Název: Investigation of composite material degradation indicators using acoustic measurement: comparison with laser vibrometry
Autoři: Fíla, Tomáš ; Urushadze, Shota ; Kytýř, Daniel ; Valach, Jaroslav ; Šperl, Martin
Typ dokumentu: Příspěvky z konference
Konference/Akce: Bilateral Czech/German Symposium, Experimental methods and numerical simulation in engineering sciences/13./, Telč (CZ), 2012-06-05 / 2012-06-08
Rok: 2012
Jazyk: eng
Abstrakt: 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.
Klíčová slova: attenuation decrement; fatique; fibre composite; material degradation
Číslo projektu: SGS12/205/OHK2/3T/16 (CEP), GAP105/10/2159 (CEP)
Zdrojový dokument: Proceedings of XIIIth Bilateral Czech / German Symposium Experimental methods and numerical simulation in engineering sciences, ISBN 978-80-01-05062-0

Instituce: Ústav teoretické a aplikované mechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0214196

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-135440


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav teoretické a aplikované mechaniky
Konferenční materiály > Příspěvky z konference
 Záznam vytvořen dne 2013-01-04, naposledy upraven 2017-01-18.


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