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Original title:
Investigation of composite material degradation indicators using acoustic measurement: comparison with laser vibrometry
Authors: Fíla, Tomáš ; Urushadze, Shota ; Kytýř, Daniel ; Valach, Jaroslav ; Šperl, Martin
Document type: Papers
Conference/Event: Bilateral Czech/German Symposium, Experimental methods and numerical simulation in engineering sciences/13./, Telč (CZ), 2012-06-05 / 2012-06-08
Year: 2012
Language: eng
Abstract: 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.
Keywords: attenuation decrement; fatique; fibre composite; material degradation
Project no.: SGS12/205/OHK2/3T/16 (CEP), GAP105/10/2159 (CEP)
Funding provider: Grant Agency of the Czech Technical University in Prague, GA ČR
Host item entry: Proceedings of XIIIth Bilateral Czech / German Symposium Experimental methods and numerical simulation in engineering sciences, ISBN 978-80-01-05062-0
Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0214196
Permalink: http://www.nusl.cz/ntk/nusl-135440
The record appears in these collections:
Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
Conference materials > Papers
Authors: Fíla, Tomáš ; Urushadze, Shota ; Kytýř, Daniel ; Valach, Jaroslav ; Šperl, Martin
Document type: Papers
Conference/Event: Bilateral Czech/German Symposium, Experimental methods and numerical simulation in engineering sciences/13./, Telč (CZ), 2012-06-05 / 2012-06-08
Year: 2012
Language: eng
Abstract: 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.
Keywords: attenuation decrement; fatique; fibre composite; material degradation
Project no.: SGS12/205/OHK2/3T/16 (CEP), GAP105/10/2159 (CEP)
Funding provider: Grant Agency of the Czech Technical University in Prague, GA ČR
Host item entry: Proceedings of XIIIth Bilateral Czech / German Symposium Experimental methods and numerical simulation in engineering sciences, ISBN 978-80-01-05062-0
Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0214196
Permalink: http://www.nusl.cz/ntk/nusl-135440
The record appears in these collections:
Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
Conference materials > Papers
Record created 2013-01-04, last modified 2021-11-24