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Статті в журналах з теми "Fatigue multiaxiale du caoutchouc"
Camara, Aliou Badara, Fabienne Pennec, Emmanuel Laurans, Vincent Peyronnet, Jean-Louis Robert, and Abdelhamid Bouchaïr. "Influence du type de démarche de fatigue multiaxiale sur la prévision de durée de vie d’un assemblage boulonné." Matériaux & Techniques 106, no. 2 (2018): 203. http://dx.doi.org/10.1051/mattech/2018038.
Повний текст джерелаPoncelet, M., G. Barbier, B. Raka, L. Vincent, and R. Desmorat. "Étude de l’endommagement d’un acier inoxydable austénitique par fatigue multiaxiale à grand nombre de cycles." Revue de Métallurgie 107, no. 2-3 (February 2010): 51–57. http://dx.doi.org/10.1051/metal/2010006.
Повний текст джерелаFlacelière, L., and F. Morel. "Modélisation du cumul de dommage en fatigue multiaxiale polycyclique – Confrontation aux essais pour un acier ferrito-perlitique C35." Revue de Métallurgie 107, no. 2-3 (February 2010): 93–100. http://dx.doi.org/10.1051/metal/2010004.
Повний текст джерелаLe Cam, Jean-Benoît, Franck Pérocheau, Bertrand Huneau, Erwan Verron, and Laurent Gornet. "Importance de la cavitation lors de la fissuration en fatigue du caoutchouc naturel chargé." Mécanique & Industries 7, no. 2 (March 2006): 123–29. http://dx.doi.org/10.1051/meca:2006026.
Повний текст джерела"The effect of natal on multiaxial fatigue. Comparison of some criteria application to steel 30NCD16 (L'effet d'entaille en fatigue multiaxiale: validité comparée de quelques critères application à l'acier 30NCD16)Dubar, L., Froustey, C. and Lasserre, S. Rev. Fr. Mec. 192 (1), 89–97 (in French)." International Journal of Fatigue 15, no. 4 (July 1993): 346. http://dx.doi.org/10.1016/0142-1123(93)90432-p.
Повний текст джерелаДисертації з теми "Fatigue multiaxiale du caoutchouc"
Dong, Shanyan. "Etude de la fatigue du caoutchouc naturel sous sollicitation multiaxiale." Paris, CNAM, 2009. http://www.theses.fr/2009CNAM0678.
Повний текст джерелаRubber is widely used in the industry. One of the major problems encountered in the applications of rubber remains still the prediction of the fatigue life of rubber. Since the components industrial undergo complex loading, we focus our subjects on fatigue of rubber under complex loading in this study. The objectives of this study should include the following points:1) To have a good understanding of the mechanism of multiaxial fatigue of rubber;2) To identify the existing approaches for analyzing the multiaxial fatigue of rubber, and hen develop a new approach;rubber, 3) To evaluate the existing and new approaches according to the test results. In order to accomplish these objectives, three different specimens are adopted. With these specimens we carry out several series of fatigue test under axial and biaxial loading on an INDTRON biaxial fatigue machine. The simulation of the specimens is performed by Finite Element Method. The fatigue lives of rubber are studied according to the test results. The tomography method is used to study the damage inside the rubber during the fatigue process by a medical scanner. Finally, the fatigue crack surfaces are examined by S. E. M
Beurrot-Borgarino, Stéphanie. "Cristallisation sous contrainte du caoutchouc naturel en fatigue et sous sollicitation multiaxiale." Phd thesis, Ecole centrale de nantes - ECN, 2012. http://tel.archives-ouvertes.fr/tel-00835499.
Повний текст джерелаBeurrot, Stéphanie. "Cristallisation sous contrainte du caoutchouc naturel en fatigue et sous sollicitation multiaxiale." Ecole Centrale de Nantes, 2012. https://tel.archives-ouvertes.fr/tel-00835499.
Повний текст джерелаNatural rubber is well-known for its excellent mechanical properties in multiaxial fatigue and those are generaly attributed to the ability of the material to crystallize when strained. However, the relationship between strain-induced crystallization and mechanical properties of natural rubber has never been established. The aim of this thesis is therefore to understand the origin of the great multiaxial fatigue properties of carbon black-filled natural rubber, by considering two small scales of study, as opposed to the macroscopic scale generally considered. The first part of this thesis is dedicated to uniaxial crack growth and energy dissipation mechanisms at the cracks and micro-cracks scale ; those mechanisms are determined thanks to original in-situ propagation tests observed with scanning electron microscope. In the second part of the thesis, strain-induced crystallization is studied at the macromolecular scale, in static multaxial deformation on the one hand and in uniaxial fatigue on the other hand, thanks to X-ray diffraction measurements performed at the Soleil synchrotron facility. The characteristics of crystallites, i. E. Their size, orientation, number and lattice parameters, are measured during the different mechanical tests. We observe that in multiaxial deformation, the crystallites are similar in size and have the samei lattice parameters than those nucleated in uniaxial deformation, but their orientation strongly varies with the multiaxiality of the deformation and is not influenced by the loading path. Finally, we show that in uniaxial fatigue, the characteristics of the crystallites evolve with the number of cycles, differently depending on the minimum and maximium stretch ratios reached at each cycle
Layouni, Khaled. "Comportement et fatigue multiaxiale d'un élastomère chargé (NR-CB)." Paris, ENMP, 2004. http://www.theses.fr/2004ENMP1242.
Повний текст джерелаThis work explores the mechanical behaviour of a carbon-black reinforced natural rubber (NR-CB) subjected to monotonic, cyclic, uniaxial and multiaxial loading. Several physical phenomena have been identified. In particular, we have characterised the material compressibility under various kinds of loading conditions and confirmed the results by means of microscopic observations. Consequently, in order to describe the material behaviour, we have considered and compared two constitutive models: the first one is hyperelastic incompressible whereas the second one is more realistic as it uses a damage-induced compressible approach. Furthermore, fatigue experimental results obtained under complex loading histories allow to describe the interaction between axial and torsional loading. In particular, the phase angle effect on the lifetime and the crack location have been determined. These analyses were supported by fractographic observations that allow the identification of different tearing steps (macroscopic scale) and initiation sites (microscopic scale). Finally, we have established a model able to predict the location and orientation of cracks, as well as lifetime under complex loading. This criterion has been validated for complex geometry and industrial components. Finally, we have compared this model with another taken in literature
Warneboldt, Iona. "Multiaxial fatigue design of elastomeric parts using Equivalent Fatigue Loads." Electronic Thesis or Diss., Brest, École nationale supérieure de techniques avancées Bretagne, 2022. http://www.theses.fr/2022ENTA0002.
Повний текст джерелаThis thesis introduces an Equivalent Fatigue Load (EFL) approach for the multiaxial fatigue design of elastomeric parts. As direct Finite Element Analysis (FEA) calculations of automotive in-service loads (Road Load Data (RLD)) are too expensive, the objective is to derive simplified load blocks as a realistic input for numerical damage calculations. Three streps are applied for this method: the localization method, the material damage function and the EFL determination process. Various fatigue tests have been conducted (415 samples) to study the fatigue behavior of this complex type of relaxing and non-relaxing multiaxial loading on natural rubber specimens. Lifetime and crack features are analyzed to eventually introduce an appropriate critical planebased fatigue measure and to establish a novel mean strain effect model. This criterion is generalized throughout an original critical plane search method. To estimate the local mechanical response (localization method), this thesis identifies an axes-coupling method that is fitted for the nonlinear nature of elastomeric structures. It is based on the multiplicative decomposition of the deformation gradient tensors. These two steps are then implemented in the framework of the EFLdetermination process. For this, a global optimization method is added to determine the simplified load blocks, causing locally the same fatigue behavior in the given structure. The computational costs of this optimization are reduced by only considering a subset of the most damaged material points for EFLdetermination. Finally, the method has been challenged on a specimen to outline its capabilities and to validate the approach
Raoult, Ida. "Structures élastomères sous chargement cyclique : comportement, fatigue, durée de vie." Phd thesis, Ecole Polytechnique X, 2005. http://tel.archives-ouvertes.fr/tel-00521633.
Повний текст джерелаPoisson, Jean-Louis. "Détermination d'un critère de fatigue multiaxial appliqué à un élastomère synthétique." Phd thesis, Université François Rabelais - Tours, 2012. http://tel.archives-ouvertes.fr/tel-00780307.
Повний текст джерелаMorel, Franck. "Fatigue multiaxiale sous chargement d'amplitude variable." Poitiers, 1996. http://www.theses.fr/1996POIT2364.
Повний текст джерелаSermage, Jean Philippe. "Fatigue thermique multiaxiale à température variable /." Cachan : Laboratoire de mécanique et technologie, 1998. http://catalogue.bnf.fr/ark:/12148/cb370383779.
Повний текст джерелаWeber, Bastien. "Fatigue multiaxiale des structures industrielles sous chargement quelconque." Lyon, INSA, 1999. http://theses.insa-lyon.fr/publication/1999ISAL0056/these.pdf.
Повний текст джерелаThe work of thesis deals with multiaxial fatigue. Its purpose is the fatigue life assessment of industrial structures submitted to any kind of solicitations, from the most basic case, which is uniaxial and periodical, to the most general one, which is multiaxial and of variable amplitude. The first part is dedicated to the study of multiaxial fatigue stress-based criteria. 37 criteria issued from the literature are analysed. They are divided into empirical, critical plane and global approaches. 24 criteria are validated through 233 multiaxial fatigue tests issued also from the literature. The second part aims at taking into account the stress gradient effect within the multiaxial criteria formulation. Similarly to some recent work, the stress gradient effect is introduced within the Laboratory's criteria. These propositions are validated through combined bending-torsion tests. A proposition is made to calculate the stress gradient field from finite elements results obtained over any complex industrial structure. The third part describes the evolution of the Laboratory's fatigue life prediction method under multiaxial random loading. The first step presents a plane per plane damage accumulation. The fatigue damage is calculated and cumulated on physical planes. The second step shows the influence of the so-called counting variable on the fatigue life prediction results, and leads to a new concept: the cycle counting and the damage assessment are performed plane per plane. This procedure avoids the dependence of the choice of the counting on the life assessments. A critical plane approach criterion is required for these latter methods. This work is integrated to an industrial software called Sollife allows one to simulate the fatigue behaviour of any complex structure. The first results are in good assessment with experiments. They show the important effect of metal forming process (as stamping) and result in lots of perspectives
Книги з теми "Fatigue multiaxiale du caoutchouc"
Fatigue, stress, and strain of rubber components: A guide for design engineers / Judson T. Bauman. Cincinnati, Ohio: Hanser Publications, 2008.
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