An investigation of interface transferring mechanism of surface-bonded fiber Bragg grating sensors

Wu, Rujun; Fu, Kunkun; Tian, Chen

doi:10.1063/1.4997069

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…According to the calculation method proposed by Wu et al, 19 the average strain transfer efficiency η can be calculated as follows:…”

Section: Structure and Strain Transfer Process Of The Cfrp-fbg Sensorsmentioning

confidence: 99%

“…According to the calculation method proposed by Wu et al., 19 the average strain transfer efficiency η can be calculated as follows: η=∫−LLεfdx∫−LLεmdx=α(1−KL sinh(kL)KL cosh(kL)),where α=(1+Efk(1+μ)β2πES cosh(kL))−1, μ, and β are the parameters related to the matrix, E is the elastic modulus of each layer, ρ is the density of each layer, and L,H,H1,D,h, and r are the geomet...…”

Section: Theoretical Approachmentioning

confidence: 99%

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Design and performance study of real-time, reliable, and highly accurate carbon fiber reinforced polymer-fiber Bragg grating sensors for wind turbine blade strain monitoring

Wang,

Ma,

Peng

et al. 2024

Opt. Eng.

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We designed a CFRP-FBG sensor with a "sandwich" structure consisting of carbon fiber reinforced polymer (CFRP) encapsulation layers and a fiber Bragg grating (FBG) for strain monitoring of wind turbine blades. This design aims to protect the FBG sensor while maximizing the strain transfer from the CFRP to the FBG sensor. Strain and temperature experiments showed that the linear correlation coefficient of the experimental CFRP-FBG sensor's central wavelength change-strain evolution curve was above 0.9999, and the repeatability error of the strain sensitivity coefficient was 0.1665%, demonstrating high accuracy and repeatability. Meanwhile, CFRP-FBG was tested in full-size turbine blades in operation, during which time they were subjected to millions of dynamic strain cycles and various loading environments. The results of 11 months of monitoring showed that the CFRP-FBG provides real-time, reliable, and highly accurate strain measurements and can meet the needs of long-term blade strain monitoring.

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“…According to the calculation method proposed by Wu et al, 19 the average strain transfer efficiency η can be calculated as follows:…”

Section: Structure and Strain Transfer Process Of The Cfrp-fbg Sensorsmentioning

confidence: 99%

Section: Theoretical Approachmentioning

confidence: 99%

Design and performance study of real-time, reliable, and highly accurate carbon fiber reinforced polymer-fiber Bragg grating sensors for wind turbine blade strain monitoring

Wang,

Ma,

Peng

et al. 2024

Opt. Eng.

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“…A number of analytical and experimental studies, by various authors, focus on this problem [47,48,49,50,51,52,53]. A model proposed to estimate the effects of shear lag in the limit where the elastic moduli of fiber coating and adhesive (acrylate glue) are negligible (only the shear moduli for these are considered) estimates the strain transfer coefficient K st as a function of the position along the fiber:

K_{s t} = \frac{ε_{f} (x)}{ε_{s}} = \frac{1 - c o s h (k_{2} x) / c o s h (k_{2} l / 2)}{k_{1}};

where

k_{1} = 1 + \frac{π r_{f}^{2}}{2 h r_{p}} \frac{E_{f}}{E_{s}};

and

k_{2} = \sqrt{k_{1} \cdot \frac{2 r_{p}}{π r_{f}^{2} E_{f}} \cdot \int_{0}^{\frac{π}{2}} {[\frac{r_{p} (1 - \sin θ)}{G_{a}} + \frac{r_{p}}{G_{p}} l n (\frac{r_{p}}{r_{f}})]}^{- 1} d θ}

…”

Section: Experimental Challenges Artifacts and Strategies Used Tmentioning

confidence: 99%

Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Jaime

Moya

Weickert

et al. 2017

Sensors

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In this work, we review single mode SiO2 fiber Bragg grating techniques for dilatometry studies of small single-crystalline samples in the extreme environments of very high, continuous, and pulsed magnetic fields of up to 150 T and at cryogenic temperatures down to <1 K. Distinct millimeter-long materials are measured as part of the technique development, including metallic, insulating, and radioactive compounds. Experimental strategies are discussed for the observation and analysis of the related thermal expansion and magnetostriction of materials, which can achieve a strain sensitivity (ΔL/L) as low as a few parts in one hundred million (≈10−8). The impact of experimental artifacts, such as those originating in the temperature dependence of the fiber’s index of diffraction, light polarization rotation in magnetic fields, and reduced strain transfer from millimeter-long specimens, is analyzed quantitatively using analytic models available in the literature. We compare the experimental results with model predictions in the small-sample limit, and discuss the uncovered discrepancies.

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Strain data correction of distributed optical fiber sensors using strain transfer model with variable shear lag parameters

Liu

2022

Automation in Construction

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An investigation of interface transferring mechanism of surface-bonded fiber Bragg grating sensors

Cited by 7 publications

References 15 publications

Design and performance study of real-time, reliable, and highly accurate carbon fiber reinforced polymer-fiber Bragg grating sensors for wind turbine blade strain monitoring

Design and performance study of real-time, reliable, and highly accurate carbon fiber reinforced polymer-fiber Bragg grating sensors for wind turbine blade strain monitoring

Fiber Bragg Grating Dilatometry in Extreme Magnetic Field and Cryogenic Conditions

Strain data correction of distributed optical fiber sensors using strain transfer model with variable shear lag parameters

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