Experimental Mechanics

, Volume 31, Issue 4, pp 360-365

First online:

Determination of fracture parameters using embedded fiber-optic sensors

  • N. NarendranAffiliated withMechanical Technology Incorporated
  • , A. ShuklaAffiliated withDynamic Photomechanics Laboratory, Department of Mechanical Engineering, University of Rhode Island Rhode Island
  • , S. V. LetcherAffiliated withDepartment of Physics, University of Rhode Island

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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.