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SAM : Science Arts et Métiers
Institutional Repository
1515 Publications
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  • Towards gigantic RVE sizes for 3D stochastic fibrous networks

    Dirrenberger, J.; Forest, S.; Jeulin, D. (2014)
    The size of representative volume element (RVE) for 3D stochastic fibrous media is investigated. A statistical RVE size determination method is applied to a specific model of random microstructure: Poisson fibers. The definition of RVE size is related to the concept of integral range. What happens in microstructures exhibiting an infinite integral range? Computational homogenization for thermal and elastic properties is performed through finite elements, over hundreds of realizations of the s...

    Hole Surface Topography and Tool Wear in CFRP Drilling

    Poulachon, Gérard; Outeiro, José; Ramirez, Christophe; André, Victorien; Abrivard, Guillaume (2016)
    This paper deals with the hole surface quality when CFRP drilling. Mechanical instrumented operations have enabled to follow precisely the damage on the tool margins and the main cutting edges. The amount of uncut fibers according to the drill wear was evaluated with a roundness/cylindricity device versus the fiber’s orientation and the tool damage. Thus, according to the hole’s diameter tolerance, a wear criterion was defined to limit the number of holes achievable. This method has been carr...

    Modélisation et commande d'une hydrolienne équipée d'une génératrice asynchrone double alimentation

    Benelghali , Seifeddine; Benbouzid , Mohamed; Charpentier , Jean-Frederic (2010)
    Cet article traite de la modélisation et de la commande d’un système de récupération de l’énergie des courants de marée ; à savoir une hydrolienne équipée d’une génératrice asynchrone double alimentation. Dans un premier temps et dans le but de pouvoir évaluer les performances et la dynamique de l’hydrolienne, dans différentes conditions de fonctionnement, un modèle multiphysique est implanté sous Matlab/Simulink®. Ensuite, une stratégie de commande MPPT sans capteur de vitesse de la gé...

    An ontology of the submarine relief for analysis and representation on nautical chart

    Yan, Jingya; Guilbert, Eric; Saux, Eric (2013)
    A nautical chart is a kind of map used to describe the seafloor morphology and shoreline of adjacent lands. One of its main purposes is to guaranty safety of navigation. As a consequence, construction of a nautical chart follows very specific rules. The cartographer has to select and highlight undersea features according to their relevance to navigation. In an automated process, the system must be able to identify and classify these features from the terrain model. This paper aims therefore a...

    Squeal Complex Eigenvalue Analysis, Advanced Damping Models and Error Control

    VERMOT DES ROCHES, Guillaume; CHIELLO, Olivier; BALMES, Etienne; LORANG, Xavier (2015)
    Estimation of brake systems stability related to noise emission is part of the industry state-of-the-art for brake design. Improved assessment of stability would allow better NVH performance from early design stages thus reducing costs related to late redesign and testing. The prediction capability however remains challenged due to the complexity of brake noise phenomena. In particular, integration and resolution of complex systems with damping is a difficult task that is commonly overlooked....
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