Letteratura scientifica selezionata sul tema "Déformations (mécanique) – Simulation, Méthodes de"
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Articoli di riviste sul tema "Déformations (mécanique) – Simulation, Méthodes de":
Massiéra, Michel, Bernard Boncompain e Joseph Merheb-Harb. "Interprétation des mesures inclinométriques durant la construction des remblais zonés des ouvrages de retenue du Complexe La Grande, phase I". Canadian Geotechnical Journal 36, n. 3 (25 ottobre 1999): 533–43. http://dx.doi.org/10.1139/t99-016.
Dalmora, André, Alexandre Imperiale, Sébastien Imperiale e Philippe Moireau. "Solveur numérique générique pour la modélisation de l'influence des contraintes mécaniques sur la propagation des ondes guidées pour les applications SHM". e-journal of nondestructive testing 28, n. 9 (settembre 2023). http://dx.doi.org/10.58286/28536.
Foucher, Fabrice, Sébastien Lonné, Philippe Dubois, Stéphane Leberre, Pierre Calmon, Michael Enright e Yasin Zaman. "Apports d’une cosimulation “END – Tolérance aux dommages” dans la réduction des risques de rupture". e-journal of nondestructive testing 28, n. 9 (settembre 2023). http://dx.doi.org/10.58286/28527.
Tesi sul tema "Déformations (mécanique) – Simulation, Méthodes de":
Germain, Jacques. "Contribution à l'étude du champ de déformations par granularité laser en élastoplasticité grandes déformations". Montpellier 2, 1995. http://www.theses.fr/1995MON20223.
Vanoverberghe, Laurent. "Anticipation des déformations lors du traitement thermique de pignons de boîte de vitesses". Paris, ENMP, 2008. http://pastel.archives-ouvertes.fr/pastel-00004771.
Two main strategies exist to manufacture gears, depending the respective order of finishing and heat treatment. Renault mainly uses a process where heat treatment follows finishing. Due to this, gear tooth distortion can not be corrected after quenching and thus has to be analysed in detail. Regardless of these two strategies, production development can be divided in two phases : process set up and series production. Each phase has its own problem. For the first, it will be useful to know beforehand the distortion during heat treament and other steps. We present some current phenomenological models of heat treatment process. A list of input parameters is done. Next, the use of numerical simulation is examined. A good qualitative correlation is observed between numerical and experimental results. Nevertheless, due to the complexity of input data and the determination of boundary conditions, another methodology is proposed structured around a data base containing the deformations of all gears manufactured in the factories. This methodology is implemented in a software and used at all Renault locations. Once this set up is finished, the part enters into series production. A second problem occurs : the nominal process deviation. For example, slight material changes, variations in machining conditions, modifications of heat treatment and so on can be responsible for these deviations. We mainly focuse here on dimensional deviations but this method could be applied to other ones. When production is stopped, these deviations have to be rapidly identified. This is why we propose here the methodology fundamentals to recognise the deviation origin from the part deformation. A numerical basis of all the deviations is created by applying a Proper Orthogonal Decomposition on numerical simulations. The projection of the real part deformation on this basis can help us to identify the deviation origin and so reduce time needed to analyse the problem
Malal, Nour-Eddine. "Modélisation et simulation numérique du comportement thermomécanique d'alliages métalliques". Montpellier 2, 1992. http://www.theses.fr/1992MON20115.
Desobry, David. "Génération de maillages hexaédriques pour des simulations de grandes déformations". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0163.
This thesis focuses on the development of hexahedral meshing methods suitable for large deformation simulations in non-linear mechanics. Domain parameterization methods based on frame fields are used to generate high-quality hexahedral meshes aligned with the domain boundaries. However, during large deformations, the mesh quality may degrade and potentially block the simulation. This thesis explores the idea of determining an optimal connectivity for the mesh elements while taking into account the anticipated deformations.In 2D, a complete pipeline is developed to tackle this challenge by combining previous work and scientific contributions. In 3D, contributions are made to approach this objective, particularly by controlling the boundary valences of hexahedral meshes produced from frame fields. The different parts of the thesis address the steps of large deformation numerical simulations, the advantages of global parameterization methods, the results of simulations on industrial 2D meshes, and contributions to improving the flexibility and robustness of the hexahedral meshing process.The ultimate goal is to reduce the time spent by engineers in generating an adequate mesh for a simulation by considering a priori information on the deformation to which the mesh and the object will be subjected
Schwartz, Jean-Marc. "Calcul rapide de forces et de déformations mécaniques non-linéaires et visco-élastiques pour la simulation de chirurgie". Thesis, Université Laval, 2003. http://www.theses.ulaval.ca/2003/21208/21208.pdf.
This work presents a method for the fast computation of mechanical deformations and forces for the simulation of surgical applications. Surgery simulation aims at providing physicians with tools allowing extensive training and precise planning of given interventions. The design of such simulation systems requires accurate geometrical and mechanical models of the organs of the human body, as well as fast computation algorithms suitable for real-time conditions. Most existing simulation systems use very simple mechanical models, based on the laws of linear elasticity. Numerous biomechanical results yet indicate that biological tissues exhibit much more complex behaviour, including important non-linear and visco-elastic effects. For this reason, we developed a method allowing the fast computation of mechanical deformations and forces including non-linear and visco-elastic effects. This method uses finite element theory and has been constructed as an extension of the so-called tensor-mass algorithm for linear elasticity. It consists in pre-computing a set of tensors depending on the geometrical and mechanical properties of each finite element, which are later combined in the simulation part itself. Our non-linear model does not assume any particular form of mechanical law, so that the proposed method is generic enough to be applied to a wide variety of behaviours and objects. Following the description of the algorithm, of its performances in terms of computation time, and of its numerical stability conditions, we show that this method allows to reproduce the mechanical behaviour of a biological soft tissue with good precision. As this project is part of a broader effort aiming more specifically at developing a simulation system for liver cryosurgery, we experimentally characterized the properties of liver in perforation by a biopsy needle. The non-linear and visco-elastic tensor-mass model constructed from experimental parameters succeeded in accurately reproducing the observed properties.
Gharzeddine, Fadi. "Formulation de la plasticité en grandes déformations et son implantation numérique". Compiègne, 1999. http://www.theses.fr/1999COMP1198.
Rivaux, Benjamin. "Simulation 3D éléments finis des macroségragations en peau induites par déformations thermomécaniques lors de la solidification d'alliages métalliques". Paris, ENMP, 2011. https://pastel.archives-ouvertes.fr/pastel-00637168.
Macrosegregations are chemical heterogeneities either in the skin or in the center of metallurgical products. These heterogeneities can generate serious troubles during downstream processing. Contrary to other studies which focus on central macrosegregation, our work aims to simulate the skin macrosegregation induced by thermomechanical deformations. Three steps are necessary to build the simulation. The first step consists on simulating macrosegregation at rigid and fixed solid, i. E. Without solid deformation. The second step, independent of the first one, aims to simulate the deformation of the solid without macrosegregation. The last step is a combination of the two previous one. All equations are solved by stabilized finite element methods. Each step refers to experiments in order to compare numerical and experimental results. The first step reproduces numerically the macrosegregation observed during Hebditch & Hunt experience. The numerical results are in good agreement with the experimental ones. The second step aims to simulate the deformation of a metallic liquid droplet during its solidification in contact with a copper chill, in microgravtiy. The numerical deformation obtained presents the same trend as the experimental one but in a lower magnitude. The last step is based on El-Bealy experience consisting of a pulsed water cooling of an ingot. The results show concentration variations but the simulation does'nt catch all experimental ones. Computations without macrosegregation point out that our simulations are less sensitive of deformation than the experiment. All simulations were run with binary alloys. Computations have also been run to simulate ternary alloy solidification but without solid deformation
Khelifa, Mourad. "Simulation numérique de l'endommagement en formage de structures minces". Troyes, 2004. http://www.theses.fr/2004TROY0013.
This work deals with the study of a advanced approach for the modelling and the numérical simulation of sheet metal forming processes in order to optimize their technological parameters with respect to the ductile damage occurence. The strong coupling between the anisotropic plastic behaviour with mixed kinematic and isotropic hardening and the ductile damage based on the thermodynamics of the irreversible processes with state variables is used. The theoretical and numerical aspects of the used formulation are described in details. The numerical integration of the model using and iterative implicite scheme combined with the radial return mapping and the reduction of the number of equations is discussed. The equilibrium equations are solved by means of a Static Implicit scheme (SI) or a Dynamic Explicit scheme (DE). An exerimental Database, essentially constitued of specimen tensile tests, is used to identify the model's paramters. In order to validate and to show the strength of the employed methodology to predict with accuracy the damaged zones, numerical simulations of simple and complex sheet metal forming processes are performed. A comparison with experimental results provided by CETIM and ENIM are then carried out. Another comparison between the present methodology and the inverse approach (URCA/GMMS) is also made on some cases
Liu, Xiao Jing. "Modélisation des grandes déformations élasto-plastiques de coques axisymétriques". Compiègne, 1992. http://www.theses.fr/1992COMPD513.
Achor, Zyad Khalid. "Étude du comportement élastoviscoplastique d'un polycarbonate à grande vitesse de déformation : simulation numérique du cisaillement adiabatique". Metz, 1999. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1999/Achor_Zyad.Khalid.SMZ9932.pdf.
Libri sul tema "Déformations (mécanique) – Simulation, Méthodes de":
K, Banerjee P., e Butterfield R, a cura di. Advanced geotechnical analyses. London: Elsevier, 1991.
NATO Advanced Research Workshop on Real-Time Integration Methods for Mechanical System Simulation (1989 Snowbird, Utah). Real-time integration methods for mechanical system simulation. Berlin: Springer-Verlag, 1991.
Largeeddy Simulation In Hydraulics. Taylor & Francis Ltd, 2013.
Rodi, Wolfgang, George Constantinescu e Thorsten Stoesser. Large-Eddy Simulation in Hydraulics. Taylor & Francis Group, 2013.
Rodi, Wolfgang, George Constantinescu e Thorsten Stoesser. Large-Eddy Simulation in Hydraulics. Taylor & Francis Group, 2020.
Rodi, Wolfgang, George Constantinescu e Thorsten Stoesser. Large-Eddy Simulation in Hydraulics. Taylor & Francis Group, 2013.
Rodi, Wolfgang, George Constantinescu e Thorsten Stoesser. Large-Eddy Simulation in Hydraulics. Taylor & Francis Group, 2013.
Rodi, Wolfgang. Large-Eddy Simulation in Hydraulics. Taylor & Francis Group, 2013.
Banerjee, P. k. Advanced Geotechnical Analyses: Developments in Soil Mechanics and Foundation Engineering - 4. Routledge, 1990.
Capitoli di libri sul tema "Déformations (mécanique) – Simulation, Méthodes de":
CHOULY, Franz, Patrick HILD e Yves RENARD. "Méthodes de lagrangien et de Nitsche pour le contact avec frottement". In Modélisation numérique en mécanique fortement non linéaire, 7–52. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9081.ch1.
BOURINET, Jean-Marc. "Estimation de probabilité d’événements rares". In Ingénierie mécanique en contexte incertain, 153–222. ISTE Group, 2021. http://dx.doi.org/10.51926/iste.9010.ch5.