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Prévision de la durée de vie des composites à matrice céramique auto cicatrisante, en fatigue statique, à haute température (= 800°C)

Abstract : Delayed failure of SiC/SiC woven composite is studied under static fatigue, in air, for intermediate temperatures (500°C – 800°C). Experimental results and fractographic examination are used to identify damage mechanisms. A multi-scale probabilistic facture based model is proposed to simulate damage kinetics in longitudinal tows. Microstructure is described with appropriate statistical distributions identified on fractographic investigations. Simulations demonstrate a significant effect of the microstructure on the lifetime of the tows. Microstructure – properties relations are established.
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https://hal-cnrs.archives-ouvertes.fr/tel-03607515
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Submitted on : Monday, March 14, 2022 - 8:44:52 AM
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Olivier de Melo-Loseille. Prévision de la durée de vie des composites à matrice céramique auto cicatrisante, en fatigue statique, à haute température (= 800°C). Physique [physics]. Université Bordeaux 1, 2010. Français. ⟨tel-03607515⟩

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