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8 February 1999 Application of NDE technologies to support in-service health monitoring of flexible composite components
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The Carderock Division of the Naval Surface Warfare Center is evaluating nondestructive evaluation techniques for the inspection of flexible rubber composites in a shipboard service environment. The composite components are constructed of low-loss rubber materials, with several layers of reinforcement fabric located in the mid-thickness of the material. In a preliminary investigation, specimens aged in a laboratory environment and specimens removed form in-service platforms were inspected using near-field microwave techniques. The aged specimens contained small cracks and surface imperfections, while the in-service specimens exhibited delaminations between the rubber base material and the fabric plies. Inspections using a 33.375 GHz, open-ended rectangular waveguide demonstrated the ability to detect delaminations between the rubber casings and fabric plies, as well as for the detection of cord breakage of the fibers. Additional work is being planned to quantify the inspection capabilities relative to an acceptance criterion and to conduct in-service pilot studies with naval inspection personnel.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lawrence M. Brown, Michele R. Novack, Nasser Qaddoumi, and Tim Bigelow "Application of NDE technologies to support in-service health monitoring of flexible composite components", Proc. SPIE 3585, Nondestructive Evaluation of Aging Materials and Composites III, (8 February 1999);

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