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Optimisation et modélisation du procédé RTM

Abstract : The aim of this work is to obtain a tool of modeling which constitutes today a necessity to control the R.T.M. process. This tools needs the prediction of macroscopic parameters caracterizing the reinforcement. A faithful representation of the reinforcement at the microscopic scale by an unit cell is the key of our study.We develop a method to initialized a characteristic function, making possible to accurately determine the interfaces between resin and reinforcements. This method has the particularity to be used with periodic or random structure. 3D flow simulation of resin int the pores between fibers permit to obtain permeability value of the represented structure. The computation is carried out on the whole domain represent by an unit cell and results of permeability is obtained by homogeneisation.A similar step was developed to study thermal phenomena in porous media. The local resolution of the heat flux in an unit cell containing a representation amount of fibers gives the equivalent thermal conductivity, firstly with no flow, and secondly by coupling thermal phenomena with the resin's flow, which generated heat fluctuations at the microscopic scale. This phenomena is important and modify largely results.
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https://pastel.archives-ouvertes.fr/tel-00266940
Contributor : Magalie Prudon <>
Submitted on : Wednesday, March 26, 2008 - 9:33:05 AM
Last modification on : Wednesday, October 14, 2020 - 4:02:46 AM
Long-term archiving on: : Thursday, May 20, 2010 - 10:29:35 PM

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  • HAL Id : tel-00266940, version 1

Citation

Richard Fournier. Optimisation et modélisation du procédé RTM. Mécanique [physics.med-ph]. École Nationale Supérieure des Mines de Paris, 2003. Français. ⟨NNT : 2003ENMP1174⟩. ⟨tel-00266940⟩

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