This article describes experimental and simulation results for phased array ultrasonic inspection of an aluminum alloy isogrid stiffener element containing notches emanating from bolt holes. Good qualitative agreement was observed between experimental results and modeling predictions with regards to flaw response indications. The simulations were extremely important in helping to understand experimental results, even though the isogrid stiffener element solid model could not include the top section of the isogrid element for flaw response calculations. In a few cases, indications seen in the experimental results and expected from the simulation were not seen. The simulation software cannot currently model creeping waves, but future versions are being developed to address this limitation. The simulations compared well enough to the experimental results in a qualitative sense that the researchers would have confidence in using them to predict significant inspection results. Future simulation work with isogrid stiffener element samples will be performed which examine other flaw configurations and in which CIVA batch processing facilities are utilized to perform parametric studies. It would be interesting to vary flaw size, transducer frequency, and include material noise and attenuation in simulations in order to approximate limits of detectability for various inspection scenarios.
Ultrasonic phased array inspection experiments and simulations for an isogrid structural element with cracks
Experimente und Simulationen mit phasengesteuerten Ultraschallgruppenstrahlern für eine gleichmäßige Gitterstruktur mit Rissen
2009
8 Seiten, 6 Bilder, 20 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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