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Proceedings Paper

Aircraft fiber optic structural health monitoring
Author(s): Nezih Mrad
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Paper Abstract

Structural Health Monitoring (SHM) is a sought after concept that is expected to advance military maintenance programs, increase platform operational safety and reduce its life cycle cost. Such concept is further considered to constitute a major building block of any Integrated Health Management (IHM) capability. Since 65% to 80% of military assets' Life Cycle Cost (LCC) is devoted to operations and support (O&S), the aerospace industry and military sectors continue to look for opportunities to exploit SHM systems, capability and tools. Over the past several years, countless SHM concepts and technologies have emerged. Among those, fiber optic based systems were identified of significant potential. This paper introduces the elements of an SHM system and investigates key issues impeding the commercial implementation of fiber optic based SHM capability. In particular, this paper presents an experimental study of short gauge, intrinsic, spectrometric-based in-fiber Bragg grating sensors, for potential use as a component of an SHM system. Fiber optic Bragg grating sensors are evaluated against resistance strain gauges for strain monitoring, sensitivity, accuracy, reliability, and fatigue durability. Strain field disturbance is also investigated by "embedding" the sensors under a photoelastic coating in order to illustrate sensor intrusiveness in an embedded configuration.

Paper Details

Date Published: 10 May 2012
PDF: 10 pages
Proc. SPIE 8368, Photonic Applications for Aerospace, Transportation, and Harsh Environment III, 83680F (10 May 2012); doi: 10.1117/12.921037
Show Author Affiliations
Nezih Mrad, Defence Research and Development Canada, Ottawa (Canada)


Published in SPIE Proceedings Vol. 8368:
Photonic Applications for Aerospace, Transportation, and Harsh Environment III
Alex A. Kazemi; Nicolas Javahiraly; Allen S. Panahi; Simon Thibault, Editor(s)

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