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3 August 2001 Scanning ultrasonic spectroscopy for composite flywheels
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Composite flywheels are being considered as a replacement for chemical batteries aboard the International Space Station (ISS). Due to the serious consequences of a failure in a space environment, extensive testing of the flywheel systems must be conducted prior to flight certification. In addition to standard material testing and characterization, non destructive evaluation (NDE) of the rotors must be preformed to identify processing flaws and to understand the damage progression in a rotor under load. This paper describes the development of a scanning ultrasonic spectroscopy system for the non destructive evaluation of composite flywheels. Emphasis is placed on the novel resonance spectroscopy method that was investigated and its integration into a scanning system. Results of a scan of a composite ring standard and Plexiglas cylinder with known defects are presented and compared to ultrasonic pulse-echo c-scans.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard E. Martin and George Y. Baaklini "Scanning ultrasonic spectroscopy for composite flywheels", Proc. SPIE 4336, Nondestructive Evaluation of Materials and Composites V, (3 August 2001);

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