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Registros recuperados: 5
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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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Etude du vieillissement de composites verre resine en milieu marin ArchiMer
Gutierrez, J; Lelay, F; Hoarau, P.
Evolution of glass fibre-resin composites (polyester, epoxy and vinylester) after 30 years in a marine environment has been anticipated by the compilation of the Naval Construction Direction test results. This study showed that 120 degree C epoxy prepreg, in spite of improved initial performance, was more affected by water environment aging than other composites. Post-curing of epoxy and vinylester composites does not significantly improve resistance to water degradation except in the case of high temperature aging (60-70 degree C).
Tipo: Text Palavras-chave: Ship technology; Age; Aging; Composite materials; Fibre glass; Vieillissement accéléré; Vieillissement naturel; Composite verre résine.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1056.pdf
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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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Applications de la thermographie infrarouge au controle non destructif des materiaux composites utilises en construction navale ArchiMer
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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La conception structurale preliminaire de navires en ames sandwich ArchiMer
Previte, C.
Fiberglass laminate design is of deep concern to marine designers and engineers. This presentation summarizes the topic of core selection for marine structures. It provides a schematic approach to de-complicating laminate design, reviews the attributes of different types of Polimex cores and outlines the principal causes of sandwich failure. For sake of brevity engineering analysis and formulas have been greatly abbreviated.
Tipo: Text Palavras-chave: Deterioration; Failures; Composite materials; Ship design; Ship technology; Fibre glass; Rupture; Conception; PVC; Sandwich.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1059.pdf
Registros recuperados: 5
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