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Aspects de conception et de construction d'un bateau d'assaut en composites ArchiMer
Kader, A; Yaakob, O; Samian, Y.
To help spur the defence industry in Malaysia, the Government is encouraging indigenous research and development effort. This paper describes the development of a prototype fibreglass assault boat at the Universiti Teknologi Malaysia. The boat, designed for riverine and coastal water operations was modelled on aluminium boats currently used by the Malaysian Armed Forces. The completed boat has been evaluated and some minor modifications will be made on the final prototype to be built soon.
Tipo: Text Palavras-chave: Malaysia; Ship technology; Fibre glass; Ship design; Glass reinforced plastics; Composite materials; Conception; Fibre de verre; Construction; Bateau d'assaut.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1057.pdf
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Evaluation expérimentale et théorique du comportement de panneaux de superstructures en composites ArchiMer
Damonte, R; Iaccarino, R; Puccini, G; Rizzuto, E; Tedeschi, R.
Composite materials represent for shipbuilding industries a possible way to improve the competitiveness of products, particularly in the field of high technology vessels where high strength and stiffness to weight ratios allow increased payload capacity to be obtained, improved performances and lower propulsion costs. In fact with these materials the designer can obtain considerable saving in structural weights, easier production and assembly techniques for complex shapes structures, and better long term performances of the structures when exposed to the marine environment. Unfortunately potentially wide application of F.R.P. structures is restrained by a general lack of knowledge on the mechanical and physical behaviour of these structures. In this...
Tipo: Text Palavras-chave: Evaluation; Ship design; Numerical analysis; Glass reinforced plastics; Ship technology; Composite materials; Etude expérimentale; Etude numérique; Panneaux sandwich; Superstructures navales.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1085.pdf
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Evolution des propriétés mécaniques de matériaux composites verre/polyester gelcoates en milieu marin ArchiMer
Castaing, P; Tsouvalis, N; Lemoine, Lionel.
Glass-fiber reinforced polyester composites with gelcoat are widely used in nautical construction despite the lack of knowledge concerning their durability when immersed in water. This study deals especially with the influence of the osmotic process of degradation on the evolution of the mechanical properties of orthotropic materials, subjected to accelerated ageing tests. This evolution is experimentally evaluated by performing a non destructive test procedure, the vibrational modal analysis, whose results are additionally confirmed by quasi-static mechanical tests (bending and shear). Although gelcoat blistering has no effect on the mechanical properties of the structure, considerable changes are observed in the elastic moduli and in the ultimate...
Tipo: Text Palavras-chave: Osmosis; Aging; Mechanical properties; Glass reinforced plastics; Fibre glass; Composite materials; Durabilité; Propriétés mécaniques; Analyse modale; Osmose; Vieillissement; Gelcoat; Polyester; Matériau composite.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1058.pdf
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La conception de structures navales en sandwich: Un probleme inverse ArchiMer
Holm, D; Esping, B; Romell, O; Campion, F.
An integrated approach is introduced for the solution of the inverse problem: which are the lamina orientation, laminate constitution, core quality and thickness combination ensuring specified objective(s) to be reached? The optimal solution is obtained using mathematically stringent optimization methods (the Method of Moving Asymptotes, MMA) coupled with finite element analysis, interactive graphic pre- and post-processing and parametric modelling, as implemented in OASIS-ALADDIN. This approach has been applied to the optimal design of the hull structure of a Surface Effect Ship made of GRP-sandwich. The objective was to minimize the weight of the ship by determining the optimum skin and core thicknesses of structural members of the hull as well as web...
Tipo: Text Palavras-chave: Finite element method; Glass reinforced plastics; Ship hulls; Safety devices; Ship technology; Ship design; Composite materials; Sandwich; Composite; Problème inverse; Sensibilité; Optimisation.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1054.pdf
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La construction navale optimisée. Le choix de matériaux d'âme et la fabrication sont étroitement liés ArchiMer
Gellhorn (von), E; Mittelmann, G.
Sandwich panels with a facing of laminated fibre reinforced plastics are now established boatbuilding materials. In the last few years they have begun to replace the traditional metal and wood in ship and marine construction. Today's materials are usually selected on the basis of minimum cost and simplicity of construction. This is often contrary to the demands of the owner who wants an inexpensive, safe, easy-care and long-lasting ship. The requirements of boatbuilder and operator can easily be satisfied if the combination of the best choice of materials and new, rationalized construction methods are considered. Taking the construction of the boat "Sandwich" as an example we will demonstrate the increased importance of the tough rigid linear PVC foam core...
Tipo: Text Palavras-chave: Costs; Ship technology; Ship design; Glass reinforced plastics; Composite materials; Coûts; Production; Sandwich PVC linéaire; Ame.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1063.pdf
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Testing the effectiveness of tough resin systems for improving structural performance of joints in GRP ships. ArchiMer
Norwood, L; Caulier, C.
A major concern in any composite structure is its ability to resist peel and shear loading; this becomes a more difficult problem where long delays in laminating have occurred or when dissimilar materials are joined together. In the case of mine countermeasure vessels, adhesion between stiffener and hull becomes critical when the ship is subjected to underwater shock loading. In order to reduce costs and improve the hull-stiffener bond, tough resin systems based on urethane acrylates have been developed to replace the mechanical crack-stopping system currently employed. This paper describes the benefits of urethane acrylates in the frame-hull application discussing the level of improvement over the mechanical system.
Tipo: Text Palavras-chave: Ships; Adhesion; Joints; Shear; Ship technology; Glass reinforced plastics; Materials testing; Composite materials; Urethane acrylate; Raidisseur; Coque; Fixation; Joint.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1043.pdf
Registros recuperados: 6
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