Mécanismes et modélisations de dégradation et décollement des interfaces de couches de chaussées

Abstract : Interface between bituminous layers is an important parameter for the pavement computational design.New pathologies in pavement structure require today rational methods taking into account theinterfaces behavior. Due to these concerns, the current study is based on a damage cohesive zonemodel (CZM) in mixed mode of the rough interfaces. The model was initially proposed by Allix-Ladevèze. This thesis presents a comprehensive interface modeling including delay effect, based ondamage energy release rate. The process of the present study is presented in three chapters. The firstchapter present the stat of art of interfaces. The second devoted to identify the parameters of theinterface model and material properties through advanced optical method as Digital Image Correlation(DIC) and (H-DIC). In the third chapter, a study of the influence of the elastic normal and tangentialstiffness and coupling parameters in the mixed mode on the debonding interfacial energy is presented.An analytical model provides relations between the interfaces stiffness, the coupling parameter of theCZM and the interfacial roughness. Then, a parametric numerical analysis is conducted to study theroughness effect on the interface constitutive law. Results show clearly the roughness influence in thiskind of structures. The damage behaviours predicted by the proposed model for pure mode I, puremode II and for mixed mode with taking into account of roughness are found in good agreement withexperimental results.
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Rahma Ktari. Mécanismes et modélisations de dégradation et décollement des interfaces de couches de chaussées. Génie civil. Université de Limoges, 2016. Français. ⟨NNT : 2016LIMO0090⟩. ⟨tel-01417551⟩

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