Strain transferring mechanism analysis of the surface-bonded FBG sensor.

The mechanical analysis model of surface-bonded fiber Bragg grating (FBG) shear strain transfer is established in consideration of the linear viscoelastic effect of the adhesive layer, which is simplified as a standard linear solid model. And the strain transfer relation is acquired and validated by anchor bar uniaxial tension experiments. There is good correspondence between calculated values and experimental results. Finally, the influences of shear modulus, length and width of the adhesive layer, and thickness of the interlayer on the instantaneous and quasistatic strain transfer are analyzed by numerical simulation.

[1]  F. Ansari,et al.  MECHANICS OF BOND AND INTERFACE SHEAR TRANSFER IN OPTICAL FIBER SENSORS , 1998 .

[2]  F. R. Mahamd Adikan,et al.  Fiber Bragg grating based sensing system: Early corrosion detection for structural health monitoring , 2016 .

[3]  Tong Sun,et al.  Design and in-the-field performance evaluation of compact FBG sensor system for structural health monitoring applications , 2009 .

[4]  Characteristics of strain transfer and the reflected spectrum of a metal-coated fiber Bragg grating sensor , 2017 .

[5]  Lin Xu,et al.  Strain transferring mechanism analysis of the substrate-bonded FBG sensor , 2018 .

[6]  Christopher K.Y. Leung,et al.  Investigation of the strain transfer for surface-attached optical fiber strain sensors , 2008 .

[7]  Li Sun,et al.  Strain Transfer Analysis of a Clamped Fiber Bragg Grating Sensor , 2017 .

[8]  Raymond M. Measures,et al.  The mechanical load transfer into a distributed optical fiber sensor due to a linear strain gradient: embedded and surface bonded cases , 1999 .

[9]  Lech Murawski,et al.  Practical Application of Monitoring System Based on Optical Sensors for Marine Constructions , 2012 .

[10]  Yu-Lung Lo,et al.  Investigation of strain transmission of surface-bonded FBGs used as strain sensors , 2009 .

[11]  Libo Yuan,et al.  Strain monitoring in FRP laminates and concrete beams using FBG sensors , 2001 .

[12]  Jilong Li,et al.  Interface transferring mechanism and error modification of embedded FBG strain sensor based on creep: Part I. linear viscoelasticity , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.