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Développement d'un modèle thermomécanique axisymétrique en milieu semi-transparent avec transfert radiatif : application au fluage et à la trempe des verres

Abstract : Most of glass products on the market come from a high-temperature forming operation, followed by a controlled cooling phase to remove (annealed glass) or generate (tempered glass) residual stresses. Since the mechanical behaviour of the glass is highly thermo-dependent, temperature control is a determining factor for the success of the manufacturing process. During numerical simulations, for this semi-transparent medium, heat exchanges by conduction and radiation have to be considered. In this work, the resolution of the ETR (radiative transfer Equation) is carried out using the "P1 method" and the "Back Ray tracing" (BRT). The two developed codes were validated by the comparative study with the temperature and residual stresses data from the literature on cooling in the thickness of the glass subject to various conditions in natural and forced convection. An experimentation which consists in cooling a glass disk on a metal support was developed in order to compare the temperatures and stresses generated by the testing and by the modelling resulting from the thermomechanical coupling with the two codes P1 and BRT. In a more original way, the BRT method was extended to revolving geometries. A first approach was to study the creep of a glass gob and to analyze the influence of the choice of the ETR's resolution model on the temperatures and geometries during the forming.
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Submitted on : Monday, December 17, 2018 - 3:27:06 PM
Last modification on : Wednesday, October 14, 2020 - 3:46:34 AM
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  • HAL Id : tel-01957797, version 1

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Kossiga Agboka. Développement d'un modèle thermomécanique axisymétrique en milieu semi-transparent avec transfert radiatif : application au fluage et à la trempe des verres. Mécanique des matériaux [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambresis, 2018. Français. ⟨NNT : 2018VALE0025⟩. ⟨tel-01957797⟩

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