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  • This paper deals with investigation of acoustic material degradation indicator (attenuation decrement drop of selected natural frequency) measured by a custom-built experimental device. Samples of C/PPS fibre composite material were analyzed. Acoustic signals were recorded and processed using spectral analysis and sound signal regression. Data measured by this method were verified by comparative experiment. Specimens were simultaneously measured using both acoustic experimental device and laser vibrometer. Modal analysis of the specimen were carried out prior to the experiment. This enabled assessment of specimens natural modes and therefore the best impact zone. In total, 10 measurements were performed for each specimen at the same level of degradation. Measured data were then processed and compared. The specimens were repetitively measured after designated number of loading cycles. To conclude, the data assessed using acoustic measurements are comparable in terms of precision, reproducibility and reliability with results from laser vibrometer and the method is suitable for evaluation of material degradation.
  • This paper deals with investigation of acoustic material degradation indicator (attenuation decrement drop of selected natural frequency) measured by a custom-built experimental device. Samples of C/PPS fibre composite material were analyzed. Acoustic signals were recorded and processed using spectral analysis and sound signal regression. Data measured by this method were verified by comparative experiment. Specimens were simultaneously measured using both acoustic experimental device and laser vibrometer. Modal analysis of the specimen were carried out prior to the experiment. This enabled assessment of specimens natural modes and therefore the best impact zone. In total, 10 measurements were performed for each specimen at the same level of degradation. Measured data were then processed and compared. The specimens were repetitively measured after designated number of loading cycles. To conclude, the data assessed using acoustic measurements are comparable in terms of precision, reproducibility and reliability with results from laser vibrometer and the method is suitable for evaluation of material degradation. (en)
Title
  • Investigation of Compostie Material Degradation Indicators Using Acoustic Measurement: Comparison with Laser Vibrometry
  • Investigation of Compostie Material Degradation Indicators Using Acoustic Measurement: Comparison with Laser Vibrometry (en)
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  • Investigation of Compostie Material Degradation Indicators Using Acoustic Measurement: Comparison with Laser Vibrometry
  • Investigation of Compostie Material Degradation Indicators Using Acoustic Measurement: Comparison with Laser Vibrometry (en)
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  • RIV/68407700:21260/12:00193778!RIV13-MSM-21260___
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  • S, Z(MSM6840770043)
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  • 142882
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  • RIV/68407700:21260/12:00193778
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  • attenuation decrement; fibre composite; material degradation; fatique (en)
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  • [322E9E10BF41]
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  • Telč
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  • Praha
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  • Experimental Methods and Numerical Simulation in Engineering Sciences, Proceedings of XIIIth Bilateral Czech/German Symposium
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  • Kytýř, Daniel
  • Valach, Jaroslav
  • Fíla, Tomáš
  • Urushadze, S.
  • Šperl, M.
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  • České vysoké učení technické v Praze. Fakulta dopravní
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  • 978-80-01-05062-0
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  • 21260
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