Consulta: subjectFacets:"Polyester"
Registros recuperados: 4
Data/hora: 05/06/2024 03:29:19

A non-linear viscoelastic viscoplastic model for the behaviour of polyester fibres
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chailleux, Emmanuel; Davies, Peter.
In this study the macroscopic analysis proposed by Schapery has been applied to model the non-linear viscoelastic and viscoplastic behaviour of polyester fibres. First, a special non-contact extensometry method has been developed in order to measure the fibre response without affecting the behaviour of these extremely anisotropic fibres. An accelerated identification method has then been developed. This enables a unique and independent set of parameters to be determined, which separate the reversible and non-reversible mechanisms responsible for measured strains. The model prediction for an arbitrary loading sequence corresponds closely to the measured strains. The model has been applied here at the yarn level but can equally well be used to predict rope...
Tipo: Text
Palavras-chave: Viscoplastic; Viscoelastic; Polyester; Non linear; Model; Fibre.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-794.pdf

Evolution des propriétés mécaniques de matériaux composites verre/polyester gelcoates en milieu marin
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Transverse tensile behaviour of unidirectional plies reinforced with flax fibres
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Distribution and biodegradability of polyester degrading microorganisms isolated from soils in Thailand
Provedor de dados: Thai Agricultural Research Repository
Autores: Jarerat, A.; Kittinapakul, K.; Sriroth, K.; Tokiwa, Y.
Palavras-chave: Biodegradability; Polyester; Thailand; Microorganisms.
Ano: 1998
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4834