Comprehensive and accurate tests of welded components have become increasingly important as NASA develops new hardware, such as Ares rocket segments, for future exploration missions. Simulation and modeling will play an increased role in the future of nondestructive testing in order to better understand the physics of the testing process and help explain the experimental results. It will also help to prove or disprove the feasibility of a test technique or scenario, help optimize testing, and allow, to a first approximation, determination of limits of detectability. This paper describes simulation/modeling and its comparison to experimental results for phased array ultrasonic testing of a steel skin-to-flange test sample with a side-drilled hole in the interior weld. Good qualitative agreement was observed between experimental results and modeling predictions with regards to ultrasonic reflection response from the side-drilled hole in the weld. To quantitatively test the detection limits of a nondestructive technique for a given test, a signal to noise analysis and attention to model assumptions are required. Future applications of the simulation techniques will be applied for important structures and testing scenarios at NASA.
Ultrasonic phased array testing simulations of welded components at NASA
Simulation bei der Prüfung geschweißter Komponenten der NASA mit Ultraschall-Gruppenstrahler
Materials Evaluation ; 67 , 1 ; 60-65
2009
6 Seiten, 10 Bilder, 13 Quellen
Article (Journal)
English
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