Authors:
Dr. Julien Sayet | Univ. Orléans, LaMé (EA7494, Univ. Orléans, Univ. Tours, INSA CVL) | France
Dr. Thomas Sayet | Univ. Orléans, LaMé (EA7494, Univ. Orléans, Univ. Tours, INSA CVL) | France
Most of the industrial applications are subjected to severe work conditions in terms of heat, chemistry, and mechanical constraints. Nowadays, the existence of a numerical tool accounting for all the physics that take place is a major challenge for many industrial processes like steel and glass production, welding, nuclear fusion, etc. Some fully coupled theories exist in the literature [1]. Rambert et al. [2] developed a numerical tool accounting for thermal, transport, and mechanics but without the chemical reactions.
The goal of this study is to implement a coupled numerical tool within the framework of an irreversible thermodynamic process for reactive porous multiphase materials using a user-defined element (UEL) subroutine. To validate the tool, an oxidation of a cylindrical shape SiC-based refractory castable under high temperature gradient is simulated in order to predict the swelling effects. The obtained results are in good agreement with SEM and macroscopic measurements [3]. Note that some parameters are estimated due to the lack of reliable experimental data under high temperatures.
REFERENCES
[1] Hu, S. and Shen, S. (2013) Non-equilibrium thermodynamics and variational principles for fully coupled thermal–mechanical–chemical processes. Acta Mechanica, 224, 2895–910.
[2] Rambert, G., & al. (2006) A modelling of the direct couplings between heat transfer, mass transport, chemical reactions and mechanical behaviour. Numerical implementation to explosive decompression. Composites Part A: Applied Science and Manufacturing, 37, 571–84.
[3] Merzouki, & al. (2014) Modelling of the swelling induced by oxidation in SiC-based refractory castables. Mechanics of Materials, 68, 253–66.