Probabilistic features of lifetime in fatigue. Influence of flows [Aspects probabilistes de la durée de vie en fatigue Influence des défauts]

cited By 0; International audience; The fracture of fibres dictates the fracture of composites reinforced by long fibres. The ceramic matrix composites that are made of a ceramic matrix reinforced by ceramic fibres, display features that are interesting to address lifetime issues. The flaws they contain have a random distribution, and act as stress concentrators. The resistances to failure display a statistical distribution. The effects of microstructural defects on lifetime are discussed in the present paper. A multi scale approach based on modelling of the damage modes in the matrix and the fibers is outlined. The models integrate facture probabilities owing to stochastic phenomena induced by the statistical distribution of microstructural flaws. © 2013 Lavoisier.