Stress Analysis of Optical Fiber Sensor Embedded Composite Subjected to Tri-Axial Normal Loadings


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Optical fiber sensors have been developed during the past decade to measure a wide range of physical quantities such as strain and temperature. The perturbation of the surrounding field in the host due to the presence of the optical sensor will not only alter the values of the field variables being measured, but may also affect the integrity of the host. Resulting degradations can compromise the accuracy and long term reliability of the smart structure. The present paper focuses the attention on constitutent interaction between the optical fiber, coating, matrix and host material. An analytical model to predict the stress fields in the vicinity of the embedded optical fiber was derived. The theoretical development was based on the four concentric cylinders models which represented the optical fiber, protective coating, matrix and host material, respectively. The interfaces between each constitutent were assumed to be perfect bonds, so that the tractions and displacements were continuous across each interface. In this investigation, the host structure was subjected to three normal loadings along the axial directions. Numerical examples were presented to investigate the effects of the coating and host material on the stress distribution in the vicinity of the embedded optical fiber.



Key Engineering Materials (Volumes 364-366)

Edited by:

Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO




S. C. Her and B. R. Yao, "Stress Analysis of Optical Fiber Sensor Embedded Composite Subjected to Tri-Axial Normal Loadings ", Key Engineering Materials, Vols. 364-366, pp. 998-1002, 2008

Online since:

December 2007




[1] Y. Benveniste, G.J. Dvorak, T. Chen, Stress fields in composite with coated inclusions, Mechanics of Materials 7 (1989), p.305.


[2] A. Dasgupta, Y. Wan, J.S. Sirkis, Prediction of resin pocket geometry for stress analysis of optical fibers embedded in laminated composites, Smart Mater. Struct. 1 (1992), p.101.


[3] Dasgupta ,A., Sirkis, J.S., Importance of coating to optical fiber sensors embedded in smart structures, AIAA 30 (1992), p.1337.


[4] S. W. Case, G.P. Carman, Compression strength of composites containing embedded sensors or actuator. J. of Intelligent Material Systems and Structures 5 (1994), p.4.


[5] G. P. Carman, C. A. Ronald, K. L. Reifsnider, J.N. Reddy, Optimization of fiber coatings to minimize stress concentrations in composite materials, Journal of Composite Materials, 27 (1993), p.589.