Littérature scientifique sur le sujet « Matériaux d'âme »
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Consultez les listes thématiques d’articles de revues, de livres, de thèses, de rapports de conférences et d’autres sources académiques sur le sujet « Matériaux d'âme ».
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Articles de revues sur le sujet "Matériaux d'âme"
Diallo, Baba. « Aspect épidémiologique de la reconstitution des dents anterieures supérieures avec le composite dans le Cabinet 9 du CHU-CNOS de Bamako au Mali ». Mali Santé Publique 10, no 1 (24 juillet 2020) : 60–63. http://dx.doi.org/10.53318/msp.v10i1.1664.
Texte intégralMatthews, John V., Charles E. Schweger et Owen L. Hughes. « Plant and Insect Fossils from the Mayo Indian Village Section (Central Yukon) : New Data on Middle Wisconsinan Environments and Glaciation ». Géographie physique et Quaternaire 44, no 1 (18 décembre 2007) : 15–26. http://dx.doi.org/10.7202/032794ar.
Texte intégralThèses sur le sujet "Matériaux d'âme"
Mezeix, Laurent. « Développement de matériaux d'âme pour structures sandwich à base de fibres enchevétrées ». Toulouse 3, 2010. http://thesesups.ups-tlse.fr/5524/.
Texte intégralIncreasing applications of lightweight structures in aeronautical applications requires advanced composite materials. Sandwich structures offer great stiffness over weight ratio. By varying the core, the thickness and the material of the face sheet of the sandwich structures, it is possible to obtain various properties and desired performance. One of the drawbacks of the materials currently used is their expensive manufacturing cost or the difficulty to integrate new functions such as electrical conductivity. In this thesis, a new innovative multifunctional core material for sandwich structure is designed for aeronautical applications. The objective is to obtain a low cost material and easy to manufacture. The properties of the material can be modified in function of the solicitations (vibration, impact. . . ). Finally the material must present an open porosity to be able to evacuate water due to the condensation of the air humidity. Fibres network bonded together by resin is firstly manufactured by a process designed during this work. Different parameters are studied as the type, the length or the quantity of fibres. Then the behaviours under tension, compression, bending and under low velocity impact are studied. Moreover, the fibres networks are compared to core material used currently in the industry. Then an analytical model is proposed to determine the initial rigidity of fibres networks. This method can be applied for all sorts of fibres networks where the fibres are bonded together. Finally, the behaviour under low velocity impact is studied and modelled by finite element methods
Piollet, Elsa. « Amortissement non-linéaire des structures sandwichs à matériau d'âme en fibres enchevêtrées ». Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0031/document.
Texte intégralSandwich structures are widely used in aerospace applications for their very good stiffness to weight properties. However, the damping properties of these structures have to be improved for user comfort and structural durability. The aim of this thesis is to study how the use of a recently developped core material can increase damping in sandwich structures. This material is made with entangled carbon fibres cross-Linked with epoxy resin. The entangled-Cross-Linked material is first studied separately. Experimental measurements show that the behavior depends strongly on strain amplitude and excitation history, while it depends weakly on frequency. A hysteresis model is developed to describe measured stress-Strain loops. A single-Degree-Of-Freedom structure containing the material is studied theoretically to show the effect of the different parts of the hysteresis loops on the steadystateand transient responses. The material is then included in a sandwich beam. A model for the bending vibrations of a sandwich beam is developped to include any nonlinear nonconservative behavior of the core material. Sandwich beams are then studied experimentally, showing a much higher damping than for classical core materials such as honeycomb. Simulations made with the sandwich beam model and the hysteresis loop model capture well the observed nonlinear phenomena. At the end of the study, a mixed use of honeycomb and entangled-Cross-Linked core materials is proposed, in order to obtain a high level of damping without adding much weight to the structure
Rasamimanana, Georges. « Le trapp de Raon-l'Etape : un témoin du volcanisme calco-alcalin d'âge devono-dinantien dans les Vosges septentrionales, et un matériau largement utilisé en génie civil ». Nancy 1, 1987. http://www.theses.fr/1987NAN10235.
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