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- W2056065275 abstract "The stress relaxation and creep behaviors of particulate composites consisting of SiC particles embedded in an oxynitride glass matrix were characterized for particle size and volume fraction from 3 to 150 μm and 0 to 40%, respectively. The presence of rigid particles results in significant decreases in the relaxation kinetics and creep rates. Furthermore, the apparent viscosity of the composites exhibits a strain dependence (strain hardening), and a critical strain, depending on both particle size and volume fraction, at which flow is apparently blocked has been successfully introduced to interpret the data. A preliminary study of the behavior at constant strain rates in the 10−5–10−1/s range, shows a tension–compression flow asymmetry as well as a shear thinning effect for strain rates above 10−3/s. Les comportements de relaxation mécanique et de fluage de composites particulaires constitués de particules de carbure de silicium dispersées dans une matrice de verre oxyazoté ont été caractérisés pour des tailles et des fractions volumiques de particules respectivement de 3 à 150 μm et de 0 à 40%. L'ajout de particules rigides réduit considérablement la cinétique de relaxation et la vitesse de fluage. De plus, la viscosité apparente évolue avec la déformation (durcissement cinématique), et une déformation critique, dépendant de la taille et de la fraction de particules, au-delà de laquelle l'écoulement semble être bloqué, a été introduite pour interpréter les résultats. Une étude préliminaire du comportement à vitesse de déformation imposée, pour des vitesses dans l'intervalle 10−5–10−1/s, met en évidence une dissymétrie des réponses en traction et en compression ainsi que la nature rhéo-fluidifiante de l'écoulement pour des vitesses supérieures à 10−3/s." @default.
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- W2056065275 date "1998-11-01" @default.
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- W2056065275 title "SiC particle reinforced oxynitride glass: stress relaxation, creep and strain-rate imposed experiments" @default.
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- W2056065275 doi "https://doi.org/10.1016/s1359-6454(98)00271-7" @default.
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