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| Registros recuperados: 53 | |
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| Lelan, J; Parneix, P; Gueguen, P. |
| Composite materials offer many advantages for the construction of metal hull ships' superstructures (lower weight, higher resistance to fire compared to aluminium alloy, integration of specific functions to the material ...). DCN Lorient has the most of these characteristics to build the "La Fayette" class frigate superstructures. This paper discusses the developments that were undertaken for the choice and validation of the technical solutions retained and particularly the connection to a metal hull. The difficulties to be resolved during the manufacturing and assembly of the superstructures on board the prototype are also discussed. This concept can be applied to other types of ships with metal hulls, by adapting the technological choices to the design... |
| Tipo: Text |
Palavras-chave: Joints; Ship design; Ships; Ship technology; Composite materials; Assemblage acier/composite; Composite; Navire; Superstructure. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1067.pdf |
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| Darold, L; Blanco, E. |
| One of the major defects that can be found on composite sandwich structures is poor bonding of the core on the exterior skins, particularly with the technique of bonding under vacuum. Therefore, we have looked at all the possible means of detecting these bonding defects, with two objectives: to be able to control integrally a piece of large dimensions, and to be able to control the piece in the course of manufacturing, that is to say after the bonding on the first skin. All of the non-destructive test methods now known have therefore been tested, and in particularly infrared thermography, ultrasonic control, and acoustic methods. This study, carried out in collaboration with the CETIM, the STCAN, Aerospatiale and other laboratories and companies without... |
| Tipo: Text |
Palavras-chave: Adhesion; Ship technology; Composite materials; Contrôle non destructif; Structure sandwich. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1049.pdf |
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| Baley, Christophe; Gomina, Moussa; Breard, Joel; Bourmaud, Alain; Drapier, Sylvain; Ferreira, Manuela; Le Duigou, Antoine; Liotier, Pierre Jacques; Ouagne, Pierre; Soulat, Damien; Davies, Peter. |
| The use of composite materials reinforced by flax fibres has been increasing steadily over the last 20 years. These fibres show attractive mechanical properties but also some particularities (naturally limited length, presence of a lumen, fibres grouped in bundles in the plant, complex surface properties and composition). An analysis of the available literature indicates that the quality of the composite materials studied is not always optimal (high porosity, incomplete impregnation, heterogeneous microstructure, variable fibre orientation). This paper reviews published data on the specific nature of flax fibres with respect to manufacturing of biocomposites (defined here as polymers reinforced by natural fibres). All the important steps in the process... |
| Tipo: Text |
Palavras-chave: Composite materials; Biocomposite; Flax fibre; Polymer; Processing. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00473/58429/61027.pdf |
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| Taby, J; Hoyning, B. |
| Knitted multiaxial reinforcement are today more and more commonly used in the production of marine vessels. This is due to superior strength compared to traditional reinforcements such as woven roving and chopped strand mat. Strength properties in different resins are documented, and multiaxial and woven reinforcements are compared. Special attention is paid to interlaminar properties, and it is apparent that no intermediate layers of chopped strand mat are necessary when using multiaxial reinforcement. Methods of analysis are discussed, the influence of fibre orientation on strength and stiffness of structures is described, and a case study reveals considerable weight and cost saving potential. |
| Tipo: Text |
Palavras-chave: Ship technology; Ship design; Composite materials; Matériaux composites; Renforts multiaxiaux; Tissus cousus. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1061.pdf |
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| Barnouin, Bruno; Renaud, P. |
| The main conclusions drawn from examinations made by an expert over the last twelve years on boats in the Bay of Arcachon, including both motor and sailing boats, are presented. The different types of damage most frequently observed in different areas of the boats are described, with distinctions made between superstructures, areas below the water-line and other components. The damage is defined, common repair methods are described and simple design modifications to avoid the problems are discussed. In conclusion, it is apparent that the problems related specifically to aging of the material are rare or very rare. With improved fabrication methods and mastery of the design process in-service experience fully justifies the position of composite materials as... |
| Tipo: Text |
Palavras-chave: Motor boats; Inspection; Accidents; Yachts; Damage; Ship technology; Composite materials; Plaisance; Réparation; Accident; Dommage; Avarie. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1066.pdf |
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| Registros recuperados: 53 | |
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