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30 March 2009 Fatigue crack growth monitoring at elevated temperatures using multiplexed Fiber Bragg Gratings
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Abstract
Light-weight and multiplexable, Fiber Bragg Grating (FBG) optical sensors allow the integration of many sensors along a single electrically passive and electromagnetic interference immune optical fiber. In this paper, we describe the use of multiple FBGs for monitoring and early stage detection of fatigue crack growth. We provide experimental results over a range of temperatures for fatigue crack monitoring in titanium alloy specimens subjected to periodic loading for tens of thousands of cycles and demonstrate detection of early-stage fatigue crack extension.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard J. Black, David J. Zare, Levy Oblea, Behzad M. Moslehi, Shamachary Sathish, Norman Schell, and Kumar V. Jata "Fatigue crack growth monitoring at elevated temperatures using multiplexed Fiber Bragg Gratings", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72922K (30 March 2009); https://doi.org/10.1117/12.815887
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