Academic literature on the topic 'Contraintes et déformations résiduelles'
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Journal articles on the topic "Contraintes et déformations résiduelles"
Ahdad, F., and M. Desvignes. "Contraintes résiduelles et déformations plastiques." Matériaux & Techniques 84, no. 5-6 (1996): 46–50. http://dx.doi.org/10.1051/mattech/199684050046.
Full textAsserin, O., D. Ayrault, Ph Gilles, S. Courtin, and V. Robin. "Prédiction des contraintes et déformations résiduelles par simulation numérique du soudage." Revue Générale Nucléaire, no. 2 (March 2013): 48–58. http://dx.doi.org/10.1051/rgn/20132048.
Full textTouati, A., J. M. Roelandt, F. Armanet, M. Lambertin, and G. Béranger. "Un modèle pour le calcul des déformations et des contraintes résiduelles dans les couches d'oxyde lors de chargements thermiques à régime variable." Le Journal de Physique IV 03, no. C9 (December 1993): C9–1023—C9–1029. http://dx.doi.org/10.1051/jp4:19939105.
Full textMontagne, Alex, Véronique Vitry, Luiza Bonin, Muhammad Zeeshan Mughal, Marco Sebastiani, Edoardo Bemporad, Alain Iost, and Mariana Henriette Staia. "Contraintes résiduelles et comportement mécanique de revêtements nickel-bore." Matériaux & Techniques 107, no. 2 (2019): 205. http://dx.doi.org/10.1051/mattech/2019016.
Full textFrançois, Manuel. "Des déformations déterminées par diffraction aux contraintes résiduelles, un passage moins simple qu’il n’y paraît.." Revue de Métallurgie 100, no. 12 (December 2003): 1135–36. http://dx.doi.org/10.1051/metal/20031202.
Full textGentil, B., M. Desvignes, and L. Castex. "Analyse des surfaces grenaillées : fissuration, rugosité et contraintes résiduelles." Matériaux & Techniques 75, no. 12 (1987): 493–97. http://dx.doi.org/10.1051/mattech/198775120493.
Full textDenis, S. "Prévision des contraintes résiduelles induites par traitement thermique et thermochimique." Revue de Métallurgie 94, no. 2 (February 1997): 157–76. http://dx.doi.org/10.1051/metal/199794020157.
Full textGognau, D., H. Blehaut, J. Dürr, S. Hariri, L. Khouchaf, and P. Flahaut. "Caractérisation de l'état de surface et des contraintes résiduelles engendrées par meulage." Journal de Physique IV (Proceedings) 12, no. 6 (July 2002): 137–46. http://dx.doi.org/10.1051/jp4:20020221.
Full textPelletier, H., J. Krier, and M. Bach. "Relation entre les mesures de nanodureté et la présence de contraintes résiduelles." Matériaux & Techniques 92, no. 3-4 (2004): 75–81. http://dx.doi.org/10.1051/mattech:2004022.
Full textWebster, P. J. "Analyse des contraintes résiduelles et de la texture dans les matériaux : applications industrielles." Journal de Physique IV (Proceedings) 103 (February 2003): 305–19. http://dx.doi.org/10.1051/jp4:200300012.
Full textDissertations / Theses on the topic "Contraintes et déformations résiduelles"
Depouhon, Pierre. "Contribution à la modélisation des déformations et des contraintes résiduelles induites par la nitruration des pièces mécaniques." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4015.
Full textNitriding of steel is a thermo-chemical treatment well known to improve the mechanical properties of the material. It is based on the diffusion of nitrogen into the surface of treated parts. Complex phenomena are then involved and generate residual stresses and distortions. Depending on their geometry, parts can be distorted up to several millimeters and be subject to significant internal tensile-compression stresses. The aim of this work is to provide a multi-physical model of the nitriding in order to predict, for any part geometry, their residual stresses and distortions after treatment. These informations, precious for engineers, will allow to optimize the design and the manufacturing processes of nitrided parts
Ghfiri, Rachid. "Etude du retard à l'amorçage et à la propagation d'une fissure de fatigue après perçage d'un trou avec et sans expansion." Lille 1, 2000. http://www.theses.fr/2000LIL10146.
Full textDans ce travail, trois degres d'expansion ont ete analyses (de = 1. 7%, 3. 4% et 4. 3%). L'expansion du trou ameliore considerablement la duree de vie qui augmente avec le degre d'expansion. Par ailleurs, l'effet du chargement sur le nombre de cycles a l'amorcage est etudie. Ce dernier augmente quand l'amplitude du facteur d'intensite de contrainte diminue. L'analyse des facies de rupture par microscope electronique a balayage montre une zone comprimee au bord du trou et une absence des microfissures. Par contre, loin de cette zone des microfissures orientees dans tous les sens ont ete observees. Une modelisation numerique par elements finis est realisee afin de quantifier les contraintes residuelles de compression ainsi que la zone affectee par l'expansion au bord du trou
Lê, Minh-Bao. "Propagation de fissure par fatigue en présence d'une pré-déformation et de contraintes résiduelles." Palaiseau, Ecole polytechnique, 2013. http://www.theses.fr/2013EPXX0032.
Full textVeaux, Michaël. "Étude expérimentale et prévisions par le calcul des cinétiques de transformation de phases, des contraintes résiduelles et des déformations lors de la transformation bainitique." Vandoeuvre-les-Nancy, INPL, 2003. http://www.theses.fr/2003INPL050N.
Full textA fully bainitic microstructure is required for some mechanical steel parts. The simulation of the dedicated heat treatment process is necessary to optimise the parts in terms of final microstructures (i. E. Mechanical properties), residual stresses and distortions. The first part of the work deals with the experimental study of the bainitic transformation kinetics, the thermomechanical behaviour of the formed microstructures and the effect of an applied stress on the bainitic transformation (transformation plasticity and kinetic effect) for a middle alloyed steel. Different models for the prediction of phase transformation kinetics and thermomechanical behaviour (macroscopic and microscopic cnes) have been used at the scale of specimen without gradients. The. Experimental validations at that scale have allowed to move to the scale of massive specimen (with high gradients) for whlch the dlfferent coupllngs between thermal, metallurglcal and mechanlcal phenomena have been taken into account in finite element simulations. The influence of phase transformations on the development of internai stresses and deformations during cooling have been analysed in details. Moreover, quenching experiments with in-situ temperature measurements have allowed to validate the numerical simulations. It has been pointed out that it is necessary to take into account the effect of internai stresses on bainitic transformation kinetics to predict final microstructure and hardness distributions
Krier, Joël. "Influences des hétérogénéité élastoplastiques sur les contraintes du deuxième ordre dans les polycristaux métalliques mono- et biphasés : calculs autocohérents - mesures par diffraction X." Metz, 1993. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1993/Krier.Joel.SMZ9305.pdf.
Full textThe aim of this work is to study influences of elastoplastic heterogeneities on microscopic stress and strain fields in one - and two phased polycrystals. Local stresses and strains are calculated owing to the self consistant scheme of cinematic integral equation linking local and global strains. Elastic strain calculations allow to show second order stresses and to simulate perfectly X-ray diffraction experiments on isotropic materials and materials with crystallographic and morphologic texture. Parallel calculations and diffraction experiments after tensile plastic déformations show that the model is able to predict residual stresses and their evolution during plastic straining, and their influences on X-ray diffraction experiments. The simple model based on the problem of an inclusion in a matrix allows to explain qualitatively the splitting of X-ray diffraction curves after surface machining in multiphased materials, and to link it to the morphology of the constituents for global homogeneous strains
Roland, Thierry. "Génération de nanostructures par traitement de nanocritallisation superficielle SMAT sur matériaux métalliques et étude des propriétés mécaniques associées." Troyes, 2006. http://www.theses.fr/2006TROY0011.
Full textThis work aims to study a recently developed process for the generation of a nanocrystalline surface layer on metallic materials. Based on a concept, close to which of ultrasonic shot peening, this process, known as “surface mechanical attrition treatment (SMAT)” is based on a gain refinement mechanism down to the nanometer scale obtained by severe plastic deformations. In this way, the material to be treated is impacted by shot, in general, perfectly spherical balls, launch with random directions at the surface of the sample. Consequently, a nanocrystalline surface layer with a thickness of several tens of micrometers is formed. Because of the very small grain size, nanocrystalline materials are structurally characterized by a large volume fraction of grain boundaries, which may significantly after their physical, chemical and mechanical properties in comparison with conventional coarse-grained polycrystalline materials and which have grain sizes usually in the range of 10-300um. Thus, it may be suggested that the transformation of the surface layer of metals into surface nanocrystalline layer may enhance their overall properties
Stoehr, Michèle. "Epitaxie par MOVPE de ZnSe sur des substrats semiconducteurs et études des contraintes dans ces hétérostructures." Montpellier 2, 1991. http://www.theses.fr/1991MON20301.
Full textChevre, Pascal. "Modélisation magnéto-thermique, métallurgique et mécanique et validation expérimentale de traitement par induction des engrenages à dentures hélicoïdales." Paris, ENSAM, 2000. http://www.theses.fr/2000ENAM0009.
Full textThis work is a part of developpemnt of a new gear box by Research Departement of RENAULT. The aim of this work is to replace a thermo chemical by an induction contour harding. To have a perfect control of the process, the different physical phenomena were modeled. This report falls in 3 parts : the 1er chapter is dedicated to the state of the art of induction contour hardening and more particularly of its simulation. An analysis of physical phenomena is performed. In chapters 2 and 3, the equations and models needed are presented. The difficuty to obtain accurate measures is outlined. Chapters 4 and 5 are the heart of this report. The 2D and 3D simulation allowed the study of the process parameters influence and parameters sensibilities on the results. The difficulty to obtain a correct treatment of the gear because of the helical geometry of teeth is shown. The duration cycle, the strains and stress state in the part were calculated. First experimental results were compared to numerical predictions. In conclusion, numericla simulation has shown its usefulness in analys and understanding of physical phenomena, and appears as an efficient tool to design and optimise the induction heat treatment of helical gears
Kombate, N'Yimanne. "Modélisation numérique et optimisation des micro et nano connecteurs twist-pin." Thesis, Reims, 2018. http://www.theses.fr/2018REIMS027.
Full textThis PhD thesis is part of the FUI "MicroConnect" project, carried out by Axon'Cable Group, whose main objective is the design and development of an automated forming process to manufacture a new type of innovative and high-performance twist-pin connectors. These connectors are used in many fields such as aeronautical electronics, avionics, military systems because of their strength and their hability to be used in very demanding environments... An essential element of the connectors is the contact, as it makes the transfer of the electric current from a system to another. Each connector can have tens or even hundreds.Due to the sequence of the processes used to produce these contacts, their initial properties can be modified. The use of numerical simulation is therefore essential to master the influence of these processes on the final product. The approach adopted in this work consisted in modelling the different steps of the contact fabrication (bending, laser welding and crimping) on the Abaqus software in order to determine the residual stresses resulting from these operations. These models are validated by comparing them with experimental investigations carried out. Finally, an optimization of the crimping is done to highlight the geometrical configurations of the tools allowing the developed product to respond to the tearing tests provided by the validation standards
Xu, Chan. "Étude et simulation numérique d’un procédé de cuisson rapide pour l’élaboration de matériaux composites à matrice thermodurcissable." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14895/document.
Full textThe autoclave polymerization is the bottleneck of the production flux for largepublic parts, hence the speedy polymerization process emerges to improve the productionratio. The objective is to study the possibility of reducing the cycle time of polymerizationfor the production of thin composite laminates using a fast cure process out-of-autoclave.Specific or standard chemical and mechanical characterization tests had been designed inorder to capture the expected characteristics for the model simulation and validate thesimulation results. According to the values obtained, an analysis based on the finiteelement technique is developed to simulate the speedy curing process of epoxy resincomposite. The analysis relates the cure temperature to the thermal, chemical and physicalprocesses occurring in the thin composite part during cure. Included in the analysis are theeffects such as the heat generation due to exothermic chemical reactions. For a specifiedcure cycle, the model could be used to calculate the temperature distribution, the degree ofcure of the resin inside the composite part as well as predict the residual curing stressesand the strains of the cured composite parts.Keywords :
Book chapters on the topic "Contraintes et déformations résiduelles"
Laradi, N., S. Haddadi, and F. Kaoua. "Influence de la rotation des axes principaux des contraintes et/ou des déformations sur la rhéologie des sols et des matériaux routiers." In Geotechnics for Developing Africa, 459–66. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003211174-65.
Full textWierzbanowski, K., A. Baczmanski, P. Lipinski, C. Rey, O. Fandeur, and J. M. Sprauel. "7 Interprétation des contraintes résiduelles à l’aide de la simulation numérique." In Rayonnement synchrotron, rayons X et neutrons au service des matériaux, 379–476. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0863-2-010.
Full textWierzbanowski, K., A. Baczmanski, P. Lipinski, C. Rey, O. Fandeur, and J. M. Sprauel. "7 Interprétation des contraintes résiduelles à l’aide de la simulation numérique." In Rayonnement synchrotron, rayons X et neutrons au service des matériaux, 379–476. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-0863-2.c010.
Full textConference papers on the topic "Contraintes et déformations résiduelles"
Asserin, O., D. Ayrault, Ph Gilles, S. Courtin, and V. Robin. "Prédiction des contraintes et déformations résiduelles par simulation numérique du soudage." In Le soudage : maîtrise, simulation et contrôle. Les Ulis, France: EDP Sciences, 2012. http://dx.doi.org/10.1051/jtsfen/2012sou05.
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