Créé le : 13/09/2010 - Mis à jour le : 15/11/2012
Liquid composite molding processes generally involve injection of a polymeric resin in a fibrous preform previously placed in a closed mold. Resin kinetics largely depend on the temperature cycle applied and, as far as thick composites parts are concerned, they can greatly impact on the temperature profile, especially in the core of the part where high temperature range can be reached, affecting the part mechanical properties. Thermal analysis of the system is usually done at the macro-scale level. However, at micro level and because of resin flow across the fibrous preform, local thermal effects have to be considered. A heat dispersion coefficient for instance will account for the hydrodynamic effects so as to improve significantly the accuracy of the temperature profile prediction at steady state. To improve prediction of transient...