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Methodology design of ultrasound testing of composite propellers
 Horňák, Pavel ; Černoch, Jakub (referee) ; Katrňák, Tomáš (advisor)
Non-destructive testing is a big concept in the field of aerospace composites. In particular, the ultrasonic defectoscopy method, the application of which to laminate aircraft propellers is the main interest of this paper. The introductory chapters introduce the propellers and the material used for their manufacturing. The focus is then on the process of manufacturing laminate propellers from carbon and glass fibre. From a selection of non-destructive methods, a recommended methodology relying mainly on ultrasonic defectoscopy is compiled. The selected Dolphicam 2+ device is described with its features and its settings calibrated on a manufactured test specimen containing predefined artificial structure defects. The evaluation shows a significant improvement in the visibility of individual defects located at different depths by using the calibrated setup. The improvement is quantified by the amplitude gain of the received signal compared to the signal captured using the default setting. The resulting output are specific recommendations for both setup changes and propeller ultrasonic testing methodologies along with real-world application. The work thus serves as a template for ultrasonic defectoscopy of laminate propellers not only for the device mentioned.
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