Letteratura scientifica selezionata sul tema "Métamatériaux – Simulation par ordinateur"
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Articoli di riviste sul tema "Métamatériaux – Simulation par ordinateur":
Meadeb, Jean, Gerard Chales, Patrice Burgevin, Philippe Ingels, Rene Pedrono, Jean-Michel Roger, Catherine Frangeul, Marie-Jo Pedrono e Pierre Lenoir. "Apprentissage du diagnostic médical par simulation sur ordinateur (AEDM)". Medical Informatics 11, n. 2 (gennaio 1986): 167–75. http://dx.doi.org/10.3109/14639238609001369.
Serhir, N., e C. Marche. "La simulation assistée par ordinateur dans le contrôle et l'utilisation optimale des ressources hydriques". Canadian Journal of Civil Engineering 19, n. 3 (1 giugno 1992): 432–40. http://dx.doi.org/10.1139/l92-052.
Charness, Neil. "Psychological Models of Aging: How, Who, and What? A Comment". Canadian Journal on Aging / La Revue canadienne du vieillissement 14, n. 1 (1995): 67–73. http://dx.doi.org/10.1017/s0714980800010503.
Camarero, R., L. Granger, C. Marche, M. Soulié e R. Tinawi. "L'intégration en conception assistée par ordinateur pour les projets pluridisciplinaires de génie civil". Canadian Journal of Civil Engineering 15, n. 6 (1 dicembre 1988): 990–1005. http://dx.doi.org/10.1139/l88-131.
Riopel, Martin. "Riopel, M. (2005). Conception et mises à l’essai d’un environnement d’apprentissage intégrant l’expérimentation assistée par ordinateur et la simulation assistée par ordinateur. Thèse de doctorat, Université de Montréal, Montréal". Revue des sciences de l'éducation 33, n. 1 (2007): 253. http://dx.doi.org/10.7202/016197ar.
Perez, Fabienne, e Jonathan Peterson. "10 ans de la revue @grh : une cartographie des publications en ressources humaines". @GRH N° 47, n. 2 (24 luglio 2023): 23–41. http://dx.doi.org/10.3917/grh.047.0023.
Toussaint, J., T. Habtemariam, D. Oryang e S. Wilson. "Développement d’un modèle de simulation informatique pour l’anaplasmose, notamment dans les Antilles". Revue d’élevage et de médecine vétérinaire des pays tropicaux 46, n. 1-2 (1 gennaio 1993): 47–48. http://dx.doi.org/10.19182/remvt.9396.
Thrasher, Craig L. "Corporate Team Training : A More Rational Organizational Development Method". Relations industrielles 27, n. 4 (12 aprile 2005): 655–62. http://dx.doi.org/10.7202/028331ar.
Hernández-Alfaro, Federico. "Syndrome d’hyperdivergence faciale". L'Orthodontie Française 87, n. 4 (dicembre 2016): 479–89. http://dx.doi.org/10.1051/orthodfr/2016037.
Fortin, J. P., R. Moussa, C. Bocquillon e J. P. Villeneuve. "Hydrotel, un modèle hydrologique distribué pouvant bénéficier des données fournies par la télédétection et les systèmes d'information géographique". Revue des sciences de l'eau 8, n. 1 (12 aprile 2005): 97–124. http://dx.doi.org/10.7202/705215ar.
Tesi sul tema "Métamatériaux – Simulation par ordinateur":
Efremov, Semen. "Croissance paramétrée et bruit procédural pour la conception de métamatériaux mécaniques". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0046.
With constant development of technologies, computational and manufacturing capabilities increase, production methods evolve, and new techniques appear. As a result, the need for new materials with tailored, optimized properties for different applications arises. Periodic composites with tailored microstructure topology, called cellular metamaterials are extensively studied in this context. These structures are known for their remarkable mechanical properties, including high strength, lower weight, and increased energy absorption. The use of these materials allows to achieve improved physical properties or specific functional features and provides economical gain and ecological benefit.This thesis is dedicated to the development and analysis of methods for computer-aided design of materials with tailored mechanical properties. The mechanical metamaterials were studied through two different approaches: modelling periodic structures through a parameterized growth model and procedural noise functions. To tackle the challenge of obtaining near-regular microstructures with progressively varying properties, I proposed and studied a cellular material spawned by a growth process. The growth is parameterized by a 3D star-shaped set at each lattice point, defining the geometry that will appear around it. Individual tiles may be computed and used in a periodic lattice, or a global structure may be produced under spatial gradations, changing the parametric star-shaped set at each lattice location. Beyond free spatial gradation, an important advantage of this approach is that elastic symmetries can be intrinsically enforced. It is shown in this work how shared symmetries between the lattice and the star-shaped set directly translate into symmetries of the periodic structures' elastic response. Thus, the approach enables restricting the symmetry of the elastic responses -- monoclinic, orthorhombic, trigonal, and so on -- while freely exploring a wide space of possible geometries and topologies. I provide a comprehensive study of the space of symmetries and broad combinations of growth process parameters. Furthermore, I demonstrate through numerical and experimental results the expected responses triggered by the obtained structures.The second contribution of this thesis is a novel procedural pattern synthesis technique. This approach exhibits desirable properties for modeling highly contrasted patterns, that are well suited to produce surface and microstructure details. This approach defines a stochastic smooth phase field –- a phasor noise –- that is then fed into a periodic function (e.g. a sine wave), producing an oscillating field with prescribed main frequencies and preserved contrast oscillations. I present in this thesis a mathematical model, that builds upon a reformulation of Gabor noise in terms of a phasor field that affords for a clear separation between local intensity and phase. In particular, I study the behavior of phasor noise in terms of its power spectrum. Hence, a comparative theoretical study of phasor noise was performed in order to gain understanding of links between its properties and parameters
Linot, Fabrice. "Apport des Surfaces à Haute Impédance à la conception d'antennes réseaux compactes et d'antennes réseaux à très large bande passante". Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00617270.
Djian, Francis. "Modélisation thermique des thermostats pour oscillateurs à quartz et applications". Besançon, 1991. http://www.theses.fr/1991BESA2021.
Béraud, Nicolas. "Fabrication assistée par ordinateur pour le procédé EBM". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI052/document.
The 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
Louin, Jean-Charles. "Effets d'hétérogénéités de teneur en carbone sur les cinétiques de transformations de phase et sur la genèse des contraintes internes lors du refroidissement d'aciers". Vandoeuvre-les-Nancy, INPL, 2003. http://www.theses.fr/2003INPL077N.
Heat treatment is a process that needs the control of both final microstructures and residual stresses and deformations. Numerical simulation is a useful tool for a better optimization of this process. The aim of our work was to contribute to the development of a numerical tool for the prediction of microstructures, stresses and strains during cooling of pieces that may contain chemical heterogeneities, particularly carbon content heterogeneities. Firstly, an existing model for the prediction of transformation kinetics in steels has been further developped in order to take into account the effects of the carbon content enrichment of austenite due to a partial ferritic transformation on the subsequent transformations. Coupled thermal, metallurgical, mechanical calculations have then been performed to study the effects of carbon content gradients on the microstructural evolutions and on the residual stresses development during cooling. Particularly, the possible effects of solidification macro and mesosegregations have been quantified in massive cylinders with sizes close to the size of an ingot. Secondly, experimental validations have been performed for homogeneous cylindrical specimen (40CrMnMo8 steel) and for a chemically heterogeneous specimen specifically designed for our study. The complete set of input data necessary for the simulations has been established from experimental characterizations of the steel. The role of chemical heterogeneity has been analysed through the experimental and calculated results. Finally, a good correlation has been obtained between measurements and calculation of the deformation during cooling of a 3D "croissant" shaped specimen
Sech, Nicolas Le. "Photocathodes à base de nanotubes de carbone sur substrats semi-conducteurs de type III-V. Application aux amplificateurs hyperfréquence". Palaiseau, Ecole polytechnique, 2010. http://pastel.archives-ouvertes.fr/docs/00/50/14/43/PDF/These_N_Le_Sech.pdf.
Fauchet, Gauthier. "Modélisation en deux points de la turbulence isotrope compressible et validation à l'aide de simulations numériques". Lyon 1, 1998. http://www.theses.fr/1998LYO10027.
Menezla, Rabea. "Réalisation d'un logiciel de résolution de l'équation de poisson à trois dimensions : Simulation numérique tridimensionnelle du claquage des composants à jonctions P-N". Ecully, Ecole centrale de Lyon, 1990. http://www.theses.fr/1990ECDL0027.
Joly, Cécile. "Simulations numériques d'un jet rond turbulent et de son interaction avec un tourbillon de sillage". Université de Marne-la-Vallée, 2002. http://www.theses.fr/2002MARN0147.
The general context of this study concerns the impact of contrails, these famous white plumes frequently observed in the aircraft wake, on the atmosphere. From an aerodynamic point of view, the formation of the contrails is characterised by the interaction between a turbulent jet and a wing-tip vortex. The aim of this thesis is to contribute to a better understanding of the thermal and dynamic phenomena involved in this flow. This work is based on the numerical resolution of the three-dimensional, unsteady and compressible Navier-Stokes and energy conservation equations. Two approaches are considered: the direct numerical simulation and the large eddy simulation. A temporal simulation of the transition to turbulence of a non-isothermal jet is performed without accounting for the vortex flow field. A the end of this simulation, a vortex model is superimposed on the jet flow field. The first part of this thesis describes the two approaches, the different subgrid models chosen for the large eddy simulations, and the numerical techniques employed. The second part is devoted to the jet flow simulation, and here the objective is to determine the subgrid model appropriated to this flow configuration. The third part is dedicated to the simulation of interaction between the jet and the vortex. Results are compared to experimental data. The simulations have demonstrated the development of large scale structures all around the vortex core. The temperature field concentrates in the large scale structures
Quatravaux, Thibault. "Évolution de la modélisation du procédé VAR : contribution à la description de la dispersion inclusionnaire dans le puits liquide et à la prévention de défauts de solidification". Vandoeuvre-les-Nancy, INPL, 2004. http://www.theses.fr/2004INPL037N.
This thesis deals with the modelling of Vacuum Arc Remelting process (VAR) using the numerical software SOLAR. The first aim of the study is a better description of several physical phenomena which occur during melting, in order to extend the application of the software to simulate the remelting of steel. The evolution in the modelling of transport phenomena in the secondary ingot is based on three major improvements: - lateral thermal transfer modelling, in order to take into account the formation of a gap between the ingot and the mould walls, a possible injection of a neutral gas, and the heating of water in the coolant circuit, according to its flow, - a better turbulence model, since the k-E model implemented previously in the numerical code was not accurate enough to correctly descri~ the flow of the liquid metal in the pool, - a new method to simulate the ingot growth, based on a cyclic operation of splitting and growth/migration of control volumes, which reproduces the continuous growth of the secondary ingot and allows for the refinement of the mesh close to the free surface. Finally, the improved model has been validated by comparison with experimental results provided from four remeltings carried out on full-scale furnaces. The second objective is the characterization of the quality of the manufactured products in terms of inclusion cleanliness and risk of freckles segregated channel generation. Ln order to describe the behaviour of inclusions in the liquid pool, a trajectory model, adapted to account for turbulent flows, was validated and then implemented in the code. Various particle behaviours were distinguished. A study on the risk of freckles generation led to the establishment of a criterion particularly weIl adapted to the process. A generalization of this criterion, suggested in this work, would allow the prediction of the probable orientation of such segregated channels
Libri sul tema "Métamatériaux – Simulation par ordinateur":
Trigeassou, J. Cl. Recherche de modèles expérimentaux assistée par ordinateur. Toulouse: Langage et informatique, 1988.
Riopel, Martin. Conception et mises à l'essai d'un environnement d'apprentissage intégrant l'expérimentation assistée par ordinateur et la simulation assistée par ordinateur. [Repentigny, QC]: Martin Riopel, 2005.
Chevrier, Jacques. L' ordinateur, outil d'apprentissage. Hull, Qué: Université du Québec à Hull, 1985.
Molloy, Michael K. Fundamentals of performance modeling. New York: Macmillan Pub. Co., 1989.
Neelamkavil, Francis. Computer simulation and modelling. Chichester [Sussex, England]: Wiley, 1987.
Treuil, Jean-Pierre. Modélisation et simulation à base d'agents: Exemples commentés, outils informatiques et questions théoriques. Paris: Dunod, 2008.
Willis, Jerry. Computer simulations: A source book to learning in an electronic environment. New York: Garland Pub., 1987.
Lapresté, Jean-Thieerry. Aide-mémoire MATLAB. Paris: Ellipses, 2002.
Chung, Christopher A. Simulation modeling handbook: A practical approach. Boca Raton: CRC Press, 2004.
Stabler, Timothy. PhysioEx 4.0 laboratory simulations in physiology. San Francisco: Benjamin/Cummings, 2003.
Atti di convegni sul tema "Métamatériaux – Simulation par ordinateur":
Elmoutawakkil, N., S. Bouzoubaa, S. Bellemkhannate e 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.