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Статті в журналах з теми "Déformation 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.
Повний текст джерелаGuézou, Jean-Claude, Thierry Baudin, Monica Ceretti, Marie-Hélène Mathon, Jean-Michel Sprauel, and Richard Penelle. "Étude des déformations élastiques résiduelles dans les quartzites." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 328, no. 11 (June 1999): 733–38. http://dx.doi.org/10.1016/s1251-8050(99)80164-5.
Повний текст джерелаAsserin, 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.
Повний текст джерелаBorgeaud and Chevalley. "Circular External Fixator for the Treatment of Diaphyseal Pseudarthrosis." Swiss Surgery 7, no. 2 (April 1, 2001): 61–67. http://dx.doi.org/10.1024/1023-9332.7.2.61.
Повний текст джерелаFrançois, 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.
Повний текст джерелаDe Bie, A., P. Louis, and J. M. Cognet. "Évaluation de la déformation antérieure résiduelle dans la prise en charge arthroscopique des pseudarthroses du scaphoïde." Hand Surgery and Rehabilitation 38, no. 6 (December 2019): 400. http://dx.doi.org/10.1016/j.hansur.2019.10.025.
Повний текст джерелаLetouzé, N., R. Brenner, J. L. Béchade, O. Castelnau, M. H. Mathon, and B. Bacroix. "Analyse par diffraction des neutrons des déformations résiduelles dans un alliage de zirconium après un chargement thermomécanique." Journal de Physique IV (Proceedings) 12, no. 6 (July 2002): 125–36. http://dx.doi.org/10.1051/jp4:20020220.
Повний текст джерелаFournier, M., B. Chanson, B. Thibaut, and D. Guitard. "Mesures des déformations résiduelles de croissance à la surface des arbres, en relation avec leur morphologie. Observations sur différentes espèces." Annales des Sciences Forestières 51, no. 3 (1994): 249–66. http://dx.doi.org/10.1051/forest:19940305.
Повний текст джерелаTouati, 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.
Повний текст джерелаDe Bie, Anaïs, Pascal Louis, and Jean Michel Cognet. "Évaluation de la déformation antérieure résiduelle dans la prise en charge arthroscopique des pseudarthroses du scaphoïde." Revue de Chirurgie Orthopédique et Traumatologique, October 2022. http://dx.doi.org/10.1016/j.rcot.2022.04.011.
Повний текст джерелаДисертації з теми "Déformation résiduelles"
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.
Повний текст джерелаKombate, N'Yimanne. "Modélisation numérique et optimisation des micro et nano connecteurs twist-pin." Thesis, Reims, 2018. http://www.theses.fr/2018REIMS027.
Повний текст джерелаThis 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
Taro, Mandikizinoyou. "Modélisation et simulation des procédés de mise en compression des surfaces à très grandes vitesses de déformation par méthode semi-analytique." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0105/document.
Повний текст джерелаThe failure of the mechanical parts is very often initiated by a surface defects. Consequently, the generation of compressive residual stresses on mechanical parts by introducing a heterogeneous plastic strain improves the resistance to fatigue and increases the lifetime of the parts. Among the processes making it possible to introduce residual stresses into the parts, the laser shock peening is more interesting for several reasons. On the one hand, it makes it possible to produce pressures on the surface of material of about 1 to 6 going GPa over short pulse times from 3 to 30 nanoseconds. In addition, he gives the opportunity of introducing residual stresses of compression on a certain depth while preserving the initial state of the treated part. The numerical simulation becomes necessary to determine the best physical phenomena involved. Thus, the semi-analytical method offers a lot of advantages, in particular the simplicity of the models and the computation times saving. This method was never extended to the dynamic problems. In this thesis the semi-analytical method was extended to the dynamic problems and the model implemented is applied for the simulation of the Laser process of shock
Mammadi, Younes. "Métrologie optique à petite échelle sous Microscope Électronique à Balayage : mesures de champs cinématiques en présence de discontinuités, par couplage FIB-MEB-CIN." Electronic Thesis or Diss., Poitiers, 2020. http://www.theses.fr/2020POIT2288.
Повний текст джерелаThis work is divided into three main parts. Initially, in order to order to carry out our studies at smaller scales such as micrometric scale, we must not only use a more complex means of observation, for example, scanning electron microscope "MEB-FEG" to obtain images usable in metrology optical, but also have to mark (speckle) on these scales. More recently, digital image correlation is the most widely used kinematic field measurement technique to study the mechanical behavior of materials and structures over an area of interest ranging from the meter scale to the millimeter one. This can be obtained by using a dual-focused ion beam technique. Furthermore, we have adopted a scientific approach by first developing an artificial speckle, with an engraving depth of the order of 100 nanometers. We also relied on statistical tools such as the range of gray levels, autocorrelation, the number of passes and the variation of magnification, which were necessary to validate the marking and to generate better results.In the second part, we coupled the DIC by utilizing the scanning electron microscope and the focused ion beam as the labelling techniques. In order to build a controlled and reliable metrological solution to observe and quantify the movements and deformations of matter at these scales. Several tests have been carried out on two metals ; Steel 304l and Inconel 718, toensure the repeatability and reproducibility of the procedure. In these tests, we proposed to calculate the horizontal and vertical displacements as well as the error related to these displacements.We demonstrate the same approach on the deformation fields. Different results have been obtained depending on the variation of the standard deviation found in the acquired data making it possible to quantify measurement errors as well as repeatability and drift over time.The last part of the proposed work is about the adaptation of measurement methods to the particular mechanisms of deformation at different scales, such as the location of fractures and damage. To study mechanical behavior and taking into account local fractures, we extract the deformations of a fractured material using a displacement field measurement method. The proposed approach consists of extracting the residual deformations of the first local gradients of H-DIC, the least disturbed by the fractures. Various tests have been carried out to assess the validity of this proposed new approach. An application to study the mechanical behavior of a metallic composite (Al / ω -Al-Cu-Fe) is proposed. Particular exploitation of all the fields lies in the good separation of the deformation fields and the cracked part. A discussion on the comparison between a conventional DIC analysis and its extension is presented on the zones without and with fractures
Panicaud, Benoît. "Contraintes « de croissance » et cinétiques d'oxydation dans des couches d'oxydes thermiques de Fer et de Nickel ;Etude in-situ par Diffraction des Rayons X et modélisation." Phd thesis, Université de La Rochelle, 2004. http://tel.archives-ouvertes.fr/tel-00169180.
Повний текст джерелаBlaizot, Jérôme. "Etude de l'influence des procédés de fabrication sur les propriétés mécaniques des alliages de nickel." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI024/document.
Повний текст джерелаMechanical behavior of nickel alloy 690 (NY690) is characterized from 25°C to 1100°C and for a strain rate ranging from 10-4 to 5×10-3s-1. The effects of chromium carbides and grain size (50-150 µm) on the tensile properties of NY690, were studied at 25°C and 750°C. Chromium carbides have negligible influence on the yield stress and on the strain hardening whereas the grain size slightly decreases the yield stress and the hardening rate at room temperature. The grain size has little influence on the strain-hardening but increases the steady-state stress. The dislocation density is the major microstructural parameter governing the mechanical behavior of the alloy for the studied experimental conditions. The Kocks-Mecking-Estrin formalism is adapted to a wide range of temperature and strain rate to predict the mechanical behavior
Berchi, Tarek. "Comportement micromécanique des alliages de zirconium en grandes déformations." Nantes, 2006. http://www.theses.fr/2006NANT2067.
Повний текст джерелаZirconium and its alloys are hexagonal close packed materials which present high plastic anisotropy and a variety of active deformation modes. As a consequence of these properties, second-order strains (and stresses) are generated during a plastic forming process between the grains having different crystallographic orientation. The mechanical behaviour of these alloys has been studied in the large strain framework for two cases: cold rolled Zy-4 plates and cold pilgering M5 zirconium alloy cladding tubes. Using X-ray diffraction technique, we have determined the residual stresses and crystallographic texture evolutions for different total strains. The elastoplastic self-consistent model was used to predict the mechanical state at the different scales. This model was developed to large deformations. A new formulation of the crystal plasticity has been proposed. The influence and the role of elastoplastic anisotropy have also been studied and explained in this work. A good agreement has been found between experimental and predicted crystallographic textures. The contribution and the magnitude of the first as well as the second-order residual stresses have been correctly evaluated from the measured strain. The prismatic slip is the most active deformation mode in these alloys at large strains
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.
Повний текст джерелаNitriding 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.
Повний текст джерелаDans 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
Lu, Jian. "Mesure de la distribution des contraintes résiduelles par la méthode du trou incrémentale." Compiègne, 1986. http://www.theses.fr/1986COMPD045.
Повний текст джерелаТези доповідей конференцій з теми "Déformation 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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