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22 April 2020 Diffraction grating based measurement of the modal behavior of fast rotating composite discs (Conference Presentation)
Julian Lich, Tino Wollmann, Hao Zhang, Angelos Filippatos, Robert Kuschmierz, Maik Gude, Jürgen Czarske
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Proceedings Volume 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV; 113800J (2020) https://doi.org/10.1117/12.2557732
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only
Abstract
For performance improvement and failure prediction, numerical models are necessary to describe the modal behavior of GFRP rotors as a function of their damage state and rotational speed. Model validation requires in-process measurements. We show that the diffraction grating method enables simultaneous strain and tilt measurements with precisions <20 με and <4’’ and a spatial resolution <5 mm at surface speeds >250 m/s. An in-situ determination of the damage state by strain field analysis and vibration measurements are performed on a moving rotor and compared with the results of piezoelectric strain gauges, a vibrometer and a distance sensor.
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Julian Lich, Tino Wollmann, Hao Zhang, Angelos Filippatos, Robert Kuschmierz, Maik Gude, and Jürgen Czarske "Diffraction grating based measurement of the modal behavior of fast rotating composite discs (Conference Presentation)", Proc. SPIE 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV, 113800J (22 April 2020); https://doi.org/10.1117/12.2557732
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KEYWORDS
Diffraction gratings
Composites
Sensors
Vibrometry
Calibration
Failure analysis
Fiber reinforced polymers
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