Encontrados 8 documentos, a visualizar página 1 de 1
Impact strength of composites with nano-enhanced resin after fire exposure
Reis, P. N. B.; Ferreira, J. A. M.; Zhang, Z. Y.; Benameur, T.; Richardson, M. O. W.Composite materials have been widely used in several engineering applications. However, there are very few studies about the effects of nanoclays on the impact strength of laminates after exposure to the fire. Therefore, this paper intends to study this subject and the impact performance was analysed by low velocity impact tests carried out at different incident impact energy levels. For better dispersion and i...
Effects of alkaline and acid solutions on glass/epoxy composites
Amaro, A. M.; Reis, P. N. B.; Neto, M. A.; Louro, C.Composite structures can be exposed to a range of corrosive environments during their in-service life, which causes degradation in terms of material properties. The effect of alkaline and acid solutions on the GRP mechanical properties can be found in open literature, but the studies presented are not sufficient to establish a full knowledge of this subject. In this paper the flexural properties and the impact ...
Fatigue life evaluation for carbon/epoxy laminate composites under constant and...
Reis, P. N. B.; Ferreira, J. A. M.; Costa, J. D. M.; Richardson, M. O. W.http://www.sciencedirect.com/science/article/B6TWT-4TN82M4-1/2/ffb1a17eaf7390463ad097c3ba5d4e8f
Flexural behaviour of hybrid laminated composites
Reis, P. N. B.; Ferreira, J. A. M.; Antunes, F. V.; Costa, J. D. M.The present paper studies the flexural behaviour of hand manufactured hybrid laminated composites with a hemp natural fibre/polypropylene core and two glass fibres/polypropylene surface layers at each side of the specimen. When compared with full glass fibres reinforced polypropylene laminates, the hybrid composites have economical, ecological and recycling advantages and also specific fatigue strength benefits...
Influence of superposition length on mechanical resistance of single-lap adhesi...
Reis, P. N. B.; Antunes, F. J. V.; Ferreira, J. A. M.The present work studies the mechanical behaviour of single-lap joints of PP reinforced with glass fibres. Failure loads were obtained experimentally for different superposition lengths (15, 30, 45 and 60 mm). A 2D numerical analysis was developed using the finite element method, and assuming a plane strain state, an orthotropic behaviour for the laminates and an elastic-plastic behaviour for the adhesive. It w...
Fatigue behaviour of composite adhesive lap joints
Ferreira, J. A. M.; Reis, P. N.; Costa, J. D. M.; Richardson, M. O. W.http://www.sciencedirect.com/science/article/B6TWT-45YG5WP-1/1/d57bc6251d123772bfdb57edd6cc3916
Analysis of fatigue and damage in glass-fibre-reinforced polypropylene composit...
Ferreira, J. A. M.; Costa, J. D. M.; Reis, P. N. B.; Richardson, M. O. W.This paper concerns fatigue studies of polypropylene/glass-fibre thermoplastic composites produced from a bi-directional woven cloth of co-mingled E-glass fibres and polypropylene fibres with a fibre volume fraction Vf of 0.338. The effect of lay-up design and load conditions on fatigue performance were investigated. The S-N curves, the rise in the temperature of the specimens, and the loss of stiffness during ...
Static and fatigue behaviour of glass-fibre-reinforced polypropylene composites
Ferreira, J. A. M.; Costa, J. D. M.; Reis, P. N. B.This paper is concerned with fatigue of polypropylene/glass-fibre thermoplastic composites produced from a bi-directional woven cloth mixture of E glass fibres and polypropylene fibres. The latter becomes the matrix after the application of heat and pressure. This composite was manufactured with a fibre volume fraction Vf of 0.338. The effect of layer design on the static and fatigue performance was investigate...
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