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Academic literature on the topic 'Coefficient de comportement'
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Journal articles on the topic "Coefficient de comportement"
Babacar Ndiaye, Mamadou, Ahmadou Diop, Seydou Faye, Youssou Traore, and Gregoire Sissoko. "ETUDE DUN PANNEAU PLAN A BASE DE TYPHA ET DARGILE EN REGIME TRANSITOIRE." International Journal of Advanced Research 8, no. 12 (December 31, 2020): 751–58. http://dx.doi.org/10.21474/ijar01/12207.
Full textBabacar Ndiaye, Mamadou, Ahmadou Diop, Seydou Faye, Youssou Traore, and Gregoire Sissoko. "ETUDE DUN PANNEAU PLAN A BASE DE TYPHA ET DARGILE EN REGIME TRANSITOIRE." International Journal of Advanced Research 8, no. 12 (December 31, 2020): 751–58. http://dx.doi.org/10.21474/ijar01/12207.
Full textNogning Kamta, P., D. Chicot, F. Roudet, M. Touzin, and G. Louis. "Fluage et relaxation par indentation d’aciers au chrome." Matériaux & Techniques 105, no. 1 (2017): 103. http://dx.doi.org/10.1051/mattech/2017027.
Full textMascaró Altimiras, Rosa. "N-Fidi, un outil validé de repérage de la négligence." Enfance 3, no. 3 (October 17, 2024): 255–73. http://dx.doi.org/10.3917/enf2.243.0255.
Full textKastner, Richard. "Conférence Coulomb prononcée le 13 juin 2018 : « Parois de soutènement ancrées ou butonnées : l’apport des retours d’expérience organisés »." Revue Française de Géotechnique, no. 155 (2018): 1. http://dx.doi.org/10.1051/geotech/2018007.
Full textErpicum, Sébastien, Michel Pirotton, Benoit Blancher, and Julien Vermeulen. "Influence de la géométrie du quadrant amont et comportement hydraulique sous forte charge des seuils profilés standards." La Houille Blanche, no. 1 (February 2019): 40–47. http://dx.doi.org/10.1051/lhb/2019006.
Full textSagna, Batoura, Mohamed Lemine Cheikh, Habiboula Lemrabott, Sega Gueye, Moustapha Thiame, and Gregoire Sissoko. "PHOTOPILE MONOFACIALE AU SILICIUM EN REGIME TRANSITOIRE : INFLUENCE DE LIRRADIATION SUR LA DENSITE DE PHOTOCOURANT ET LA CAPACITE." International Journal of Advanced Research 11, no. 12 (December 31, 2023): 234–49. http://dx.doi.org/10.21474/ijar01/17980.
Full textTrappey, Charles. "Une méta-analyse du choix du consommateur et de la publicité subliminale." Recherche et Applications en Marketing (French Edition) 12, no. 1 (March 1997): 89–98. http://dx.doi.org/10.1177/076737019701200105.
Full textDeauvieau, Jérôme. "Comparer les résultats d’un modèle logit dichotomique ou polytomique entre plusieurs groupes à partir des probabilités estimées." Bulletin of Sociological Methodology/Bulletin de Méthodologie Sociologique 142, no. 1 (April 2019): 7–31. http://dx.doi.org/10.1177/0759106319834657.
Full textSavadogo, O. "Comportement photoélectrochimique de ZnIn2S4(n) dans l'obscurité et sous éclairement en solution électrolytique aqueuse." Canadian Journal of Chemistry 70, no. 4 (April 1, 1992): 1098–104. http://dx.doi.org/10.1139/v92-145.
Full textDissertations / Theses on the topic "Coefficient de comportement"
Le, Thi Hong Hanh. "Distribution et comportement du polonium dans deux anciens sites miniers français." Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4028.
Full textPolonium-210 (210Po) is a naturally occurring radionuclide resulting from the decay of uranium-238. In addition to its natural presence, anthropogenic activities can lead to a local increase in the concentration of 210Po, in particular uranium mining. The aim of this study is to better understand the impact of human activities on the distribution and behaviour of 210Po in soils. To this end, two former French mining sites are examined. The first, called "Rophin", located in the Puy-de-Dôme region, was mined in the middle of the 20th century. The second one, not exploited, is located on the site called "les Granges du colonel" in the Mercantour National Park in the Alpes-Maritimes. This second site has never been exploited, but it was listed as a potential site in the 1960s. Soil samples were taken from the wetlands of both sites. The total 210Po activity in each sample was measured. The sequential extraction method was then applied to determine the geochemical distribution of 210Po in the soils studied. Most of the 210Po (more than 70%) is present in the residual fraction, soluble only in concentrated acids (HF, HNO3). This suggests low lability of polonium in the environment. Apart from the residual fraction, 210Po is mainly present in the carbonate-related fraction at pH 5. The impact of pH and bicarbonate content on the solid-liquid distribution coefficient of 210Po was also studied. The results showed that mining activities at Rophin promoted the exhalation of 222Rn and led to disequilibrium between 210Po and 238U
Idir, Achour. "Justification du coefficient de comportement sismique des structures en béton armé par des approches statiques équivalentes." Châtenay-Malabry, Ecole centrale de Paris, 1997. http://www.theses.fr/1997ECAP0508.
Full textAbdul, Baki Ali. "Analyse probabiliste du comportement de deux remblais sur versant instable." Lyon, INSA, 1992. http://www.theses.fr/1992ISAL0049.
Full textThe present work consists of a probabilistic analysis of two behaviour of two embankments A and B built on the moving s lop of the experimental site of Sallèdes. After a bibliographical analysis, this work contains two parts: - The first part suggests: gathering of all the boreholes made on t he site and the stocking or the data relating to them, statistical parameters (average, standard deviation, variance, variation coefficient, etc. ) of each of those properties and the signification levels of the normal and beta laws for the distribution of each variable as well as their logarithm and their inverse, study of the correlation between every two parameters beneath each embankment and on the whole site, along with the correlation between those parameters and the three axis x, y and z, study of the horizontal and vertical autocorrelation of the different proprieties. - The second part proposes : reviewal of the deterministic methods of stability calculation necessary to the development of the blocks methods and comparison of the results obtained by that method with those obtained by t he program "PETAL" concerning stability calculation, introduction of probabilistic analysis techniques into the stability calculation of the blocks method using the numerical integration methods, analysis or the stability of two embankments A and B using the probabilistic calculation program. Comparison of results with those obtained from deterministic calculations
Ait, Ali Yahia Lyes. "Etude expérimentale de l’influence de la morphologie des agrégats de suies sur leur comportement thermophorétique." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1081.
Full textThe main objective of this study is to improve the knowledge about the morphological influence of fractal aggregates on their thermophoretic behavior. For this purpose, an original tri thermal device aimed to capture this kind of particles by thermophoresis deposition was developed. This device is composed of three concentric tubes where particles flows through an annular space between the inner and outer tubes with imposed temperatures, the inner one is cooled and the outer is heated. Particles will deposit by thermophoresis on the cold wall of the inner tube. This device is based on the so called penetration method, where the deposition rate on a cold wall is obtained by particles concentrations measurements upstream and downstream of the test section. A deposition model developed in this study allowed us to determine the thermophoretic diffusion coefficient Kth. We validated the tri thermal device using monodispersed spherical latex particles and also mono and polydispersed spherical oil particles distributions. Indeed, a good agreement was found between our experimental determination of the thermophoretic diffusion coefficient and the theoretical values of Beresnev and Chernyak and also experimental results of the litterature. We finally conducted a study where we applied the device with soot aggregates that have variable morphology and physicochemical nature. This study confirmed the results presented by Mackowski and Brugière about the increase of the aggregates thermophoretic diffusion coefficients Kth with the primary particle number and therefore with the electrical mobility diameter. A confrontation between the coefficients Kth of the different types of aggregates allowed us to find an influence of the primary particles diameter, the fractal dimension Df and also the ratio EC/TC on the thermophoretic behavior of soot aggregates
Sandid, Mohamed Habib. "Contribution à l'étude des aéroréfrigérants : comportement des tubes à ailettes à haute température." Valenciennes, 1987. https://ged.uphf.fr/nuxeo/site/esupversions/25a3d1c4-6ca4-4edb-b0f4-1e509e6f0c38.
Full textBouchoucha, Ali. "Étude du comportement en frottement et usure des contacts électriques glissants cuivre-acier et cuivre-graphite." Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL006N.
Full textCanet, Valentine. "Étude du comportement et de la stabilité des rideaux de soutènement." Châtenay-Malabry, Ecole centrale de Paris, 1985. http://www.theses.fr/1985ECAP0016.
Full textBelmokhtar, Malik. "Contributions à l'étude du comportement thermo-hydro-mécanique de l'argilite du Callovo-Oxfordien (France) et de l'argile à Opalinus (Suisse)." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1026/document.
Full textDeep low permeability claystones (10-20 m2), such as Callovo-Oxfordian claystone (COx) in France or the Opalinus Clay in Switzerland, are potential host rocks for deep geological radioactive waste disposal. During the various phases of the storage, these rocks will be subjected to thermo-hydro-mechanical (THM) coupled effects. The determination of their THM parameters remains to be completed for a better understanding of the near-field response of the storage galleries.The experimental study of low permeability geomaterials is difficult and several questions about their THM behavior still remain. In this context, two original experimental systems with high precision local strain measurements and reduced drainage lengths (H) were developed and used for saturated drained tests: an isotropic compression cell (H = 10 mm) and a standard triaxial cell with a reduced drainage length using a geotextile placed around the sample (H = 19 mm).A detailed poroelastic characterization of the COx argillite in the isotropic cell provided a set of compatible transverse isotropic poroelastic parameters of the material, identified in a theoretical framework allowing to determine the Biot tensor components (coefficients b1 and b2, perpendicular and parallel to bedding plans, respectively). A key parameter not well documented to date is the unjacketed modulus that was determined by means of an unjacketed compression test (Ks = 21.7 GPa).A temperature control and an accurate calibration of thermal parasite effects allowed the investigation of the thermal volumetric response of the COx argillite during a drainage test under constant isotropic confining stress close in-situ state conditions. A thermoelastic expansion followed by a thermoplastic contraction was observed, with a transition at a temperature of 48 °C, close to the highest temperature supported during the geological history of the claystone. It is thus confirmed that such claystones keep in memory the maximum supported geological temperature. The precision of the deformation measurements also made it possible to identify a volumetric creep that is enhanced at 80 °C.Poroelastic calculations with the boundary conditions of the improved drainage system allowed to determine the magnitude of axial strain rates allowing good drainage during triaxial drained shearing (6.6×10-8 s-1). The drained tests carried out on the COx claystone showed a good compatibility with a criterion already published. Coherent data were also obtained on the Opalinus Clay failure criterion, that were compared to those of uniaxial compression tests at different speeds on samples equilibrated at 94% relative humidity, that exhibited a dependence of the peak strength on the shear rate.These results make it possible to reduce the uncertainties concerning the THM properties of claystones and should allow a better estimation of the response of the near field close to the galleries during the different phases of their service period.Key words: claystone, permeability, drainage, saturation, poroelasticity, Biot coefficient, transverse isotropy, triaxial testing, heating, creep
Ba, Adji Cathy. "Étude du comportement tribologique d'un couple de matériaux ferromagnétique acier XC48 en contact mécanique et magnétique à sec." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2318/document.
Full textThis thesis is about the study of the tribological behavior of a couple of ferromagnetic materials XC48 steel in mechanical and magnetic dry contact. It consists in identifying the generated effects of the presence or absence of a magnetic field at the static and sliding contact interface. The first step was to establish constraint equations which govern the linear, punctual and surface response of the solids under given loadings, by using models developed in the theory of elasticity. They were then simulated under Mathematica to obtain analytical results of stress fields in sub-surfaces. In the second phase, the dry contact tests carried out by means of a standard pin-on-disc tribometer reveal an increase in the coefficient of friction with the magnetic field on the tribological contact. The analysis by X-ray diffraction shows that the wear debris during the tests with magnetic field comprises the presence of iron oxide. The characterization by scanning electron microscopy and profilometry of worn material shows the state of the sub-surface with modification of the grain structure and presence of soft wear from testing with magnetic field. The photoelasticity measurements show the influence of the magnetic field on the stress fields. By varying the kinematic parameters of the test on our numerical model, we observe an increase in stress fields. These mechanical, magnetic and physicochemical parameters are complex and the study contributes to understanding these problems of dry friction
Pavier, Edith. "Caractérisation du comportement d'une poudre de fer pour le procédé de compression en matrice." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0042.
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