Experimental Mechanics

, Volume 31, Issue 4, pp 360–365

Determination of fracture parameters using embedded fiber-optic sensors


  • N. Narendran
    • Mechanical Technology Incorporated
  • A. Shukla
    • Dynamic Photomechanics Laboratory, Department of Mechanical EngineeringUniversity of Rhode Island Rhode Island
  • S. V. Letcher
    • Department of PhysicsUniversity of Rhode Island

DOI: 10.1007/BF02325994

Cite this article as:
Narendran, N., Shukla, A. & Letcher, S.V. Experimental Mechanics (1991) 31: 360. doi:10.1007/BF02325994


The applicability of embedded fiber-optic sensors for the determination of fracture parameters is demonstrated. A Mach-Zehnder interferometric setup is used and mode-1 stress-intensity factors are obtained by embedding single-mode fibers in single-edge-notched specimens fabricated from Plexiglas. Optical fibers are embedded in-plane to measure axial strains at various depths and also in the transverse direction to measure the transverse strains, from which stress-intensity factors are determined. In both cases the experimental results compare well with the theoretical predictions.

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© Society for Experimental Mechanics, Inc. 1991