Original title: Investigation of C/PPS Composites Degradation Process Using Acoustic Measurement
Authors: Fíla, Tomáš ; Valach, Jaroslav ; Kytýř, Daniel ; Šperl, Martin
Document type: Papers
Conference/Event: Experimental Stress Analysis 2011, Znojmo (CZ), 2011-06-06 / 2011-06-09
Year: 2011
Language: eng
Abstract: The article deals with assessment of fatigue degradation of C/PPS composites using simple acoustic measurement technique. Changes in natural frequency and attenuation decrement were chosen as indicators of fatigue damage accumulation in the studied composite material. New testing device was developed for acoustic measurement. The experimental setup was designed to chime the specimen by repeatable force of stiff striker exciting a specific natural mode of vibration and to record the acoustic response of the specimen to the impact simultaneously. From the power spectral density of the signal the natural frequency was obtained. Using the same signal, the attenuation decrement was estimated from regression of the its envelope.
Keywords: acoustic measurement; material degradation; natural frequency
Project no.: CEZ:AV0Z20710524 (CEP)
Host item entry: EAN Proccedings, ISBN 978-80-214-4275-7

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/11104/0197737

Permalink: http://www.nusl.cz/ntk/nusl-55734


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
Conference materials > Papers