Image-based Numerical Modeling of Self-Healing in a Ceramic-Matrix Minicomposite

Grégory Perrot (1) , Guillaume Couégnat (1) , Mario Ricchiuto (2) , Gérard Vignoles (1)

1 LCTS - Laboratoire des Composites Thermostructuraux
2 CARDAMOM - Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts

Self-healing is an important phenomenon in new-generation refractory ceramic-matrix composites, obtained by the oxidation of a glass-forming phase in the composite. The dynamics of oxygen diffusion, glass formation and flow are the basic ingredients of a self-healing model that has been developed here in 2D in a transverse crack of a minicomposite. The presented model can work on a realistic image of the material section and is able to simulate healing and quantify the exposure of the material to oxygen, a prerequisite for its lifetime prediction. Crack reopening events are handled satisfactorily, and secondary healing can be simulated. This papers describes and discusses a typical case in order to show the model potentialities.

Mots clés: Image-based modelling; Self-healing; Ceramic-matrix composites

Domaines: Modélisation et simulation; Matériaux; Mécanique des matériaux [physics.class-ph]

Grégory Perrot, Guillaume Couégnat, Mario Ricchiuto, Gérard Vignoles. Image-based Numerical Modeling of Self-Healing in a Ceramic-Matrix Minicomposite. Ceramics, 2019, 2 (2), pp.308-326. ⟨10.3390/ceramics2020026⟩. ⟨hal-02118786⟩