BARRE, Pierre-Jean BEAREE, Richard
L’augmentation des performances des machines de positionnement passe par l’augmentation des accélérations et donc des sollicitations transmises à la structure de la machine. Ces contraintes sont susceptibles d’engendrer des déformations et des vibrations dégradant le suivi de profil ainsi que le positionnement final. Les commandes numériques avancé...
BLERON, Laurent RATLE, Alain MARCHAL, Rémy DENAUD, Louis
In the course of most wood machining processes, operators are usually able to detect various problems simply by hearing the sound emitted by the process. This is especially true for wood peeling. Lathe checks formation has been identified as one of the typical situations that an experimented peeler can detect. Poplar and beech veneer samples have b...
COMBESCURE, Alain ABED-MERAIM,
L’intérêt de disposer d’éléments finis volumiques capables de modéliser des structures minces est motivé par de nombreux problèmes industriels. Ainsi, ces dernières années, plusieurs travaux ont été réalisés dans ce domaine. Ces éléments coques épaisses ont de nombreux avantages : ils sont capables de représenter le comportement de structures mince...
COMBESCURE, Alain ABED-MERAIM,
In this work, the formulation of the SHB8PS finite element is reviewed in order to eliminate some persistent membrane and shear locking phenomena. This is a solid-shell element based on a purely three-dimensional formulation. In fact, the element has eight nodes as well as five integration points, all distributed along the "thickness" direction. Co...
TRINH, Vuong-Dieu COMBESCURE, Alain ABED-MERAIM,
Cet article décrit le développement d’un nouvel élément fini prismatique SHB6 de type solide-coque, obtenu à partir d’une formulation purement tridimensionnelle. Cet élément possède six nœuds et cinq points d’intégration répartis selon la direction de l’épaisseur. L’objectif étant d’avoir des éléments à géométrie volumique capables de modéliser des...
COMBESCURE, Alain ABED-MERAIM,
In this work, a new physically stabilized and locking-free formulation of the SHB8PS element is presented. This is a solid-shell element based on a purely 3D formulation. It has eight nodes as well as five integration points, all distributed along the “thickness” direction. Consequently, it can be used for the modeling of thin structures, while pro...
COMBESCURE, Alain ABED-MERAIM,
In this study, the formulation of the SHB8PS solid-shell element is reviewed in order to eliminate some persistent membrane and shear locking phenomena. The resulting physically stabilized and locking-free finite element consists in a continuum mechanics shell element based on a purely three-dimensional formulation. In fact, this is a hexahedral el...
VERGÉ, Michel COFFIGNAL, Gérard GANAPATHI, Manickam MECHBAL, Nazih
In this paper, the problem of increasing reliability of active control procedure is considered. Indeed, a design method of rejection perturbation in presence of potentially faults, on a flexible structure with integrated piezo-ceramics, is presented. The piezo-ceramics are used as actuators and sensors. A single unit based solution, which handles b...
BANVILLET, Alexis LAGODA, T. MACHA, E. NIESLONY, A. PALIN-LUC, Thierry VITTORI, Jean-François
Fatigue test results on the 10HNAP steel under constant amplitude and random loading with non-Gaussian probability distribution function, zero mean value and wide-band frequency spectrum have been used to compare the life time estimation of the models proposed by Bannantine, Fatemi–Socie, Socie, Wang–Brown, Morel and Łagoda–Macha. Except the Morel ...