Letteratura scientifica selezionata sul tema "Matériaux composites sandwichs"
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Articoli di riviste sul tema "Matériaux composites sandwichs"
Reyne, M. "Les structures rigides et légères réalisées en matériaux de synthèse sandwich ou composite". Matériaux & Techniques 73, n. 6-7 (1985): 275–80. http://dx.doi.org/10.1051/mattech/198573060275.
Testo completoWahab, Abdul, Jean-Luc Lataillade, Yann-Hervé De Roeck, Peter Davies e Marc Prevosto. "Modèle prévisionnel de réponse dynamique d’une plaque sandwich en matériaux composites à l’impact d’une sphère rigide". Revue des composites et des matériaux avancés 11, n. 1 (23 aprile 2001): 79–95. http://dx.doi.org/10.3166/rcma.11.79-95.
Testo completoWahab, A., N. Moubayed, P. Davies, M. Prevosto e Y. H. De Roeck. "Simulation de la réponse dynamique d’une poutre sandwich en matériaux composites à l’impact d’une sphère rigide". Matériaux & Techniques 98, n. 5 (2011): 339–46. http://dx.doi.org/10.1051/mattech/2010110.
Testo completoPassilly, Bruno, Benjamin Lamboul e Jean-Michel Roche. "Indentation haute fréquence : vers le contrôle non-destructif des structures". Matériaux & Techniques 105, n. 1 (2017): 110. http://dx.doi.org/10.1051/mattech/2017026.
Testo completoIthurralde, Guillaume, e Franck Maurel. "Inspection Ultrasonore Robotisée de Pièces Composites". e-journal of nondestructive testing 28, n. 9 (settembre 2023). http://dx.doi.org/10.58286/28516.
Testo completoTesi sul tema "Matériaux composites sandwichs"
Salloum, Joulia. "Comportement mécanique de Matériaux Sandwichs Innovants pour application nautique". Electronic Thesis or Diss., IMT Mines Alès, 2023. http://www.theses.fr/2023EMAL0017.
Testo completoThis work consists of an experimental and numerical study of the mechanical behaviour of sandwich composite materials used in the nautical industry, up to damage occurrence and its evolution. For eco-design purposes, the facings are made of NCF triaxial basalt fibre laminates and a partially bio-sourced resin (greenpoxy), and the core consists of recycled PET foam. In addition to preparing these materials via vacuum infusion and conducting their microstructural and mechanical characterisation, the main goal of this study is to develop a robust model capable of predicting the response of these sandwich materials under static loading. It is worth noting that all conducted mechanical tests, including compression of the foam alone, simple traction of the monolithic in different directions, or bending of the sandwich composite, are instrumented by image correlation on multiple sides of the specimen to monitor the real-time damage evolution. Furthermore, a 3D finite element study of the mechanical response of the single components (foam and monolithic) and the sandwich is carried out based on Abaqus® simulations to assess the applicability of failure criteria and damage evolution methods. For instance, regarding the foam, the "crushable foam" model was used to predict its collapse within the sandwich structure. As for the monolithic, a progressive damage model of the fibre/matrix constituents is adopted within each ply, and cohesive elements between adjacent plies are used to account for delamination on a mesoscopic scale. This methodology aims to predict the initiation and accumulation of damage in the laminate. The proposed methodology is generic and provides an evolving basis for introducing the concept of cohesion between fibre and matrix, the effectiveness of which is intended for evaluation
Khawar, Farooq Muhammad. "Comportement mécanique des composites sandwichs en statique et fatigue cyclique". Le Mans, 2003. http://cyberdoc.univ-lemans.fr/theses/2003/2003LEMA1006.pdf.
Testo completoThe aim of the this study is to investigate the mechanical behaviour of sandwich composite materials under static and fatigue. Initially, static and fatigue testing of cores in compression, indentation, shear and three-point bending tests and skins in flexural tests are conducted to derive the mechanical behaviour and the characteristics for the constituants of the sandwich composites. Detailed investigations have been carried out to study the performance of sandwich specimens of different core thickness and densities at various span lengths in static flexural tests. Phenomena of pure bending and shear are characterised at different span lengths and compared to the results obtained by the sandwich beam theory. Damage initiation, progression, coalescence and failure are observed in sandwich specimens during fatigue testing and correlated with stiffness degradation. Mechanical behaviour of sandwich composites is highly affected by the core thickness and the density of the foams and depends on the type of loading, the frequency, as well as the applied loading levels and ratios. Fatigue life is characterised by Wohler curves using N10 criterion for different types of sandwich composites. Finally, analytical models are developed on the basis of a stiffness degradation approach to predict the fatigue life and damage development in sandwich composite materials. A good agreement is found between experimental and analytical results
Tran, Van Luan. "Etude du comportement hygro-thermo-mécanique d'un matériau composite sandwich avec âme balsa utilisé en applications navales". Nantes, 2013. http://www.theses.fr/2013NANT2001.
Testo completoSandwich composite structures have been widely adopted in the naval field because they exhibit both lightness and good mechanical strength. However, their resistance to moisture in the marine environment is difficult to predict, and their fire resistance is one of the main limitations to their use in a greater number of cases. In this work, we focus on the behavior of a composite sandwich composed with glass-polyester skins and balsa core. Balsa, which is the main constituent, can absorb a large amount of water which may affect its mechanical properties. Moreover, the presence of moisture can influence the fire resistance of the material. Thus, in order to highlight the material durability and the physical phenomena encountered, several experiments were performed in miscellaneous conditions of humidity, temperature and mechanical loadings. In addition to classical results obtained on the balsa, testing of fire resistance combined with bending tests on sandwich composite materials were achieved to estimate the residual strength as a function of the combustion time. Finally, from experimental results related to the water uptake of balsa and of sandwich composite, modelling was computed to better understand and predict the mechanical state of the studied sandwich structure
Rizk, Georgio. "Durabilité des matériaux composites sandwichs en conditions extrêmes : tenue au feu et évolution des propriétés mécaniques". Thesis, Nantes, 2018. http://www.theses.fr/2018NANT4098/document.
Testo completoComposite materials play an increasingly important role in our society in many fields (aeronautics, naval, civil engineering), because of their advantages in terms of lightness, unalterability and rigidity. It is therefore essential to understand and evaluate their properties in the long term (durability). However, the use of this type of material requires special precautions, particularly with regard to fire resistance. Indeed, sandwich composites are highly flammable and poorly heat resistant. The aim of this thesis project is to study in a combined way the thermomechanical durability (fire resistance) of polymer matrix composite sandwich materials by means of experimental measurements with a calorimeter cone. It is also a question of modeling the variations of mechanical properties induced as a function of the temperature and the combustion time, using a multiphysical model based on a finite element approach (Abaqus). The processes of thermal degradation of these materials are presented as a function of temperature and time, as well as behavior laws and of thermal and mechanical properties predictions. An improved thermal numerical model is programmed and validated in relation to experimental fire resistance measurements (oven, calorimeter cone). Confrontations between experimental measurements and numerical model, performed under several fire resistance scenario configurations, are carried out in order to understand and predict the behavior and thermomechanical properties of composite sandwich materials
Lascoup, Bertrand. "Analyse et modélisation du comportement mécanique de structures composites sandwichs multi-D". Compiègne, 2005. http://www.theses.fr/2005COMP1585.
Testo completoThe objective of this work is to apprehend the damaging modes of an original sandwich structure strengthened by stitches and to propose a predictive tool for the choice of the geometrical and material parameters. This objective requires both an experimental and a theoretical approach. The experimental part enables to determine the behavior of this type of structure under static and dynamic stresses. A R TM device was created in order to control the implementation parameters and to highlight the influence of the microstructure of the reinforcements. The analysis of the damage mechanisms highlights the influence of the geometrical parameters of stitches on the behavior of the structure. The problems resulting from the inter-laminar efforts are attenuated: the brittleness of the core/skin interface and delamination into the skins is reduced. The modelling part allows to represent the material behavior by using simple and adapted theories and seeks to predict the rigidity and the maximum stress in the three directions. A data-processing tool named SANDTEX brings a predictive tool to the industrial world
Ben, Ammar Imen. "Contrôle de santé vibro-acoustique de l'endommagement des matériaux composites à base polymère pour l'aéronautique". Thesis, Le Mans, 2014. http://www.theses.fr/2014LEMA1014/document.
Testo completoThe present study investigates the mechanical behavior under static, fatigue, linear and non linear vibration and assesses damage by the acoustic emission method of laminated composite materials (tensile and buckling) and of sandwich composite materials (4 points bending)
Idriss, Moustapha. "Analyse expérimentale et par élément finis du comportement statique et vibratoire des matériaux composites sandwichs sains et endommagés". Phd thesis, Université du Maine, 2013. http://tel.archives-ouvertes.fr/tel-00808603.
Testo completoHoang, Minh Phuc. "Homogénéisation analytique de structures de nid d'abeille pour des plaques composites sandwich". Thesis, Reims, 2015. http://www.theses.fr/2015REIMS011/document.
Testo completoThe aim of this thesis is to develop an analytical homogenization model for the honeycomb core sandwich panels. Unlike conventional methods, the skin effects are taken into account, leading to a very different mechanical properties. In the cases of extensions, bendings, in-plane shear, transverse shears andtorsion, different analytical function series are proposed to consider the stress redistribution between the honeycomb walls. We have studied the influence of the height of the core on its homogenized properties. The moduli curves obtained by the present H-models are well bounded by the moduli values obtained by the beam theory. The interface stresses are also studied to compare with existing models for stretching problem. Many numerical computations with our H-models have been done for the problems of stretching, bending, in-plan and transverse shearing, as well as torsion. Very good agreement has been achieved between the results of the H-models and the results obtained by finite element simulations by completely meshing thesandwich panel with shell elements. Our H-models have been applied to the computations of industrial large sandwich panels with honeycomb core. The comparison of the results between the H-models and the simulations with Abaqus shell elements are in very good agreement
Min, Kyung-Tak. "Optimisation d'un cylindre en sandwich composite soumis à des sollicitations combinées". Compiègne, 1985. http://www.theses.fr/1985COMPI201.
Testo completoKail, Renaud. "Modélisation asymptotique et numérique de plaques et de coques stratifiées". Paris 6, 1994. http://www.theses.fr/1994PA066606.
Testo completoCapitoli di libri sul tema "Matériaux composites sandwichs"
Jetteur, Philippe, Michael Bruyneel e Jean-Charles Craveur. "Chapitre 5. Structures sandwiches". In Structures en matériaux composites, 109–47. Dunod, 2019. http://dx.doi.org/10.3917/dunod.bruyn.2019.01.0109.
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