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Journal of Engineering
Volume 2013, Article ID 486326, 6 pages
Research Article

Damage Assessment in a SiC-fiber reinforced Ceramic Matrix Composite

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

Received 29 August 2012; Accepted 23 October 2012

Academic Editor: Sheng-Rui Jian

Copyright © 2013 Konstantinos G. Dassios and Theodore E. Matikas. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Assessment of the fracture behavior of a SiC-fbre-reinforced barium osumilite (BMAS) ceramic matrix composite tested under static and cyclic tension conditions is reported herein. Notched specimens were used in order to limit material damage within a predefined gauge length. Imposition of successive unloading/reloading loops was found to result in an increase by 20% in material strength as compared to pure tension; the observed increase is attributed to energy dissipation from large-scale interfacial debonding phenomena that dominated the post-elastic tensile behaviour of the composite. Cyclic loading also helped establish the axial residual stress state of the fibres in the composite of tensile nature via a well-defined common intersection point of unloading-reloading cycles. A translation vector approach in the stress-strain plane was successful in establishing the residual stress-free properties of the composite and in reconciling the scatter noted in elastic properties of specimens with respect to theoretical expectations.