Image‐Based 2D Numerical Modeling of Oxide Formation in Self‐Healing CMCS

Dréan, Virginie; Perrot, Grégory; Couégnat, Guillaume; Ricchiuto, Mario; Vignoles, Gérard L.

doi:10.1002/9781118217542.ch11

Cited by 2 publications

(2 citation statements)

References 14 publications

(11 reference statements)

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“…Choosing a time step linked to gas diffusion t g would lead to extremely slow computations. In a first attempt, it had been chosen to consider the diffusion Equation (3) as steady, while the time integration would only rely on Equations (9)-(12) [33], but after the creation of a liquid domain (h g = 0), this was no longer possible. Therefore, here, the initial time step was set to the geometrical average of both time scales: ∆t = ∆t l ∆t g (24) and then, after the healing event occurred, the time step was set to ∆t l .…”

Section: Space and Time Discretizationmentioning

confidence: 99%

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

Perrot

Couégnat

Ricchiuto³

et al. 2019

Ceramics

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Self-healing, obtained by the oxidation of a glass-forming phase, is a crucial phenomenon to ensure the lifetime of new-generation refractory ceramic-matrix composites. 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 mini-composite. The presented model can work on a realistic image of the material section and is able to simulate the healing process and to quantify the exposure of the material to oxygen: a prerequisite for its lifetime prediction. Crack reopening events are handled satisfactorily, and healing under cyclic loading can be simulated. This paper describes and discusses a typical case in order to show the model capabilities.

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Section: Space and Time Discretizationmentioning

confidence: 99%

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

Perrot

Couégnat

Ricchiuto³

et al. 2019

Ceramics

View full text Add to dashboard Cite

show abstract

“…This motivates the development of enhanced models of oxidation progression in a complex architecture. Several directions are possible, for instance projection of the 3D system in a 1D model [12], or the production of 2D models placed in crack planes, currently under development [13]. These models are intended to incorporate in the long term all the morphological elements that can be extracted from tomographic scans.…”

Section: Oxidation Investigationsmentioning

confidence: 99%