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Materials 2015, 8(6), 3316-3333; doi:10.3390/ma8063316

Tension-Tension Fatigue Behavior of Unidirectional C/Sic Ceramic-Matrix Composite at Room Temperature and 800 °C in Air Atmosphere

College of Civil Aviation, Nanjing University of Aeronautics and Astronautics No.29, Yudao St., Nanjing 210016, China
Academic Editor: Javier Narciso
Received: 20 April 2015 / Revised: 17 May 2015 / Accepted: 29 May 2015 / Published: 8 June 2015
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Abstract

The tension-tension fatigue behavior of unidirectional C/SiC ceramic-matrix composite at room temperature and 800 °C under air has been investigated. The fatigue hysteresis modulus and fatigue hysteresis loss energy corresponding to different number of applied cycles have been analyzed. The fatigue hysteresis loops models for different interface slip cases have been derived based on the fatigue damage mechanism of fiber slipping relative to matrix in the interface debonded region upon unloading and subsequent reloading. The fiber/matrix interface shear stress has been estimated for different numbers of applied cycles. By combining the interface shear stress degradation model and fibers strength degradation model with fibers failure model, the tension-tension fatigue life S-N curves of unidirectional C/SiC composite at room temperature and 800 °C under air have been predicted. View Full-Text
Keywords: ceramic-matrix composites (CMCs); C/SiC; fatigue; S-N curve; hysteresis loops; matrix multicracking; interface debonding ceramic-matrix composites (CMCs); C/SiC; fatigue; S-N curve; hysteresis loops; matrix multicracking; interface debonding
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. (CC BY 4.0).

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MDPI and ACS Style

Li, L. Tension-Tension Fatigue Behavior of Unidirectional C/Sic Ceramic-Matrix Composite at Room Temperature and 800 °C in Air Atmosphere. Materials 2015, 8, 3316-3333.

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