Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission

Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission

Barium osumilite (BMAS) ceramic matrix composites reinforced with SiC-Tyranno fibers are tested in a cyclic loading protocol. Broadband acoustic emission (AE) sensors are used for monitoring the occurrence of different possible damage mechanisms. Improved use of AE indices is proposed by excluding l...

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Main Authors: D. G. Aggelis, K. G. Dassios, E. Z. Kordatos, T. E. Matikas
Format: Article
Language:English
Published: Hindawi Limited 2013-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1155/2013/869467
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spelling doaj-2b07e4a9cb8b45dcaeb8dcde5f2edcec2020-11-25T01:39:57ZengHindawi LimitedThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/869467869467Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic EmissionD. G. Aggelis0K. G. Dassios1E. Z. Kordatos2T. E. Matikas3Department of Mechanics of Materials and Constructions, Free University of Brussels, Pleinlaan 2, 1050 Brussels, BelgiumDepartment of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, GreeceDepartment of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, GreeceDepartment of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, GreeceBarium osumilite (BMAS) ceramic matrix composites reinforced with SiC-Tyranno fibers are tested in a cyclic loading protocol. Broadband acoustic emission (AE) sensors are used for monitoring the occurrence of different possible damage mechanisms. Improved use of AE indices is proposed by excluding low-severity signals based on waveform parameters, rather than only threshold criteria. The application of such improvements enhances the accuracy of the indices as accumulated damage descriptors. RA-value, duration, and signal energy follow the extension cycles indicating moments of maximum or minimum strain, while the frequency content of the AE signals proves very sensitive to the pull-out mechanism.http://dx.doi.org/10.1155/2013/869467
collection DOAJ
language English
format Article
sources DOAJ
author D. G. Aggelis
K. G. Dassios
E. Z. Kordatos
T. E. Matikas
spellingShingle D. G. Aggelis
K. G. Dassios
E. Z. Kordatos
T. E. Matikas
Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission
The Scientific World Journal
author_facet D. G. Aggelis
K. G. Dassios
E. Z. Kordatos
T. E. Matikas
author_sort D. G. Aggelis
title Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission
title_short Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission
title_full Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission
title_fullStr Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission
title_full_unstemmed Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission
title_sort damage accumulation in cyclically-loaded glass-ceramic matrix composites monitored by acoustic emission
publisher Hindawi Limited
series The Scientific World Journal
issn 1537-744X
publishDate 2013-01-01
description Barium osumilite (BMAS) ceramic matrix composites reinforced with SiC-Tyranno fibers are tested in a cyclic loading protocol. Broadband acoustic emission (AE) sensors are used for monitoring the occurrence of different possible damage mechanisms. Improved use of AE indices is proposed by excluding low-severity signals based on waveform parameters, rather than only threshold criteria. The application of such improvements enhances the accuracy of the indices as accumulated damage descriptors. RA-value, duration, and signal energy follow the extension cycles indicating moments of maximum or minimum strain, while the frequency content of the AE signals proves very sensitive to the pull-out mechanism.
url http://dx.doi.org/10.1155/2013/869467
work_keys_str_mv AT dgaggelis damageaccumulationincyclicallyloadedglassceramicmatrixcompositesmonitoredbyacousticemission
AT kgdassios damageaccumulationincyclicallyloadedglassceramicmatrixcompositesmonitoredbyacousticemission
AT ezkordatos damageaccumulationincyclicallyloadedglassceramicmatrixcompositesmonitoredbyacousticemission
AT tematikas damageaccumulationincyclicallyloadedglassceramicmatrixcompositesmonitoredbyacousticemission
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