MAZERAT, Stephane; PAILLER, Rene

doi:10.1016/j.ijfatigue.2020.106072

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MAZERAT, Stephane
Laboratoire des Composites Thermostructuraux [LCTS]

PAILLER, Rene
Laboratoire des Composites Thermostructuraux [LCTS]

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International Journal of Fatigue. 2021, vol. 145, p. 106072

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Multiple attempts have been devoted to interpret and predict the time to failure variability experienced on SiC bundles by slow-crack-growth. External discrete phenomena such as fiber sticking or load sharing are usually pointed. These approaches were reviewed and compared to extensive datasets on 6 fiber types, showing their insufficiency to cover the full scattering range. An original theory was hence evaluated: in addition to filament strength distribution, ruled by weakest link theory and therefore narrowly scattered, a bias on tow section and thus on applied stress, was introduced. Consistent results were obtained through a Monte-Carlo algorithm integrating these stochastic parameters.< Leer menos

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SiC fiber

Lifetime

Static fatigue

Nicalon

Tyranno

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Static fatigue of SiC-based multifilament tows at intermediate temperature: The time to failure variability

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