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Academic literature on the topic 'Coulée continue – Modèles mathématiques'
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Dissertations / Theses on the topic "Coulée continue – Modèles mathématiques"
M'Hamdi, Mohammed. "Modélisation de la solidification en coulée continue de l'acier." Vandoeuvre-les-Nancy, INPL, 1999. http://www.theses.fr/1999INPL102N.
Full textNguyen, Dung-Hanh. "Prédiction de la fissuration à chaud par la modélisation de la coulée semi-continue d'un lingot d'aluminium 5182." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28231/28231.pdf.
Full textBedel, Marie. "Étude de la formation des structures de solidification et des macroségrégations en coulée semi-continue d'aluminium." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0013/document.
Full textDuring solidification of metallic alloy, heterogeneities of solute composition and microstructure size appear. Mathematical models are valuable tools in the understanding and the control of the formation of these heterogeneities, which are incompatible with industrial requirements. Worldwide, SOLID is the only solidification model that simultaneously accounts for inoculation, the growth and motion of grains, natural convection and solidification shrinkage. The aim of this thesis is to improve the modelling of the coupling of nucleation and grain growth in this model. The solute diffusion, which controls the grain growth, is modelled by a diffusion length that takes into account both the motion of the solid-liquid interface and the convection of the liquid. At the microscopic scale, a third phase is added in order to improve the prediction of the growth of grains, particularly of the development of their morphology. The model can quantitatively predict the competition between the nucleation on inoculant particles and the grain growth at the microscopic scale. The model is applied to solidification of a static ingot and to direct chill casting in order to study the inoculation-growth coupling at the macroscopic scale. At this scale, the transport of the grains, of inoculant particles and of solute are all considered and are fully coupled. Comparisons of the model predictions to experimental measurements show the fundamental role of the transport of inoculants and of grains in the formation of the heterogeneities. The consideration of the development of dendritic grain morphologies considerably influences the predictions, even when their final morphology is globular
Benameur, Fouad. "Modélisation thermo-mécanique de la coulée sous pression en fonderie." Compiègne, 1996. http://www.theses.fr/1996COMPD885.
Full textLabzae, Allal. "Modèle de calcul des déformations viscoplastiques des brames dans la coulée de l'acier." Metz, 1988. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1988/Labzae.Allal.SMZ8824.pdf.
Full textThe calculations are based on the equation of Norton-Hoff for viscoplasticity and on different variants of this equation
Poublan, Hélène. "Reconnaissance automatique de signaux à évolution continue." Toulouse, INPT, 1991. http://www.theses.fr/1991INPT097H.
Full textMadec, Yoann. "Modélisation markovienne discrète et continue d'un processus autocorrélé : application au suivi de patients VIH positifs." Paris 5, 2001. http://www.theses.fr/2001PA055005.
Full textPeyronne, Clément. "Modélisation mathématique et résolution automatique de conflits par algorithmes génétiques et par optimisation locale continue." Phd thesis, Université Paul Sabatier - Toulouse III, 2012. http://tel.archives-ouvertes.fr/tel-00855296.
Full textGrange, Françoise. "Modélisation et simulation numérique de l'initiation et de la propagation d'un front d'ionisation dans une décharge continue en champ inhomogène/." Pau, 1997. http://www.theses.fr/1997PAUU3021.
Full textZitoune, Redouane. "Analyse des conditions d'usinage lors du perçage de structures composites fibres longues en carbone-époxy." Toulouse 3, 2004. http://www.theses.fr/2004TOU30182.
Full textThe drilling of composite structures long fibres in carbon/epoxy is accompanied by damages which are indexed according to their place of appearance. We distinguish three zones: at the entry of the hole - which corresponds to the separation of the top ply of the laminate, at the wall of the hole - with wrenching of fibres and the resin degradation, and at the exit of the hole - with the separation of the last ply. The zones of the wall and hole exit are the place of the major defects which harm the lifetime of bolted or riveted assemblies. Within the framework of this work we are interested in the analysis of the wall and exit hole defects. To analysis the wall defect, a simplified study is proposed. It consists in a numerical and experimental study of the orthogonal cutting of unidirectional laminates. The angle (q) between the fibres and the cutting speed direction (Vc) is respectively 0ʿ, +45ʿ, 90ʿ and -45ʿ. For the analysis of the defect at the hole exit, an experimental and numerical study on two types of materials in carbon/epoxy long fibres is carried out