A case study is presented for using models in eddy current NDE design for crack detection in Shuttle Reaction Control System thruster components. Simulations using the volume integral method with some model approximations were found to show good agreement with experimental results. Sensitivity studies were performed to explore the ideal probe orientations for varying crack lengths. However, it was found that to properly compare competing NDE technique designs, a full model-assisted POD evaluation that incorporates an assessment of the signal and noise distributions as a function of varying flaw size (crack length) is really necessary. Although performing a full model-assisted POD evaluation is not a trivial task, assumptions can be made in the evaluation process that can lead to a reasonable answer without excessive computational expense. Future work is proposed to perform a more complete MAPOD study, explore hybrid models to efficiently solve for multiscale geometries, and investigate optimum designs for improving detection of deep cracks.
Models in the design and validation of eddy current inspection for cracking in the Shuttle Reaction Control System thruster
Modelle zum Design und zur Bewertung der Wirbelstromprüfung bei der Rissprüfung im Shuttle Reaktionskontrollsystem zur Schuberzeugung
2008
8 Seiten, 8 Bilder, 10 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Space Shuttle reaction control thruster
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