비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제30권3호
  • /
  • Pages.236-243
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  • 2010
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  • 1225-7842(pISSN)
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  • 2287-402X(eISSN)
한국비파괴검사학회 (The Korean Society for Nondestructive Testing)
권호 표지

Strain Transmission Characteristics of Packaged Fiber Bragg Grating Sensors for Structural Health Monitoring

  • Cho, Sung-In (Division of Aerospace Engineering, KAIST) ;
  • Yoo, Seung-Jae (Division of Aerospace Engineering, KAIST) ;
  • Kim, Eun-Ho (Division of Aerospace Engineering, KAIST) ;
  • Lee, In (Division of Aerospace Engineering, KAIST) ;
  • Kwon, Il-Bum (Center for Safety Measurement, Korea Research Institute of Standards and Science) ;
  • Yoon, Dong-Jin (Center for Safety Measurement, Korea Research Institute of Standards and Science)
  • 투고 : 2010.03.25
  • 심사 : 2010.06.10
  • 발행 : 2010.06.30
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초록

Fiber Bragg grating(FBG) sensor arrays can be used to monitor the mechanical behavior of the large composite structures such as wind turbine rotor blades and aircrafts. However, brittle FBG sensors, especially multiplexed FBG sensors are easily damaged when they are installed in the flexible structures. As a protection of brittle FBG sensors, epoxy packaged FBG sensors have been presented in this paper. Finite element analysis and experiments were performed to evaluate the effects of adhesives, packaging materials and the bonding layer thickness on the strain transmission. Two types of epoxy were used for packaging FBG sensors and the sensor probes were attached with various bonding layer thickness. It was observed that thin bonding layer with high elastic modulus ratio of the adhesive to packaging provided good strain transmission. However, the strain transmission was significantly decreased when elastic modulus of the adhesive was much lower than the packaged FBG sensor probe's one.

키워드

참고문헌

  1. Cheng, C. C., Lo, Y. L., Pun, B. S., Chang, Y. M. and Li, W. Y. (2005) An Investigation of Bonding-Layer Characteristics of Substrate-Bonded Fiber Bragg Grating, Journal of Lightwave Technology, Vol. 23, No. 11, pp. 3907-3915 https://doi.org/10.1109/JLT.2005.856235
  2. Ciang, C. C., Lee, J. R. and Bang, H. J. (2008) Structural Health Monitoring for a Wind Turbine System: A Review of Damage Detection Methods, Measurement Science & Technology, Vol. 19, No. 12
  3. Doyle, C. (2003) Fiber Bragg Grating Sensors - an Introduction to Bragg Gratings and Interrogation Techniques, Smart Fibers Ltd. Report
  4. Ecke, W. and Schroeder, K. (2008) Fiber Bragg Grating Sensor System for Operational Load Monitoring of Wind Turbine Blades, Proc. of SPIE, Vol. 6933, No. 18
  5. Kang, L. H. (2004) Estimation of Structural Deformation Using Fiber Optic Bragg Grating Sensor Array, Master's Thesis, KAIST
  6. Kim, W. S. (2003) Damage Detection Techniques of Composite Laminates with Embedded FBG Sensors, Master's Thesis, Department of Aerospace Engineering KAIST
  7. Li, W. Y., Cheng, C. C. and Lo, Y. L. (2009) Investigation of Strain Transmission of Surface-Bonded FBGs Used as Strain Sensors, Sensors and Actuators, Vol. 149, No. 2, pp. 201-207 https://doi.org/10.1016/j.sna.2008.11.011
  8. Lin, Y. B., Chang, K. C., Chern, J. C. and Wang, L. A. (2005) Packaging Methods of Fiber-Bragg Grating Sensors in Civil Structure Applications, IEEE Sensors Journal, Vol. 5, No. 3, pp. 419-424 https://doi.org/10.1109/JSEN.2005.844539
  9. Micron Optics, (2005) Optical Fiber Sensors Guide, pp. 6-7
  10. Papanikos, P., Tserpes, K. I. and Pantelakis, S. (2007) Initiation and Progression of Composite Patch Debonding in Adhesively Repaired Cracked Metallic Sheets, Composite Structures, Vol. 81, No. 2, pp. 303-311 https://doi.org/10.1016/j.compstruct.2006.08.022
  11. Paquette, J. A. and Veers, P. S. (2007) Increased Strength in Wind Turbine Blades through Innovative Structural Design, Sandia National Laboratories
  12. Wnuk, V. P. (2005) Process for Mounting and Packaging of Fiber Bragg Grating Strain Sensors for Use in Harsh Environment Applications, Proceedings of SPIE, Vol. 5758, No. 6, pp. 46-53
  13. Zayas, J. R., Roach, D. P., Rumsey, M. A., Allen, W. R. and Horsley, D. A. (2007) Low-Cost Fiber Bragg Grating Interrogation System for In-Situ Assessment of Structures, Proceedings of SPIE Vol. 6529, No. 110