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| CHIM0064-3 | Matériaux aérospatiaux (composites)
[ english version ]
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| Durée : | 30h Th | |||||
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| Crédits/ECTS : |
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| Titulaire(s) : | Jean‑Marie Liégeois | |||||
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| Aperçu général : | The reasons for composites. The relation between theoretical strength and modulus of solids. The zero flaw approach of engineering materials. Introduction to reinforcing fibres, definition, common features. Description of glass fibres, manufacturing process, surface finish, composition and properties related to the selected applications. Chemical stability. History of carbon and graphite fibres. Manufacturing process, classes and properties. Emphasis on differences between glass and carbon fibres. Description and properties of organic fibres : aramids and gel spun HDPE. Quick review of other inorganic fibres : whiskers, ceramics, and boron. Introduction to the main types of textile construction. The matrix resin for organic composites. Description of chemical moieties and polymerization reactions. Structure properties relationship of neat resins. Description of the technological routes for composite processing. Part size, geometry, performances, series size, and costs chart discussion. Detailed presentation of the physico-chemical properties and chemorheology of high Tg aerospace structural matrix resins. Prepreg, RTM, and infusion process, phenomena associated with post cure are presented. The ageing of laminates with emphasis on sensitivity to water absorption. Structural composites made by adhesive bonding : the theory and mechanisms of adhesion. Practical implementation of adhesive bonding. Application to sandwich fabrication and metal bonding with emphasis on aluminium surface preparation and bonding durability. Overview of geometrical properties, volume properties, and mechanisms of failure in composites. | |||||
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| Objectif du cours : | The course intends to provide the chemical engineer but more importantly the mechanical engineer with a good understanding of composite processing primarily of the physico-chemistry aspects of it. | |||||
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| Pré-requis : | General physics and general chemistry | |||||
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| Travaux pratiques : | Formulating, casting, and curing high Tg neat resin and measuring Mode 1 fracture toughness. Preparing UD pultruded rods and measuring bending properties and assessing Young and shear moduli. Running 3PB DMTA on said rod. Hot melt prepreging and vacuum bagging of satin or taffeta laminate and measuring delamination properties G1c, G2c. | |||||
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| Organisation : | Lectures 4hr per week during Fall term | |||||
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| Notes de cours : | Course text-notes are partially available. All figures, graphs, and tables are available. Lab text-notes and necessary calibration curves are available. | |||||
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| Evaluation : | Oral examination following a written preparation of 2 questions at random. | |||||
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| Contacts : | jean-marie.liegeois@ulg.ac.be | |||||
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ULg : Administration de l'Enseignement et des Etudiants - Affaires Académiques
Responsable de l'information : Monique Marcourt, direction A.E.E.
Date de validité des données : 27/02/2006
Réalisation SEGI