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    Strain transfer analysis of a clamped fiber Bragg grating sensor

    Access Status
    Open access via publisher
    Authors
    Sun, L.
    Li, C.
    Li, Jun
    Zhang, C.
    Ding, X.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Sun, L. and Li, C. and Li, J. and Zhang, C. and Ding, X. 2017. Strain transfer analysis of a clamped fiber Bragg grating sensor. Applied Sciences (Switzerland). 7 (2).
    Source Title
    Applied Sciences (Switzerland)
    DOI
    10.3390/app7020188
    ISSN
    2076-3417
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/51874
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 by the authors.Clamped fiber Bragg grating (FBG) sensors have been widely applied in engineering strain measurements due to their advantages of high flexibility and efficiency. However, due to the existence of the interlayer, the strain measured by the encapsulated FBG sensor is not equal to the strain of the host material, which causes strain measurement errors. In this paper, the strain transfer analysis of a clamped FBG sensor based on the shear-lag theory is conducted to improve the accuracy of strain measurements. A novel theoretical model for the axial strain distribution of a clamped FBG sensor is proposed. It is also discussed how the gauge ratio and interlayer thickness affect the strain transfer rate. The accuracy of the proposed theoretical model is verified by experimental tensile tests. The theoretical value of the strain transfer rate matches well with the tested value.

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