The effect of fiber shapes on overall responses is enhanced with increasing off-axis angles but weakens with increasing strain rate.

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Fibre Bragg grating strain sensor and study of its packaging material for use in critical analysis on steel structure

Cited by 36 publications

References 14 publications

Comparison of Bragg and Polarimetric Optical Fiber Sensors for Stress Monitoring in Composite Materials

Comparison of Bragg and Polarimetric Optical Fiber Sensors for Stress Monitoring in Composite Materials

Pitted Corrosion Detection of Thermal Sprayed Metallic Coatings Using Fiber Bragg Grating Sensors

Fiber Cross-Section Shape Effect on Rate-Dependent Behavior of Polymer Matrix Composites with Fiber Bragg Grating Sensors

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