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Damage resistance of composites based on glass fibre reinforced low styrene emission resins for marine applications ArchiMer
Perrot, Yves; Baley, C; Grohens, Y; Davies, Peter.
Composites based on glass fiber reinforced low styrene emission polyester resins have been widely used over the last 10 years, in order to meet increasingly strict safety regulations, particularly in the pleasure boat industry. Previous studies of their mechanical properties suggested that although these resins are generally more brittle than traditional orthophthalic polyester resins this did not adversely affect the properties commonly used for quality control (short beam shear and tensile failure strength of mat reinforced composites). In the present paper results from a more detailed study of damage behaviour are presented. Tests include fracture toughness (K (Ic) ) tests on resins, fibre/matrix interface energy, detection of composite damage...
Tipo: Text Palavras-chave: Interface properties; Damage initiation; Styrene emission; Unsaturated polyester; Glass fibers.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2316.pdf
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Influence des propriétés de la matrice sur le comportement mécanique de matériaux composites verre/polyester utilisés en construction navale de plaisance - Cas des résines polyester limitant les émissions de styrène ArchiMer
Perrot, Yves.
The work performed in this study is concerned with the characterization of glass/polyester composites for the pleasure boat industry. In particular the properties of polyester resins limiting styrene emissions have been evaluated. Physico-chemical and mechnanical tests were first performed in order to understand the roles played by the constituants (matrix, fibres and fibre/matrix interface). Then a study of damage mechanisms, delamination and impact resistance, was carried out on composite specimens. Durability and the influence of the marine environment was also examined through two parameters, temperature and sea water aging. Finally the transfer from material to structure was illustrated through three aspects : the influence of fabrication...
Tipo: Text Palavras-chave: Damage; Mechanical properties; Low styrene emission resins; Composite materials; Plaisure boat industry; Endommagement; Propriétés mécaniques; Résines limitant les émissions de styrène; Matériaux composites; Construction navale de plaisance.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-2485.pdf
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Mechanical properties of composites based on low styrene emission polyester resins for marine applications ArchiMer
Baley, Christophe; Perrot, Yves; Davies, Peter; Bourmaud, Alain; Grohens, Yves.
Glass fibre reinforced polyester composites are used extensively for hulls and decks of pleasure boats. Boat-builders must optimise manufacturing technology, not only with respect to mechanical properties but also limiting volatile organic compounds (VOC) emissions. One way to achieve this is through modified polyester resin formulations such as low styrene content, low styrene emission or combinations of these. The resin matrix selection procedure is based on design specification (mechanical behaviour) but also manufacturing requirements and cost considerations. For this application post-cure is rarely used so it is important to optimise curing conditions. In this study the influence of the curing cycle on mechanical properties was examined first for two...
Tipo: Text Palavras-chave: Mat; Unidirectional; Glass fibres; Styrene emission; Mechanical properties; Transverse tensile; Unsaturated polyester; Composite materials.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2320.pdf
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Seawater ageing of low styrene emission resins for marine composites: Mechanical behaviour and nano-indentation studies ArchiMer
Maurin, Romain; Perrot, Yves; Bourmaud, Alain; Davies, Peter; Baley, Christophe.
Polyester resins are widely employed for pleasure boat construction. In order to satisfy new environmental legislation on styrene emissions resin suppliers have proposed modified formulations, but these show lower failure strains under tensile loading. This paper examines the influence of wet ageing on mechanical properties of low styrene polyester, together with standard polyester and vinyl ester resins, and their glass reinforced composites. Results are presented from accelerated ageing in natural sea water for nine months, at temperatures of 20, 40 and 60 degrees C. Nano-indentation was used to study local changes in the resin after ageing. The diffusion kinetics of the low styrene emission resins and their composites are similar to those for standard...
Tipo: Text Palavras-chave: Polymer matrix composites (PMCs); Environmental degradation; Mechanical testing.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11104/7856.pdf
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Transverse tensile behaviour of unidirectional plies reinforced with flax fibres ArchiMer
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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