Academic literature on the topic 'Modélisation de champ de phase'
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Journal articles on the topic "Modélisation de champ de phase"
Adam, Matthieu, and Georges-Henry Laffont. "Une approche dialectique de la ville en train de se faire : confrontation des représentations des concepteurs et des habitants de l’écoquartier de Bottière-Chénaie." Nouvelles perspectives en sciences sociales 10, no. 1 (February 4, 2015): 193–235. http://dx.doi.org/10.7202/1028440ar.
Full textGoria, Stéphane, and Philippe Hardy. "Le formateur et son public dans le cadre de l’élaboration d’une simulation de type wargame sur plateau." Board Game Studies Journal 13, no. 1 (October 1, 2019): 21–65. http://dx.doi.org/10.2478/bgs-2019-0003.
Full textVautier, Claude. "Cette étrange pliure à partir de laquelle rien n’est plus pareil. La question de la contingence en sciences sociales : l’événement." Articles hors thème 13, no. 2 (September 5, 2018): 265–91. http://dx.doi.org/10.7202/1051117ar.
Full textKom, C. H., and Y. Brunet. "Modélisation du champ magnétique d'un propulseur M.H.D. annulaire." Journal de Physique III 5, no. 1 (January 1995): 91–102. http://dx.doi.org/10.1051/jp3:1995112.
Full textBresson, J., R. Barriol, and J. P. Longuemard. "Antenne acoustique multi-éléments à focalisation. Modélisation du champ acoustique." Revue de Physique Appliquée 22, no. 10 (1987): 1177–84. http://dx.doi.org/10.1051/rphysap:0198700220100117700.
Full textRao, Sathya, and Learry Gagné. "Prolégomènes à une sociologie du théâtre francophone en milieu minoritaire : le cas du champ théâtral franco-albertain des années 1980-1990." Francophonies d'Amérique, no. 44-45 (February 5, 2019): 87–108. http://dx.doi.org/10.7202/1055905ar.
Full textBalbi, J. H., N. Balbi, P. Orenga, and G. Simonnot. "Modélisation du champ de capteurs de la centrale solaire de vignola." Revue de Physique Appliquée 21, no. 2 (1986): 169–80. http://dx.doi.org/10.1051/rphysap:01986002102016900.
Full textVogel, Alexandre, Badaoui Elmabsout, and Daniel Gintz. "Modélisation du champ des vitesses de l'urine dans un bolus urétéral." Comptes Rendus Mécanique 332, no. 9 (September 2004): 737–42. http://dx.doi.org/10.1016/j.crme.2004.03.017.
Full textGodts, P., D. Depreeuw, E. Constant, and J. Zimmermann. "Méthode générale de modélisation du transistor à effet de champ à hétérojonction." Revue de Physique Appliquée 24, no. 2 (1989): 151–70. http://dx.doi.org/10.1051/rphysap:01989002402015100.
Full textMargolinas, Claire. "Essai de généalogie en didactique des mathématiques." Swiss Journal of Educational Research 27, no. 3 (December 1, 2005): 343–60. http://dx.doi.org/10.24452/sjer.27.3.4709.
Full textDissertations / Theses on the topic "Modélisation de champ de phase"
Geslin, P. A. "Contribution à la modélisation champ de phase des dislocations." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2013. http://tel.archives-ouvertes.fr/tel-01009892.
Full textCrouzil, Thomas. "Modélisation de structure dynamique dans un champ optique." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0043/document.
Full textOptical trapping appears now, since a few decades, as a major theme at the intersection of variousdisciplines. Since the results of Ashkin, many works were made in the trapping and the guidance of physical objects (particles, molecules, bacteria, etc.) of any sizes. The latter will characterize then, in front of the wavelength, the optical domain in which we shall take place (Rayleigh, Mie, Geometrical Optics).Our work thus concerns the study of the properties of periodic linear chains of droplets (oil), placed in water, and submitted to two counter-propagating horizontal laser beams of gaussian profile. We show that it is possible to establish a spatial order of a set of large drops (in front of the wavelength) in a periodic structure. The originality of such a system lies in the fact that the light can then be refocused by the set of periodically spaced drops. This periodicity may thus, in some cases, confer on the beam a periodic refocusing within the network. This first study, in static limit, allows us to identify the conditions of coupling modes associated with drop channels. In particular, we characterize the presence of Bloch modes where the beam propagates with similar frequency to that of the network. This leads us to note that these modal conditions are submitt to the gaussian phase parameter "Thêta" (Gouy phase). Thus, although structured at a widely higher scale, we highlight theoretically similar properties to that of the photonic crystals, conferred by the periodicity of the chains of drops. This allows us, consequently, to demonstrate the existence of bandgaps, leading us to define a set of guiding/not-guiding modes of this chain. This static study, thereafter, is extended from a dynamic point of view by taking into account the effect of the optical forces on the drops. We show that it is possible to optically trap such drops on stable equilibrium states. Beyond of which we highlight, through a parametric study, the existence of periodic or pseudo-periodic oscillating modes.Finally, we take into account the phenomena of collisions by coalescence, involving a reorganization of the distributions of optical fields which can result in new configurations of trapping
Mellenthin, Jesper. "Modélisation de la solidification de matériaux polycristallins par la méthode du champ de phase." Palaiseau, Ecole polytechnique, 2007. http://www.theses.fr/2007EPXX0036.
Full textViardin, Alexandre. "Modélisation par champ de phases de la croissance de la ferrite allotriomorphe dans les aciers Fe-C-Mn." Thesis, Vandoeuvre-les-Nancy, INPL, 2010. http://www.theses.fr/2010INPL014N/document.
Full textThe growth of allotriomorphic ferrite plays a major role in the formation of martensite bands in Dual-Phase steels. We have thus developed a phase field model to study the ferritic growth in different ternary Fe-C-X alloys, incorporating two necessary features. First, we have paid a particular attention to recover the different growth regimes due to the huge difference between the diffusion rates of Cand X substitutional species. Our calculations have exhibited a transition from fast paraequilibrium to slow orthoequilibrium in good agreement with experimental measurements in the literature. Second, austenite grain boundaries have been included in the model because they can conterbalance the manganese segregation bands, as shown in our calculations. Indeed, our results show that the bands can be broken bythe wetting of ferrite along the austenite grain boundaries, provided that the segregation is below a threshold value, and provided that the grain boundary energies are sufficiently high
Cottura, Maeva. "Modélisation du champ de phase du couplage entre évolution microstucturale et propriétés mécaniques." Paris 6, 2013. http://www.theses.fr/2013PA066031.
Full textSolid state phase transformations in alloys produce a large variety of microstructures at the mesoscale. In the Phase Field framework, the influence of the mechanical driving forces i. E. Elastic and plastic, on microstructure evolution is analyzed. A major achievement of this work is the consideration, within a continuous modeling, of the consequences of the confinement of plasticity during microstructure evolution. First, it has been achieved by coupling a Phase Field Model to an isotropic strain gradient viscoplasticity model coming from generalized continuum mechanics. In a second step, the description of plasticity has been improved using a crystalline viscoplasticity-dislocations density based model. The model is applied to study microstructure evolution in Ni-based superalloys, more precisely, rafting during creep loading. Both models account for the change in mechanical behavior of the γ phase when the width of the γ channel evolves. However, for the [100] creep, the consequences of this phenomenon on the morphological evolution are moderate. Finally, a Phase Field Model has been developed to study the growth of acicular precipitates such as the ones observed in Ti-based alloys, characterized by Widmanstätten structures. We have shown that a strong elastic anisotropy can explain the stationary growth regime observed during isothermal aging
Laghmach, Rabia. "Modélisation de la cristallisation des élastomères sous sollicitation mécanique par champ de phase." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0061/document.
Full textNatural rubber NR and more generally elastomer presents unique physical properties that are very important for many engineering applications. Strain induced crystallization of elastomer presents a major interest because it improves considerably the mechanical properties. In fact, the presence of crystallites within the amorphous phase in a polymer network induces a strengthening of this material, giving NR a self-reinforcement character. In this thesis, we develop a mesoscopic model to describe the crystallization of elastomers under strain. In this context, we present a kinetic model using a new physical approach: a phase field model. This model combines the crystallization thermodynamics with the local stress field. The thermodynamic description of the phase transition is based on a Gibbs free energy functional F which contains all energy contributions of the system: the bulk contributions (enthalpy and entropy) and surface tension. To understand the experimental observation of nanometer size crystalites, an explicit account of the topological constraints induced by both entanglements and/or crosslinks is necessary. We investigated two limiting mechanisms, a kinetic limitation of the growth, and an energetic limitation. Based on both the kinetic and the energetic approaches, we have systematically studied the influence of topological constraints on the growth process. We have shown that the growth process is affected by the accumulation of elastic stress at the interface. The kinetic model predicts the existence of instabilities during the growth. These instabilities induce a heterogeneous dynamical growth which leads to the formation of dendrite like structures. On the contrary, the energetic approach predicts an exponential increase of the surface tension during the growth that limits the size of the crystallites very efficiently. In the last part we investigated elastomer crystallization under cyclic deformation. To this end, we coupled the previous energetic model with the nucleation process. Finally the simulation data are compared with experimental measurements
Mellenthin, Jesper. "Modélisation de la croissance de matériaux polycristallins par la méthode du champ de phase." Phd thesis, Ecole Polytechnique X, 2007. http://pastel.archives-ouvertes.fr/pastel-00003136.
Full textLouchez, Marc-Antoine. "Modélisation par champ de phase et atomique des interfaces hétérophases : application aux hydrures de zirconium." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10059/document.
Full textThe goal of this work was to contribute to a better understanding of the complex mechanisms underpinning the formation and evolution of hydrides in α zirconium and its alloys. In this context, multi-scale approaches combining atomic and phase-field simulations were employed to address the structural and energetic properties of heterophase α|hydrides interfaces. A peculiar attention was focused on the γ-ZrH hydride due to its controversed stability and to its supposed role one many sequences of precipitation. In particular, the study was concentrated on the basal and prismatic interfaces complemented by a meticulous study of the habit planes. An original methodology, transferable to other systems and based on the microelasticity theory combined with ab initio calculations, was proposed to estimate the energies related to these interfaces. The results show a strong anisotropy hitherto neglected in the literature. Due to the semi-coherent nature of prismatic interfaces, a correct evaluation of its energy was proven to be difficult. Thus, an alternative approach, grounded in a phase-field formalism and able to describe the core structure of inherent dislocations in prismatic interfaces, has been suggested. This approach turned out useful to estimate the interfacial stability of various systems as well as to predict the coherency loss of a growing seed. It has been showed that the coherent ζ-Zr2H hydride could constitute a good precursor of γ-hydride. Finally, the application of the microelasticity theory to α|hydrides interfaces has clearly showed a preference for πI pyramidal habit planes where a significant effect of hydrogen content in the hydride has also been observed
Gmati, Hela. "Modélisation par champ de phase de la rupture des matériaux solides élastiques et élasto-viscoplastiques." Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE010.
Full textThe Phase-Field Method (PFM), which has been designed for interfacial problems, provides an attractive framework for the modelling of fracture. The present work aims at developing some constitutive models within the framework of the PFM to model fracture in homogeneous and polycrystalline materials. For this purpose, two different situations have been examined. For the first situation, which is typical of brittle fracture, the development of damage is driven by the accumulation of elastic strain energy. The second situation is the one where damage is controlled by the development of plastic strains, which is quite common for ductile or fatigue fracture.The phase-field model for brittle fracture uses a scalar damage variable to represent the progressive degradation of mechanical resistance. The spatial gradient of the damage variable, which is treated as an additional external state variable, serves regularization purposes and allows considering the surface energy associated with cracks. The deviatoric/spherical decomposition of elastic strain energy is used to consider closure effects. Some material parameters have been introduced to control the impact of deviatoric and spherical contributions on the development of damage. Also, the proposed strategy is adapted to any class of material symmetry. Numerical implementation is undertaken via the finite element method, where nodal degrees of freedom are the displacement and the damage variable. For illustration purpose, the numerical simulations are carried out under both static and dynamic loading conditions.An extension of the above model to plasticity-driven fracture in polycrystalline materials is also proposed. The framework of crystal plasticity has been used for the construction of constitutive relations. To consider the role of plastic strains on the development of damage, the proposed strategy uses the coupling between damage and hardening. The consequence is that the driving force for damage contains some contributions from isotropic and kinematic hardening variables. According to the numerical results, the important features of ductile and fatigue fracture are correctly reproduced
Lebbad, Hocine. "Modélisation de la croissance des structures de Widmanstätten par la méthode des champs de phase." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS573.
Full textHe complex rearrangement of the phase domains in a metallic alloy, called microstructure, strongly impacts its mechanical properties. To optimize them, it is therefore important to understand the formation and evolution of the microstructures. The present work is devoted to a specific type of microstructures, called Widmanstätten. These acicular structures are observed in many metallic alloys (FeC, CuZn ...). Their growth, driven by the diffusion of alloying elements, occurs at constant velocity, in isothermal conditions. Yet, several aspects of this growth remain poorly understood, which justifies this study. Using phase-field models, we first show that the anisotropy of the elastic energy plays a key role on the growth, in both 2D and 3D. We observe that the tip radius of curvature does not depend on a dynamical process but relies on the competition between interfacial and elastic energy. Then, we illustrate the ability of our model to correctly describe the size of the tip. We have then developed two models to take into account two different mechanisms of relaxation by plastic deformation: misfit dislocations and plastic activity in the matrix. We have observed that plasticity does not change the singular growth at constant velocity but yet modifies the value of the growth velocity and the tip radius of curvature. Finally, we have developed a formalism at a thinner scale which is able to describe step nucleation and growth, which are often observed in Widmanstätten structures. Preliminary results, for a non-conserved field, are presented here
Book chapters on the topic "Modélisation de champ de phase"
Bisnath, Sunil B., and Richard B. Langley. "CHAMP Orbit Determination with GPS Phase-Connected Precise Point Positioning." In First CHAMP Mission Results for Gravity, Magnetic and Atmospheric Studies, 59–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-38366-6_9.
Full text"11 Théories des champs o4 : champ à N composantes." In Transitions de phase et groupe de renormalisation, 287–306. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0150-3-013.
Full text"11 Théories des champs o4 : champ à N composantes." In Transitions de phase et groupe de renormalisation, 287–306. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0150-3.c013.
Full text"Chapitre 16. Transitions de phase : approximation de champ moyen." In Groupes de symétrie en physique, 149–66. EDP Sciences, 2022. http://dx.doi.org/10.1051/978-2-7598-2765-7.c018.
Full text"6. Cyclage de phase versus gradients de champ pulsés." In RMN : la boîte à outils, 57–66. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2425-0-009.
Full text"6. Cyclage de phase versus gradients de champ pulsés." In RMN : la boîte à outils, 57–66. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-2425-0.c009.
Full textFAGES, François, and Franck MOLINA. "La cellule, un calculateur analogique chimique." In Approches symboliques de la modélisation et de l’analyse des systèmes biologiques, 255–74. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9029.ch7.
Full textATTO, Abdourrahmane M., Aluísio PINHEIRO, Guillaume GINOLHAC, and Pedro MORETTIN. "Analyse d’ordre fractionnaire et prédiction de trajectoire de cyclones." In Détection de changements et analyse des séries temporelles d’images 1, 159–82. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9056.ch6.
Full textDIMITROV, Boyan. "Distributions et processus aléatoires liés aux modèles de files d’attente et de fiabilité." In Théorie des files d’attente 2, 91–147. ISTE Group, 2021. http://dx.doi.org/10.51926/iste.9004.ch3.
Full textRAKOTOMOLALA, Quentin. "Modélisation des effets d’explosions sous-marines sur structures immergées." In Interactions fluide-structure, 305–42. ISTE Group, 2022. http://dx.doi.org/10.51926/iste.9078.ch10.
Full textConference papers on the topic "Modélisation de champ de phase"
Berger, David H., John D. Monnier, Rafael Millan-Gabet, Theo A. ten Brummelaar, Philip Muirhead, Ettore Pedretti, and Nathalie Thureau. "CHARA Michigan phase-tracker (CHAMP): design and fabrication." In SPIE Astronomical Telescopes + Instrumentation, edited by John D. Monnier, Markus Schöller, and William C. Danchi. SPIE, 2006. http://dx.doi.org/10.1117/12.672168.
Full textBerger, David H., John D. Monnier, Rafael Millan-Gabet, Theo A. ten Brummelaar, Matthew Anderson, Jennifer L. Blum, Timothy Blasius, Ettore Pedretti, and Nathalie Thureau. "CHARA Michigan phase-tracker (CHAMP): a preliminary performance report." In SPIE Astronomical Telescopes + Instrumentation. SPIE, 2008. http://dx.doi.org/10.1117/12.790168.
Full textCatros, S. "A quoi servent les Bio-Imprimantes 3D ?" In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206601012.
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