Damage Accumulation in Cyclically-Loaded Glass-Ceramic Matrix Composites Monitored by Acoustic Emission-Reference-Cited by-同舟云学术

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

Published:2013 Issue: Volume:2013 Page:1-10
ISSN:1537-744X
Container-title:The Scientific World Journal
language:en
Short-container-title:The Scientific World Journal

Author:

Aggelis D. G.¹²^ORCID,Dassios K. G.²,Kordatos E. Z.²,Matikas T. E.²^ORCID

Affiliation:

1. Department of Mechanics of Materials and Constructions, Free University of Brussels, Pleinlaan 2, 1050 Brussels, Belgium

2. Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece

Abstract

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.

Publisher

Hindawi Limited

Subject

General Environmental Science,General Biochemistry, Genetics and Molecular Biology,General Medicine

Link

http://downloads.hindawi.com/journals/tswj/2013/869467.pdf

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