Letteratura scientifica selezionata sul tema "Glissement plastique"
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Articoli di riviste sul tema "Glissement plastique"
Pelard, Emmanuelle. "Le nomadisme du signe dans les « pseudographies » de Christian Dotremont et d’Henri Michaux". Cygne noir, n. 1 (26 luglio 2022): 36–52. http://dx.doi.org/10.7202/1090994ar.
Testo completoSnauwaert, Maïté. "À l’image de l’histoire : formalisation, cristallisation, circulation". Filer (Sophie Calle), n. 7 (10 agosto 2011): 17–48. http://dx.doi.org/10.7202/1005515ar.
Testo completoTesi sul tema "Glissement plastique"
Le, Lu Tuan. "Etude par essais in situ MEB et AFM sur monocristaux des mécanismes de glissement à température ambiante de la ferrite de pureté commerciale". Paris 13, 2013. https://tel.archives-ouvertes.fr/tel-01725850.
Testo completoKhalil, Walid. "Développement d'outils de dimensionnement d'applications en alliages à mémoire de forme à base Fer : prise en compte du couplage transformation de phase - glissement plastique". Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0021/document.
Testo completoThe Fe-based shape memory alloys (SMAs) present a specific thermomechanical behaviour compared with classical SMAs. In this PhD thesis, experimental thermomechanical tests were performed in order to study such behavior. The applied loading is a tension followed by a significant heating. The loading cycle is repeated at different constant temperatures and maximum stresses. The experimental results show a coupling between two non linear inelastic mechanisms: phase transformation and plasticity. The reverse transformation activated only during heating, the effect of plastic strain on the transformation one, were also analysed. Taking into account all these specificities, a finite element numerical tool adapted to Fe-based SMA structural analysis is proposed. It is based on a developed constitutive model which describes the effect of phase transformation, plastic sliding and their interactions on the thermomechanical behavior. Two scalar internal variables were considered to describe phase transformation and plastic sliding effects. This model was derived from an assumed expression of the Gibbs free energy taking into account, in addition to mechanical and chemical quantities, the non linear interaction quantities related to inter- and intra-granular incompatibilities. The numerical tool derived from the implicit resolution of the non linear partial derivative constitutive equations was implemented in the Abaqus finite element code via the UMAT subroutine. After verification tests for homogeneous and heterogeneous thermo-mechanical loadings, two examples of Fe-based SMA applications were studied. They correspond to Fe-based SMA tightening systems: a fish plates for crane rails and a ring for tubes connection
Lineau, Corinne. "Analyse expérimentale de la déformation plastique d'un polycristal d'acier. Comparaison avec les simulations de modèles polycristallins". Phd thesis, Ecole Nationale des Ponts et Chaussées, 1997. http://tel.archives-ouvertes.fr/tel-00529716.
Testo completoBeaude, Nicolas. "Etude théorique et expérimentale du comportement élasto-plastique et de la localisation de la déformation dans les monocristaux". Paris 13, 1988. http://www.theses.fr/1988PA132005.
Testo completoFnaiech, Mustapha. "Contribution a l'etude "in situ" du glissement et de la montee des dislocations dans un compose semiconducteur (3/5) : insb". Toulouse 3, 1987. http://www.theses.fr/1987TOU30070.
Testo completoTounsi, Bouchaïb. "Etude par microscopie en faisceau faible de la dissociation des dislocations dans Ni(3)Si : relation avec le comportement plastique". Poitiers, 1988. http://www.theses.fr/1988POIT2338.
Testo completoForget, Mathilde. "Laminage asymétrique de l'alliage de magnésium AZ31". Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00930193.
Testo completoGazo, Hanna Eddie. "Procédé de formage des composites à fibres longues et matrice thermoplastique : analyse expérimentale et numérique du glissement interpli". Ecole centrale de Nantes, 2011. http://www.theses.fr/2011ECDN0043.
Testo completoThe industrial problem of thermoforming of composites materials with long fibers and thermoplastic matrix is in the desire to control the forming process at high mechanical performance while ensuring a reasonable cost of manufacture. The process is a challenge cause it attemps fo form a material during its processing: heating, transfer to the press, pressing and cooling. Complex part forming reveals the occurence of detects such as "fiber buckling", porosity and migration of the resin. The simulation of the process is not yet as mature, even if software of draping or thermoforming begin to appear. The current codes are not suitable to use in distributed areas, while unfortunately this is the key point of the simulation. Moreover, as we expect, the calculation results depend very strongly on the friction "friction coeffecient", scalar parameter which is strongly varaible. The objective of this work is to obtain a better understanding of the thermoforming through the study of physical processes involved in the ply deformation. In fact, a good knowledge of the behavior and good determination of experimental parameters associated in the modeling lead to a better data for coding and therefoer a better simulation of the process
Ait, Saadi Bachir. "Configuration des dislocations dans l'acier z3 cnd 17-12 apres fatigue : correlation au comportement mecanique". Poitiers, 1988. http://www.theses.fr/1988POIT2259.
Testo completoManyo, Edem Yawo. "Modélisation avancée du contact pneu-chaussée pour l'étude des dégradations des chaussées en surface". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0034/document.
Testo completoThe recent appearance of new materials in road structures associated with surface layers thickness decreasing and the increasing of trucks loading and their passage frequency has led to new pathologies of degradation. In addition to the well-known rutting problems, top down cracking is now appearing as well as problems of decohesion at the interfaces. These new pathologies led to considerable expenditure on the entire network (around 15 billion euros per year), particularly in urbanized areas that are more prone to surface damage and do not make it possible to adequately estimate the lifetimes of the roadway, most often overestimated in current design methods. This doctoral work proposes a new approach of the tire-road contact allowing for better apprehend of the main and residual stresses in a bituminous pavement structure. Using a fast numerical tool based on a semi-analytical approach ("Semi-Analytical Methods" (SAM)), the precise geometry of the tire is integrated in order to obtain a real contact pressure distribution as well as surface shear on the pavement surface. Initially, an elastic tractive rolling contact model is implemented for simple theoretical cases and validated by analytical and numerical results from the literature.Then, this model is extended to take into account the elastoplastic behavior of the bodies in contact. This is compared to a numerical result based on the nite element method from the literature. The application for tire-pavement contact results, show a non-uniform distribution of stresses in the structure and mainly in the rst centimeters below the surface with much higher levels than can be predicted by current models that use a uniformly distributed load. The contact pressure is compared to the measurements made by a system called TekScan and the mechanical elds in sublayers are compared to those of Alizé-LCPC in the case of a simple structure. The surface shears are determined in the case of tractive rolling. An application is carried out on the modeling of surface pavement damage. Firstly, analyzes of the behavior of the surface pavement are carried out for a semi-innite semi-grit asphalt concrete layer supposed to be elastic, homogeneous under conditions of acceleration, braking and turning. For studies on top down cracking, principals deformations and directions are determined and analyzed. Then, the elastoplastic contact model is applied on a semi-innite asphalt agragate layer. Deformations and residuals stresses generated in the structure are determined for an analysis on the instability ruts. Once validated, these results will make it possible to more accurately estimate the residual life of pavements but also to understand and avoid surface or near surfacedegradation mechanisms