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| Registros recuperados: 53 | |
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| Hildebrand, M. |
| The material properties of over 50 different laminates made by a group of Finnish boat-yards have been measured in a large test project. Tension, compression, bending, interlaminar shear and impact tests have been carried out for all the laminates. Among others, different polyester resins, different woven and non-woven fabrics, chopped strand mat and unidirectional roving were used as basic ply materials. The effect of various parameters has been determined not only on the maximum failure strength, but also on the strain level at which the first failure occurs. Main differences between the ratio of static and impact test results of the different materials have been determined. The results show that by choosing certain material parameters efficiently,... |
| Tipo: Text |
Palavras-chave: Strength; Ship technology; Composite materials; Résistance mécanique; Bateaux; Stratifiés; Matériaux composites. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1084.pdf |
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| 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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| Lemiere, Y. |
| Since the sixties, the amount of composite structures on submarines has increased continuously. The main reasons are their low apparent weight in water, good behaviour in a marine environment, excellent mechanical properties and acoustic transparency. The new applications required the use of prepreg. Relevant processes had to be adapted to the large dimensions and thickness of the structures. Future applications will be concerned with both structures and internal equipment. A lively debate is now in progress over whether the successor to high yield strength steels for hull structures will be titanium or composite materials. |
| Tipo: Text |
Palavras-chave: Submarines; Ship technology; Composite materials; Structure; Sous marin; Matériau composite. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1077.pdf |
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| Baley, C; Perrot, Yves; Busnel, F; Guezenoc, H; Davies, Peter. |
| Flax provides a renewable source of fibres with good mechanical properties, which justifies its use as a reinforcement for polymers. Composite materials made with flax which has only undergone mechanical treatments (stripping followed by combing) results in the presence of bundles of fibres. When a unidirectional flax/polyester ply is loaded in transverse tension the damage mechanisms are complex; cracks develop in the matrix, and at the fibre/matrix interface, but they also appear within the fibres themselves and in the lamellae within the fibre bundles. This emphasises the highly anisotropic nature of these flax fibres, whose average longitudinal Young's modulus is 59 GPa and whose transverse modulus is estimated here to be 8 GPa. (c) 2006 Elsevier B.V.... |
| Tipo: Text |
Palavras-chave: Unidirectional; Transverse tensile; Polyester; Glass; Flax; Composite materials. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-6362.pdf |
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| Filippi, R. |
| A recent product, now five years old, Nidaplast is an extruded polypropylene honeycomb, coated on both faces by a non-woven polyester. Its widespread uses extend from public buildings including water treatment plants through to the composites industry. To all these cases the honeycomb structure brings its well-known physical and mechanical properties of lightness and strength. In addition, the flexible coating on the faces allows easy fabrication which is not the case for normal honeycombs. The polypropylene offers chemical inertness and non-toxicity. |
| Tipo: Text |
Palavras-chave: Ship technology; Ship design; Composite materials; Polypropylène; Ame; Sandwich; Nid d'abeille. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1070.pdf |
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| Devaux, H. |
| The mast-rigging combination of a yacht is the structural element which transmits the aerodynamic forces on the sails to the yacht's structure. This load transmission element is in general made up of a mast, a long, thin tube, and the rigging which is a collection of cables linking the mast to the deck. These elements are long, often longer than the hull, with a high centre of gravity and it is essential to obtain as low a mass as possible, both for safety and performance. This search for weight gain imposes the use of lighter and lighter materials: wood, then aluminium alloys and most recently, since the early 1980's, composite materials. The use of the latter is the subject of this paper. |
| Tipo: Text |
Palavras-chave: Composite materials; Deformation; Ship design; Ship technology; Eléments finis; Gréement; Mât; Flambement. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1078.pdf |
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| Lesbre, F; Potet, P; Artiga, F. |
| Composite materials used in naval construction use mainly glass fibres and fabrics and epoxy resins for monolithic structures and syntactic foams or balsa wood for the core of sandwich structures. Traditional non destructive testing (NDT) methods such as ultrasonics or radiography do not always ensure a complete check of the structure, principally due to the strong heterogeneity of these materials. In order to improve this situation the DCN has developed a test method based on the use of active infrared thermography. The technique consists of illuminating the structure with a powerful lamp and observing the cooling of the surface with an infrared camera. Defects present act as obstacles to heat transmission in the material and cause thermal anomalies on... |
| Tipo: Text |
Palavras-chave: Epoxy resins; Fibre glass; Ship technology; Composite materials; Sous marin; NDT; Infrarouge; Thermographie. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1050.pdf |
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| Registros recuperados: 53 | |
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