Assemblages : des matériaux à la structure : Analyse d'un mode de vieillissement dans un assemblage céramique/métal

Analysis of an ageing mode in a metal/ceramic assembly. During their manufacturing process, residual stresses are generated in the brittle part of ceramic/metal assemblies. Consequently cracks are initiated and can be arrested, so that the use of a probabilistic treatment based on a weakest link hypothesis is not possible. A probabilistic micro-cracking model is proposed to describe such arrest. Moreover, an extension of this model gives access to the reliability of such assemblies under static fatigue. An identification methodology of the different parameters is proposed. The approach is then used to predict the lifetime of an industrial component.