Surface-mounted bare and packaged fiber bragg grating sensors for measuring rock strain in uniaxial testing

Isah, B.W. and Mohamad, H. (2021) Surface-mounted bare and packaged fiber bragg grating sensors for measuring rock strain in uniaxial testing. Sensors, 21 (9).

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The paper explores the possibility of using high-resolution fiber Bragg grating (FBG) sensing technology for on-specimen strain measurement in the laboratory. The approach provides a means to assess the surface deformation of the specimen, both the axial and radial, through a chain of FBG sensor (C-FBG), in a basic setup of a uniaxial compression test. The method is cost-effective, straightforward and can be commercialized. Two C-FBG; one was applied directly to the sample (FBGBare ), and the other was packaged (FBGPack) for ease of application. The approach measures the local strain with high-resolution and accuracy levels that match up to the existing local strain measuring sensors. The approach enables the evaluation of small-strain properties of the specimen intelligently. The finite element model analysis deployed has proven the adaptability of the technique for measuring material deformation. The adhesive thickness and packaging technique have been shown to influence the sensitivity of the FBG sensors. Owing to the relative ease and low-cost of instrumentation, the suggested method has a great potential to be routinely applied for elemental testing in the laboratory. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type:Article
Impact Factor:cited By 0
Uncontrolled Keywords:Adhesives; Compression testing; Cost effectiveness; Costs; Deformation; Electric sensing devices; Fiber optic sensors; Strain measurement; Surface testing, Adhesive thickness; Fiber Bragg Grating Sensors; Finite element model analysis; Material deformation; Packaging techniques; Sensing technology; Surface deformation; Uni-axial compression tests, Fiber Bragg gratings
ID Code:23785
Deposited By: Ms Sharifah Fahimah Saiyed Yeop
Deposited On:19 Aug 2021 13:10
Last Modified:19 Aug 2021 13:10

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