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Theses

Simulation numérique des écoulements aux échelles microscopique et mésoscopique dans le procédé RTM

Abstract : In the Resin Transfer Molding (RTM) process, a thermoset resin is injected into a fibrous woven reinforcement. This resin polymerises to form a composite part. The goal is to model the flow at different scales: the tow scale (mesoscopic) and the fibre scale (microscopic), using numerical simulation. This thesis is divided in two parts. The first one is about permeability computation of a representative elementary volume (REV), applying an averaging method on pressure and velocity fields in the frame of the immersed domains method. At microscopic scale, permeability computation is validated using analytical laws. At mesoscopic scale, Stokes and Darcy equations, for the flows between and into yarns, have been implemented. The second part concerns the impregnation of the reinforcement at microscopic scale. It's includes modelling of the flow front movement between fibres with surface tension forces. We have implemented methods to take into account for the capillary phenomenon. We have implemented and validated methods to impose static contact angle and slip of the contact line. All developments are made using finite elements method with a velocity pressure formulation stabilised by a bubble function (MINI-element), and using the immersed domains method.
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Submitted on : Tuesday, February 7, 2012 - 3:41:06 PM
Last modification on : Thursday, September 24, 2020 - 5:22:54 PM
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  • HAL Id : pastel-00667411, version 1

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Grégory Puaux. Simulation numérique des écoulements aux échelles microscopique et mésoscopique dans le procédé RTM. Matériaux. École Nationale Supérieure des Mines de Paris, 2011. Français. ⟨NNT : 2011ENMP0055⟩. ⟨pastel-00667411⟩

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