Academic literature on the topic 'Verre – Fabrication – Simulation par ordinateur'
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Journal articles on the topic "Verre – Fabrication – Simulation par ordinateur"
Hernández-Alfaro, Federico. "Syndrome d’hyperdivergence faciale." L'Orthodontie Française 87, no. 4 (December 2016): 479–89. http://dx.doi.org/10.1051/orthodfr/2016037.
Full textDissertations / Theses on the topic "Verre – Fabrication – Simulation par ordinateur"
Cressin, Maxime. "Contribution au développement d'un modèle thermomécanique de mise en forme du verre par le procédé soufflé-soufflé incluant les effets radiatifs." Electronic Thesis or Diss., Valenciennes, Université Polytechnique Hauts-de-France, 2023. http://www.theses.fr/2023UPHF0023.
Full textThis thesis deals with the numerical modeling of glass forming by the blow and blow process, allowing the glass forming of glass in two blowing steps. The bibliographic study has shown that in order to efficiently simulate this process, it is necessary to take two important parameters into account: the thermal radiation of the glass and the thermal exchange between the glass and the tools. This thermal exchange is represented by the experimentally identified heat transfer coefficient hc. A 1D numerical thermal model taking the radiative effects into account has been developed to simulate the contact between a metal punch and a glass cylinder. This model was coupled with an inverse identification methodology to determine hc from experimental data. The influence of the glass temperature, of the thermocouple position and of the radiation on the identification of hc has been studied. The originality of this work concerns the inclusion of radiation in the identification of hc as well as the use of the Back Ray Tracing (BRT) method to solve the radiative transfer equation (RTE) in 2D axisymmetric. The code is coupled with the Abaqus/Standard software to take the radiation of the glass into account in the simulation of the forming process. Finally, a thermomechanical finite element model has been implemented in Abaqus/Standard in order to simulate the 2D axisymmetric blow and blow process of a standard glass bottle. A discussion is made on the contribution of the experimentally identified heat transfer coefficient and the radiation model on the formability of the bottle
Saumabere, Denis. "Modélisation numérique magnéto-thermique avec prise en compte du transfert radiatif dans les procédés d'élaboration des verres par induction en creuset froid." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0151.
Full textThe cold crucible induction process applied to glasses presents incomparable advantages related to the absence of contact between the molten glass, highly reactive material, and the crucible wall. The development of such methods is complex and delicate. Numerical modeling is a tool for analysis and extrapolation. Analysis of physical phenomena existing in the studied method shows a wide variation in physical properties of the glass depending on both temperature and composition, a strong interaction between the electromagnetic and thermal phenomena and the occurrence of a heat source further in the case of semi-transparent glasses due to radiative transfer. The thesis presents, after a bibliographic study on different methods to model the radiative transfer, a model of this phenomenon by a discrete method of based on finite elements. The coupling of electromagnetic and thermal phenomena taking into account radiative transfer is made. The strong interdependence of these three phenomena is modeled. In addition to each of the modeled phenomena the most appropriate numerical method is chosen. A validation of the model with thermal radiative transfer is done by comparison with examples found in the literature. A campaign on industrial prototype is carried out for a first validation of the model with thermo-magnetic radiation transfer
Béraud, Nicolas. "Fabrication assistée par ordinateur pour le procédé EBM." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI052/document.
Full textThe Electron Beam Melting (EBM) process allows to build metallic parts from powder. Thanks to the geometric and mechanical quality of the parts produced, the EBM process can be used to manufacture functional parts and not only prototypes. This process, with other additive metallic processes, make it possible to consider a transition from 3D printing to metallic additive manufacturing.The use of additive manufacturing in an industrial environment requires compliance with quality, cost and time criteria for the parts produced. The production of manufactured parts involves a series of numerical stages which is called the numerical chain. The numerical chain has a significant impact on the three criteria mentioned above. Thus, this thesis provides an answer to the following question:How Computer Aided Manufacturing can improve the quality, cost and time of the EBM manufacturing process?This problem is addressed through the following underlying question:What are the required characteristics for a Computer Aided Manufacturing system adapted to the EBM process?In order to answer this question, the current numerical chain is analyzed. Three main limitations are found:- the use of STL files format- the process cannot be optimized at different scales- the process cannot be simulatedTo solve these issues, a CAM environment is proposed. It allows the centralization of all numerical operations in a single environment. All supported formats can be used within this environment, such as native CAD file formats or STEP format. Software developments are done to prove the feasibility of such an environment.The CAM environment implementation reveals the crucial role of simulation in this system. It is therefore necessary to answer this second question:How to obtain an EBM process simulation allowing the development of parameters, virtually?Although EBM simulation is a recurrent subject in scientific literature, existing studies are based on the finite elements method but the calculation time needed is too important to be used in an CAM environment. Thus, an alternative type of simulation is created in this thesis: a simulation based on abacus. It is composed of a finite elements model, that allows heat maps generation for standards cases of heating and cooling. These heat maps are then transformed in abacus. The simulation algorithm based on abacus search the nearest abacus from the simulated situation in order to estimate the temperatures at the next time step.This simulation method was used to reduce the calculation time while keeping a sufficient precision to optimize process parameters.With the simulation based on abacus, a tool for the optimization of melting strategies is developed. This tool allows quality improvement for the produced parts through the calculation of melting strategies according to thermic criteria.To summarize, the main contributions of this work are:- the definition of requirements specifications of a powerful numerical chain for the EBM process- the development of a CAM environment adapted to the EBM process- the proposal of a fast simulation for the EBM process, based on abacus- the development of a tool for the optimization of melting strategies
Schryve, Mathieu. "Modèle d’adhésion cicatrisante et applications au contact verre/élastomère." Aix-Marseille 1, 2008. http://www.theses.fr/2008AIX11091.
Full textMany problems encountered in industry are concerned with interface evolutions, where contact, friction and adhesion are fundamental topics. This PhD thesis contributes to the development of a model involving adhesion and friction and allowing the healing of the adhesive bonds when the bodies are again pushed closer together after their separation. This model is called model of healing adhesion. In this work the applications concern specifically the contact glass/rubber. The formation of the the adhesion neck, jump-on and jump-off phenomena and the formation and the propagation of the Schallamach waves are investigated. A modelling of the adhesive contact is thus proposed, based on thermodynamic considerations and surface interactions concepts. In addition to the possible healing of the adhesives bonds, the originality of the model is that healing process and damage process are both related to the rate of the solicitation at the interface. According to the applications, the approch allows to consider two potential sources of dissipation. One is called surface dissipation and linked to the behaviour of the interface. The second is called bulk dissipation and linked to the behaviour of the bodies. The dynamic formulation is done within the framework of the non-smooth mechanic. Implementations of appropriate numerical methods and simulations are done in LMGC90 (Montpellier - Marseille). The model is tested with Benchmark and validated with the simulation of a glass/rubber experiment
Krichen, Abdelkader. "Simulation numérique et analyse expérimentale du comportement d'un contact verre/PMMA sous sollicitations de fretting." Ecully, Ecole centrale de Lyon, 1997. http://www.theses.fr/1997ECDL0021.
Full textNguyen, Hoang Quan. "Modélisation et simulation du remplissage de moules verriers : "Prise en compte du transfert radiatif"." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL054N/document.
Full textThe aim of this study is to propose an adapted model for the simulation of mould filling that must be a compromise solution between computational time and results accuracy. The double difficulty is to take into account the filling phenomenon that is a complex problem due to the presence of free boundaries and to the Glass specificities: viscosity that is highly thermal dependant and high melting temperature that requires taking into account radiation effects. Chapter I is devoted to the melting Glass flow. The numerical libraries Aquilon/Thétis, adapted for solving such type of problems and the thermal coupling between Air/Glass/Walls, has been used. (V.O.F method for front tracking, Augmented Lagrangian/Vector Projection methods for solving Pressure/Velocity coupling). For radiative aspect, different approaches are proposed: equivalent radiative conductivity (Chapter II), direct explicit method for validation (Chapter III) and spherical harmonics method or PN method (Chapter IV). In the Chapter V, the selected PN method is validated through simple cases and is then applied in other cases with convective coupling in complex geometries including semi-transparent inclusions (1D, 2D and 3D, 2D axi-symmetric and non grey medium). A P1 modified version is presented. The results are close to those given by P3 method but with reduced computational time. The main interest of this model is that it can be easily implemented in existing numerical codes: a single stationary second order partial differential equation to solve in 3D
Cobilici, Toma Cristina Gabriela. "Conception des engrenages face : simulation de la fabrication et du fonctionnement." Lyon, INSA, 1997. http://www.theses.fr/1997ISAL0067.
Full textThe principle of the face gear drives is known since along time : a cylindrical pinion drives a face wheel, the axis of rotation are intersecting or non-intersecting with an off-set, the angle axis can be 90°_Today, in the aeronautical applications, the principal advantage of this mechanism is the translation possibility of the cylindrical pinion without blocking the system. Consequently, the problem consists ta define precisely the real geometry of these drives and moreover to simulate the kinematic meshing to know the influence of the defining parameters. A bibliographical study of the definition and the simulation of these drives, has permitted to choose a set of numerical methods more capable to investigate the variations of the manufacturing parameters. The generation principles of the tooth surfaces remaining the same, the numerical simulation has permitted to define the general tooth profile. Then, the trajectories of the pinion shaper approached with the help of Cubic Splines Normalised, has permitted to study in details two phenomena: pointing and undercutting. Then, the meshing simulation of the numerical tooth geometry outcome from generation, has permitted to define the contact path. The numerical simulation of the meshing has also permitted to obtain the transmission error and the contact ratio. • After qualifying the numerical results with the literature's results, a study of the parameter influence has been realized (the pinion-shaper geometry, pressure angle, mounting position of the driving pinion). The principal conclusion can be briefly resumed in the following manner, the kinematic error is very few modified when small variations of mounting position occurs, even how the contact path are translated. The face gears drives should thus replace the bevel spiral-gears classically used
Lovas, Laszlo Rigal Jean-François Marialigeti Janos. "Etude des relations entre le comportement et la fabrication des synchronisateurs des boîtes de vitesses manuelles." Villeurbanne : Doc'INSA, 2005. http://docinsa.insa-lyon.fr/these/pont.php?id=lovas.
Full textBoudiba, Mahfoud. "Contribution à la réalisation d'un environnement général pour la simulation statique des procédés." Paris 13, 1996. http://www.theses.fr/1996PA132035.
Full textCicco, Ange de. "Modélisation informatique des conditions de fabrication du fromage corse afin d’établir le processus d’affinage pour obtenir un produit donné." Corte, 2005. http://www.theses.fr/2005CORTA001.
Full textBooks on the topic "Verre – Fabrication – Simulation par ordinateur"
Nielsen, C. V. Modeling of Thermo-Electro-Mechanical Manufacturing Processes: Applications in Metal Forming and Resistance Welding. London: Springer London, 2013.
Find full textSimulation of Industrial Systems: Discrete Event Simulation Using Excel/VBA. AUERBACH, 2007.
Find full textZhang, W., C. V. Nielsen, and L. M. Alves. Modeling of Thermo-Electro-Mechanical Manufacturing Processes: Applications in Metal Forming and Resistance Welding. Springer, 2012.
Find full textModeling of Thermo-Electro-Mechanical Manufacturing Processes: Applications in Metal Forming and Resistance Welding. Springer, 2012.
Find full textConference papers on the topic "Verre – Fabrication – Simulation par ordinateur"
Elmoutawakkil, N., S. Bouzoubaa, S. Bellemkhannate, and I. Benyahya. "Flux de travail du guidage tridimensionnel en chirurgie orale." In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206602005.
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