Дисертації з теми "Composite materials marine"
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1
Alston, Jarrod John. "Room/Corner Fire Calibration Data: Marine Composite Screening Specimens." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0527104-180727/.
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Tekalur, Srinivasan Arjun. "Faliure of marine composite materials due to blast loading /." View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3284829.
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Grenier, Andrew T. "Fire Characteristics of Cored Composite Materials for Marine Use." Digital WPI, 2002. https://digitalcommons.wpi.edu/etd-theses/611.
Повний текст джерелаАнотація:
A material study was conducted on two types of cored composite materials used in shipbuilding: a GRP/Balsa Cored sandwich and a GRP/PVC Foam Cored sandwich. The two materials were tested in the Cone Calorimeter and the LIFT Apparatus to obtain data on ignitability, heat release rate, mass loss rate, and smoke production. The observed phenomena of delamination, melting and charring of the core materials, and edge effects are discussed in the context of how they affect test results. The ignition data analysis method specified in ASTM E 1321 "Standard Test Method for Determining Material Ignition and Flame Spread Properties" and Janssens' "improved" method of analysis were both used to derive effective material properties of the test materials. These two analysis methods are shown to produce different material property values for critical irradiance for ignition, ignition temperature, and the effective thermal property, $k ho c$. Material properties derived using Janssens' method are shown to be more consistent between the two test materials and the two different test methods; they were also shown to be better predictors of time to ignition when compared to actual test data. Material properties are used as input to Quintiere's fire growth model in order to evaluate their affect on time to flashover predictions in the ISO 9705 Room/Corner test scenario. Recommendations are made for future testing of cored composite materials, ignition data analysis methods, predictive fire growth models, and other work with composite materials. ** This copy contains no figures or appendices **
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Kabche, Jean Paul. "Structural Testing and Analysis of Hybrrid Composite/Metal Joints for High-Speed Marine Structures." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/kabchejp2006.pdf.
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Beavers, Kevin Daniel. "Understanding the factors affecting the mechanical properties of marine composites." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Spring2009/K_Beavers_042709.pdf.
Повний текст джерелаАнотація:
Thesis (M.S. in mechanical engineering)--Washington State University, May 2009.Title from PDF title page (viewed on June 5, 2009). "School of Engineering and Computer Science." Includes bibliographical references (p. 157-158).
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Le, Guen-Geffroy Antoine. "Marine ageing and fatigue of carbon/epoxy composite propeller blades." Thesis, Brest, 2019. http://www.theses.fr/2019BRES0104.
Повний текст джерелаАнотація:
Les travaux présentés portent sur l’étude du vieillissement en milieu marin d’un composite carbone époxy pour applications pâles d’hélice de navires. La caractérisation de la prise en eau dans la résine pure et le composite a montré un comportement Fickien. La présence d’eau dans les porosités du composite a également été mise en évidence analytiquement. Le vieillissement accéléré de la résine a mis en évidence trois phénomènes : l’oxydation, le vieillissement physique et la plastification. L’effet mécanique de ces deux derniers a été particulièrement étudié. La présence d’eau et donc d’une résine plastifiée a eu l’effet d’accélérer le vieillissement physique. L’effet du vieillissement accéléré sur le composite a ensuite été étudié sous différentes sollicitations quasi statiques et de fatigue. Peu d’effets de l’eau ont été relevés pour les sollicitations de traction sur des orientations sens fibres. Cependant, des pertes de plus importantes des propriétés mécaniques ont été observés en traction sens transverse aussi bien en statique qu’en fatigue. Ces mêmes résultats ont été trouvés sous sollicitations de flexion grâce à l’essai de flexion quatre points. Ce dernier a été discuté du fait de l’endommagement qu’il provoque. Enfin, le composite a été étudié sous sollicitations de délaminage suivant deux modes de fissuration: ouverture et cisaillement dans le plan. La présence d’eau a eu pour effet de diminuer l’énergie de fissuration dans les deux modes. Ce même résultat a été trouvé sous chargement de fatigue. L’influence du vieillissement physique sur les propriétés mécaniques du composite a également été démontré, son effet étant négatif, il nécessite d’être pris en compteThe current document presents the long term seawater ageing effect on the fatigue properties of carbon fibre reinforced epoxy marine propeller blades. Seawater uptake in the resin and the composite was identified to correspond to a Fickian diffusion. Calculations of the mass to saturation of the composite based on that of the resin reveal the presence of water in the composite’s porosities.Accelerated ageing of the pure resin highlighted three ageing phenomena: oxidation, plasticization and physical ageing. The last two were mechanically characterized separately and coupled with one another. Above all, it was shown that the presence of seawater accelerated the physical ageing kinetics by reducing the relaxation time. The composite was studied under different quasistatic and cyclic loadings.Few effects of seawater have been found for tensile stresses on fibre oriented loadings. This was not the case for transversely loaded composite that showed a non-negligible decrease of the mechanical properties for both static and fatigue loadings. This was also the case for flexure loading which was studied under four-point flexure. This latter test method was particularly studied due to the particular induced damage. The composite was studied under two delamination loadings: crack opening and inplane shear. It was observed that seawater decreased the critical strain energy release rates for both load cases as well of the fatigue resistance of both crack modes. Finally, the effect of physical ageing on the composite was studied and found to be non-negligible, demonstrating the necessity of taking it into account for both ageing and mechanical design
7
Didonè, Marco. "Advanced Non-Destructive Inspections focused on composite materials application for the automotive and marine sectors." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
Знайти повний текст джерелаАнотація:
The goal of this master thesis is to explain in detail the application of Non-Destructive-Inspection on the Automotive and the Marine sectors. Nowadays, these two particular industries faces many challenges, including increased global competition, the need for higher performance, a reduction in costs and tighter environmental and safety requirements. The materials used for these applications play key roles in overcoming these challenges. So, also an NDI procedure need to be planned in order to avoid problems during the manufacturing process and the after sale life of the structures. The entire thesis work has been done in collaboration with Vetorix Engineering.
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Cutter, Philip Anthony. "Predictive methods for the fire resistance of single skin and sandwich composite materials." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/73291/.
Повний текст джерелаАнотація:
Polymer composite materials are becoming increasingly popular in many engineering structures in the civil, aerospace, marine and automotive industries. The increased strength and stiffness to weight ratios which are possible with certain types of composites make them particularly attractive to many high performance applications such as military aircraft, offshore lifeboats and formula one racing cars. One aspect of composite materials which is preventing more widespread use is the perceived poor performance in fire. The perception is due to the fact that organic compounds used in polymer composites are combustible. The loss of the Norwegian Navy’s composite mine hunter vessel Orkla in 2002 to a fire did much to prevent further widespread use of such materials. The work presented here describes the research that has been conducted into assessing and predicting the performance of single skin and sandwich composite materials subjected to fire and mechanical load. The materials that were investigated were representative of the materials used in the construction of Royal National Lifeboat Institution (RNLI) lifeboats. A new method has been developed to assess the response both thermally and mechanically of single skin and sandwich panels subjected to combined fire and mechanical load. This has been done by the construction of a small scale fire and load testing apparatus. An empirical relationship was developed to predict the stiffness of single skin and sandwich panels during a fire and load test. Numerical models have also been generated to predict the thermo-mechanical response of single skin and sandwich panels to fire and load. Testing of single skin and sandwich panels on the newly developed apparatus has been conducted to verify the numerical models. The numerical models and the empirical relationship were used to predict the response of a full scale composite sandwich panel, representative of a lifeboat deck, to a standard cellulosic fire and mechanical load.
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Angelopoulos, Nikolaos. "Damage detection and damage evolution monitoring of composite materials for naval applications using acoustic emission testing." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7597/.
Повний текст джерелаАнотація:
Maritime transport has profound importance for the world economy. Vessels of all sizes constantly transport large numbers of passengers and goods across the sea, often under adverse operational conditions. Vessels need to exhibit high levels of reliability, availability, maintainability and safety (RAMS). However, at the same time their performance needs to be optimised ensuring the lowest possible fuel consumption with the maximum operational capacity and range without compromising RAMS. Sweating of naval assets and profitability should be maximised for the operator ensuring investment in future projects and supporting the growth of maritime transport and world economy as a whole. Vessels have been traditionally manufactured using naval steel grades such AH, DH and EH. Smaller leisure and specialised purpose vessels such as patrol boats, etc. have been built using fibre-reinforced composite (FRC) materials. This trend is gradually penetrating the market of larger commercial vessels including freight and cruise ships. However, these are still the early days and further investigation of the optimum FRC manufacturing techniques and mechanical properties together with an in-depth understanding of the damage mechanics are required before such materials can become more commonplace. This project has investigated different glass FRCs using different manufacturing techniques. Glass fibres are preferred due to their lower cost in comparison with carbon fibres. The use of carbon FRCs in maritime applications is limited to the fabrication of racing and high performance speedboat vessels. Samples manufactured under laboratory conditions have been compared with those manufactured by a shipyard. It has been seen that the in-house samples had generally superior performance. Steel-to-composite joints have also been assessed including different designs. The effect of different features in the design such as drilled holes and bolts on the mechanical performance of the manufactured samples has also been evaluated. The damage mechanisms involved during damage propagation and features causing damage initiation have been considered. Damage initiation and subsequent evolution have been monitored using acoustic emission (AE). Various signal processing approaches have been employed (manual and automatic) for optimum evaluation of the AE data obtained in a semiquantitative manner. It has been shown that AE could be applied effectively for structural health monitoring of naval structures in the field. Several factors and parameters that need to be considered during acquisition and analysis have been successfully determined. The key results of the study together with mechanical testing and characterisation of samples employed are presented in summarised form within the present thesis.
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Verstappen, André Paul. "Passive damping treatments for controlling vibration in isotropic and orthotropic structural materials." Thesis, University of Canterbury. Mechanical Engineering, 2015. http://hdl.handle.net/10092/10197.
Повний текст джерелаАнотація:
The structural vibration damping behaviour of plates and beams can be improved by the application of viscoelastic passive damping materials. Unconstrained layer damping treatments applied to metal plate systems were studied experimentally. Design and modelling of novel fibre reinforced constrained layer damping materials was performed, and implementation of these composite damping materials into laminated composite sandwich constructions commonly used as structural elements within large composite marine vessels was explored. These studies established effective methods for examining, designing and applying damping materials to metal and composite marine structures.
Two test fixtures were designed and constructed to facilitate testing of viscoelastic material damping properties to ISO 6721-3 and ASTM E756. Values of material damping made in accordance with ASTM E756 over a range of temperatures were compared to values produced by a Dynamic Mechanical Analyser (DMA). Glass transition temperatures and peak damping values were found to agree well, although results deviated significantly at temperatures above the glass transition temperature.
The relative influence of damping layer thickness, ambient temperature, edge conditions, plate dimensions and substrate material on the system damping performance of metal plates treated with an unconstrained viscoelastic layer was investigated experimentally. This investigation found that substrate material had the greatest influence on system damping performance, followed by damping layer thickness and plate size. Plate edge conditions were found to have little influence on the measured system damping performance. These results were dependent on the values of each variable used in the study.
Modal damping behaviour of a novel fibre reinforced composite constrained layer damping material was investigated using finite element analysis and experimental methods. The material consisted of two carbon fibre reinforced polymer (CFRP) layers surrounding a viscoelastic core. Opposing complex sinusoidal fibre patterns in the CFRP face sheets were used to achieve stress-coupling by way of orthotropic anisotopy about the core. A finite element model was developed in MATLAB to determine the modal damping, displacement, stress, and strain behaviour of these complex patterned fibre constrained layer damping (CPF-CLD) materials. This model was validated using experimental results produced by modal damping measurements on CPF-CLD beam test specimens. Studies of multiple fibre pattern arrangements found that fibre pattern properties and the resulting localised material property distributions influenced modal damping performance.
Inclusion of CPF-CLD materials in laminated composite sandwich geometries commonly used in marine hull and bulkhead constructions was studied experimentally. Composite sandwich beam test specimens were fabricated using materials and techniques frequently used in industry. It was found that the greatest increases in modal damping performance were achieved when the CPF-CLD materials were applied to bulkhead geometries, and were inserted within the sandwich structure, rather than being attached to the surface.
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Avachat, Siddharth. "Experimental and numerical analyses of dynamic deformation and failure in marine structures subjected to underwater impulsive loads." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44904.
Повний текст джерелаАнотація:
The need to protect marine structures from the high-intensity impulsive loads created by underwater explosions has stimulated renewed interest in the mechanical response of sandwich structures. The objective of this combined numerical and experimental study is to analyze the dynamic response of composite sandwich structures and develop material-structure-property relations and design criteria for improving the blast-resistance of marine structures. Configurations analyzed include polymer foam core structures with planar geometries. A novel experimental facility to generate high-intensity underwater impulsive loads and carry out in-situ measurements of dynamic deformations in marine structures is developed. Experiments are supported by fully dynamic finite-element simulations which account for the effects of fluid-structure interaction, and the constitutive and damage response of E-glass/polyester composites and PVC foams.
Results indicate that the core-density has a significant influence on dynamic deformations and failure modes. Polymeric foams experience considerable rate-effects and exhibit extensive shear cracking and collapse under high-magnitude multi-axial underwater impulsive loads. In structures with identical masses, low-density foam cores consistently outperform high-density foam cores, undergoing lesser deflections and transmitting smaller impulses. Calculations reveal a significant difference between the response of air-backed and water-backed structures. Water-backed structures undergo much greater damage and consequently need to absorb a much larger amount of energy than air-backed structures. The impulses transmitted through water-backed structures have significant implications for structural design. The thickness of the facesheets is varied under the conditions of constant material properties and core dimensions. The results reveal an optimal thickness of the facesheets which maximizes energy absorption in the core and minimizes the overall deflection of the structure.
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Pan, Roberto Chun Yan. "Desenvolvimento de novos compósitos destinado a materiais de construção civil, com base em resíduos industriais de solo de decapagem, lodo e sedimentos de dragagem do porto de Antonina e cal virgem comum." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1376.
Повний текст джерелаАнотація:
Pesquisa realizada para analisar o compósito de solo de decapagem (SD) considerado resíduos nas jazidas de minérios, em especial de calcário do município de Almirante Tamandaré, da Região Metropolitana de Curitiba neste trabalho, juntamente com o lodo e sedimentos de dragagem marinha do Porto de Antonina, no Estado do Paraná, e o uso cal virgem comum, como aglomerante pertencente à região de Almirante Tamandaré. Foram utilizados vários teores dos materiais para a determinação de 12 (doze) compósitos. Para o solo de decapagem os teores variaram entre 30% a 60%, para o material de dragagem os teores variaram entre 20% a 50% e o teor de aglomerante de cal virgem comum variou entre 15% a 30%. Foram moldadas idades de cura de 3 dias, 7, 14, 28, 60, 90, 180 e 365 dias. O aumento da resistência à compressão durante a cura foi proveniente das reações químicas das partículas sólidas das matérias-primas em ambiente alcalino gerando novas formações amorfas. Também foram analisados os materiais nos métodos de MEV com EDS, DRX e FRX, para a obtenção da composição química e formação estrutural dos novos compósitos. Todos os resultados da resistência à compressão uniaxial, com 28 dias de cura ao meio ambiente das 12 (doze) composições, obtiveram resultados médios de 7,7 MPa, atendendo satisfatoriamente a norma NBR 7170:1983 que determina a resistência à compressão igual ou acima de 4,0 MPa, destinada à produção de materiais de construção para alvenaria de vedação, sem fins estruturais. Comprovando o uso desses compósitos em materiais de construção civil, principalmente para os segmentos de blocos ou tijolos de vedações, sem fins estruturais, sem a necessidade de cozimento ou empreendimento de energia calorífica para a cura das peças, contribuindo para o meio ambiente e a sustentabilidade ambiental.Research conducted to analyze the composite with pickling soil (SD), considered waste in mineral deposits, especially of limestone in the city of Almirante Tamandaré, the Metropolitan Region of Curitiba in this work, along with the sludge and marine dredging sediment from the Port of Antonina, State of Paraná, and use the common quicklime as binder belonging to the same region of Almirante Tamandaré. Various amounts of materials were used for the determination of twelve (12) composites. For the stripping soil content ranged from 30% and 60%, for the dredging material contents ranged from 20% and 50% and binder common quicklime content ranged from 15% to 30%. Were molded curing ages of 3 days, 7, 14, 28, 60, 90, 180 and 365 days. The increase in compressive strength during curing was derived from the chemical reactions of solid particles of raw materials in alkaline environment generating the new amorphous formations. Also the raw materials were analyzed in the SEM with EDS method, DRX and FRX, to obtain the chemical composition and formation structures of the new composite. All results of the uniaxial compressive strength, with 28 days of curing the environment of the twelve (12) compositions, obtained average results of 7.7 MPa, satisfactorily meeting the NBR 7170:1983 standard that determines the resistance to compression equal or above 4.0 MPa, for the production of building materials for sealing masonry without structural purposes. Proving the use of these composites in construction materials, especially for thread block or brick fences without structural purposes, without the need for cooking or heating energy project for the healing of parts, contributing to the environment and sustainability Environmental.
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Campbell, Tammy A. "Multi-attribute evaluation of materials for shielding enclosures subjected to a marine environment." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-08222009-040554/.
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Richter, Marina Juliane Verfasser], Alexander [Akademischer Betreuer] Böker, and Andrij Z. [Akademischer Betreuer] [Pich. "Synthesis of protein/mineral composite materials / Marina Juliane Richter ; Alexander Böker, Andrij Pich." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1130590445/34.
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Richter, Marina Juliane [Verfasser], Alexander Akademischer Betreuer] Böker, and Andrij Z. [Akademischer Betreuer] [Pich. "Synthesis of protein/mineral composite materials / Marina Juliane Richter ; Alexander Böker, Andrij Pich." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1130590445/34.
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Prechtel, Marina [Verfasser], and Günter [Akademischer Betreuer] Leugering. "Optimization of the crack resistance in composite materials = Optimierung der Risswiderstandsfähigkeit von Verbundwerkstoffen / Marina Prechtel. Betreuer: Günter Leugering." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2012. http://d-nb.info/1021570869/34.
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Nachtane, Mourad. "Énergies marines renouvelables et étude des performances des matériaux composites : cas d'une hydrolienne." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2019. http://www.theses.fr/2019ENTA0010.
Повний текст джерелаАнотація:
Les énergies marines renouvelables (EMR) apparaissent aujourd’hui comme une formidable opportunité et un véritable choix écologique et industriel pour répondre à la demande croissante de l’énergie et pour lutter contre le réchauffement climatique. Au cours de cette thèse, on se propose d’étudier l’un de ces types qui s’appelle l’énergie hydrolienne qui présente un immense potentiel dans le bouquet énergétique mondial. une nouvelle forme de pale d’une hydrolienne à axe horizontale a été développé par l’optimisation d’un hydrofoil existant en utilisant la méthode BEM (Blade Element Momentum) afin d’améliorer ses performances hydrodynamiques. La deuxième partie a été consacrée à étudier les performances mécaniques des matériaux composites comme composants structurels des pales d’hydrolienne et de la tuyère. Ces structures sont sujettes à de nombreux types de chargements, tels que les impacts de corps externes, la fatigue due à la variation des courants, mais également à diverses agressions liées à l’environnement marin telles que la variation de la température et l’humidité qui peuvent induire du vieillissement et de la corrosion. Une compréhension approfondie du comportement à long terme de ces parties mobiles est donc essentielle afin de doter les bureaux d’études, confrontés au dimensionnement des structures d’énergies marines, d’outils leur permettant de faire le choix des matériaux (couplefibre/matrice), architectures fibreuses (nappe, tissus), séquence d’empilement des stratifiées minimisant la sensibilité aux chargements appliqués des structures travaillantes. L’objectif final de cette thèse est le développement d’outils et de méthodologies tant numériques qu’expérimentales capables de simuler l’impact du courant et du comportement de ces systèmes de façon couplée ce qui constitue un enjeu majeur de dimensionnement. En effet le but est d’identifier les voies d’optimisation qui permettront d’aller sur la phase commerciale avec un gain de LCOE (Levelized Cost of Energy) substantielRecently, Renewable Marine Energies (RME) has emerged as a tremendous opportunity for a real ecological and industrial choice to meet the growing demands for energy and also to fight global warming. The study conducted in this thesis is with in this framework of research and is focused on the investigation of one of the most promising categories of RMEs which is tidal current turbine. A new hydrofoil for the turbine was designed using BEM (Blade Element Momentum) methods and CFD (Computational Fluid Dynamics) calculations with improved hydrodynamic efficiency. Furthermore, a series of numerical studies were conducted to investigate and examine the damage behavior of composite materials under critical loadings by developing DLOAD and VUMAT routines. This numerical study assisted in understanding the problems of structural lightening, resistance to fatigue and impact loading, and other degradation phenomena of themechanical properties of a composite turbine in severe marine environments and solving the needs of the manufactures. Moreover, study about the dynamic behavior of a composite/composite bonded assembly was also conducted because joint assembly plays a vital role in reducing the mass of the structure which is of extreme relevance in the field of marine and offshore structures. Another important obstacle regarding the application of composite and bonded structures in marine was the control of hygro-mechanical coupling. Therefore in this context, additional campaign of tests was carried out on bonded composite specimens by studying the hygrothermal effect on their dynamic behavior at different deformation rates using Hopkinson bar method. This hybrid study of hygro-thermal effect of the dynamic properties of the bonded composites will aid in optimization of the structures and to move into the commercial phase with a substantial gain in LCOE (Levelized Cost of Energy) in future
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Giaccobi, Stéphane. "Méthode de conception de multimatériaux à architecture multicouche : application à la conception d’une canalisation sous-marine." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13829/document.
Повний текст джерелаАнотація:
Les méthodes de sélection de matériaux monolithiques peuvent conduire à des impasses lorsque les exigences fonctionnelles sont très élevées ou contradictoires. Le passage aux multimatériaux peut alors être envisagé. L’objectif de la thèse est de proposer une méthode de conception de multimatériaux à architecture fixée, avec en perspective une application à la conception de conduites offshore pour le génie pétrolier. Seuls les multimatériaux à architecture multicouche sont considérés et la méthode de conception est redéfinie comme une méthode de sélection des constituants du multimatériau et de dimensionnement. Une adaptation des étapes classiques de sélection des matériaux conduit à présenter la méthode en détail sur des exemples simples. Les techniques de programmation par satisfaction de contraintes s’avèrent nécessaires pour la résolution de cas réels de conception multimatériaux. L’application à la conception de conduites offshore permet de valider la méthode et de démontrer sa pertinenceWhen the design requirements are either too stringent or are conflicting, no monolithic material solution exists. In such cases the selection of a multimaterial could be considered. The primary aim of this thesis is to provide a methodology for designing multi-materials with a prescribed arrangement of the constituent materials. The second objective is to apply this new methodology to the design of a submarine pipeline. From amongst the huge variety of multi-material arrangements available, this study focusses on multilayered stackings and therefore the design methodology becomes a method for selecting the materials of the stack and sizing the layers. This original approach is presented in detail using basic examples in order to match the steps of classical methods for selecting engineering materials. The constraints programming techniques were very useful for solving real multimaterial design problems. Applying this new method to the design of a submarine pipeline permits its validation and provides proof of its relevance
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Ros, William. "Modélisation Multi-échelle de l'infiltration chimique à partir de la phase vapeur de composites à renforts fibreux." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00669342.
Повний текст джерелаАнотація:
La matrice des composites thermostructuraux est obtenue par infiltration chimique en phase vapeur : une préforme placée dans un four est pénétrée par des gaz précurseur qui vont déclencher la formation matricielle par réaction hétérogène. Une modélisation numérique de ce procédé est proposée. Deux programmes furent développés puis validés. Le premier est dédié au calcul des propriétés effectives de la préforme à l'échelle de la fibre tandis que second les exploite propriétés pour accomplir une infiltration macroscopique. Ils s'appuient sur des algorithmes de marche aléatoire et requièrent des images 3D de la préforme. Dans cette optique, plusieurs tomographies de préformes ont été acquises aux deux échelles d'intérêt. Par cette méthode, l'étude des prévisions de densification de composites SiC/SiC a permis de comparer leur infiltrabilité. De plus, l'outil développé, combiné à un modèle chimique, simule l'infiltration de composites C/C et anticipe la microtexture de la matrice déposée.
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Rusu, Marin Viorel [Verfasser]. "Composite materials made of chitosan and nanosized apatite : preparation and physicochemical characterization / von Marin Viorel Rusu." 2004. http://d-nb.info/974306916/34.
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