Investigation of the strain transfer for surface-attached optical fiber strain sensors

Wan, Kai Tai; Leung, Christopher Kin Ying; Olson, Noah G.

doi:10.1088/0964-1726/17/3/035037

Cited by 135 publications

(120 citation statements)

References 13 publications

(33 reference statements)

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“…However, it becomes large when the substrate is thin and made by low modulus materials. Wan et al (2008) studied strain transfer with stiff adhesive case with a 3D-FEM for a surface-mounted strain sensor and verified it by experiments. They found that the bond length and the bottom thickness are dominant factors besides side width and top thickness.…”

Section: Strain Transferring Mechanism For Surface-bonded Ofssmentioning

confidence: 95%

Mechanical Property and Strain Transferring Mechanism in Optical Fiber Sensors

Li¹,

Ren²,

Li³

2012

Fiber Optic Sensors

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Section: Strain Transferring Mechanism For Surface-bonded Ofssmentioning

confidence: 95%

Mechanical Property and Strain Transferring Mechanism in Optical Fiber Sensors

Li¹,

Ren²,

Li³

2012

Fiber Optic Sensors

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“…Zhou et al [16] investigated the influence of coating and adhesive on the strain transmission of embedded fiber optic sensors. Wan et al [17] investigated the influence of four geometric parameters of the adhesive, side width, top thickness, bonded length and bottom thickness, on the strain of the optical fiber. Most of the existing works that have studied the strain transfer between the optical fiber and host material have focused on the embedded optical fiber.…”

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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“…5. As the bottom of the sensor substrate is thin and the modulus is close to the substrate, the model is simplified to three parts: the tensile specimen, the substrate, and the fiber, and the specific parameters of each part are shown in Table 1 [12,13].…”

Section: Finite Element Methods Verificationmentioning

confidence: 99%

Large strain detection of SRM composite shell based on fiber Bragg grating sensor

Zhang¹,

Chang²,

Zhang³

et al. 2017

Photonic Sens

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There may be more than 2% strain of carbon fiber composite material on solid rocket motor (SRM) in some extreme cases. A surface-bonded silica fiber Bragg grating (FBG) strain sensor coated by polymer is designed to detect the large strain of composite material. The strain transfer relation of the FBG large strain sensor is deduced, and the strain transfer mechanism is verified by finite element simulation. To calibrate the sensors, the tensile test is done by using the carbon fiber composite plate specimen attached to the designed strain sensor. The results show that the designed sensor can detect the strain more than 3%, the strain sensitivity is 0.0762 pm/με, the resolution is 13.13με, and the fitting degree of the wavelength-strain curve fitting function is 0.9988. The accuracy and linearity of the sensor can meet the engineering requirements.

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Investigation of the strain transfer for surface-attached optical fiber strain sensors

Cited by 135 publications

References 13 publications

Mechanical Property and Strain Transferring Mechanism in Optical Fiber Sensors

Mechanical Property and Strain Transferring Mechanism in Optical Fiber Sensors

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

Large strain detection of SRM composite shell based on fiber Bragg grating sensor

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