Glass fibre-epoxy composite

Finally, a word about the fracture properties of poly(p-benzamide) fibre. Not unexpectedly it appears that the extreme axial properties of the fibre have to be paid for in terms of very poor transverse properties. Indeed the higher the modulus the greater is the tendency for the fibre to exhibit a failure mode consisting of fibrillation and splintering. Words cannot describe this as well as the Stereoscan photograph (Fig. 10) and Fig. 11 which compares fracture surfaces in a glass fibre-epoxy composite (a) and a poly(p-benzamide)-epoxy composite (b) prepared in the authors laboratories. 

Glass Fibre-Epoxy Composite Leaf Spring... 

Olmos D, Lopez-Moron R, Gonzalez-Benito J (2006) The nature of the glass fibre surface and its effect in the water absorption of glass fibre/epoxy composites. The use of fluorescence to obtain information at the interface. Compos Sci Technol 66(15) 2758-2768 Summon C, Mura C, Yarwood J, Everall N, Swart R, Hodge D (1998) FTIR — ATR studies of the structure and dynamics of water molecules in polymeric matrixes. A comparison of PET and PVC. J Phys Chem B 102(18) 3402-3411... 

Husman GE (1976) Characterization of wet composite materials. Presented at the mechanics of composites review, Bergamo Center, Dayton, 28-29 January 1976 Imielinska K, Guillaumat L (2004) The effect of water immersion ageing on low-velocity impact behaviour of woven aramid-glass fibre/epoxy composites. Compos Sci Technol 64... 

A unidirectional glass fibte/epoxy composite has a fibre volume fraction of 60%. Given the data below, calculate the density, modulus and thermal conductivity of the composite in the fibre direction. 

Like other composite properties, the wear resistance is influenced by the orientation of reinforcing fibres. Sung and Suh found that with biaxially-oriented glass fibre and molybdenum disulphide in a PTFE matrix (Duroid 5813), the wear resistance was greatest when the highest proportion of fibre was normal to the sliding surface. The same effect was found with a graphite fibre/epoxy composite and a Kevlar fibre/epoxy composite. 

Kietsis G, Matthews FL. The strength of bolted joints in glass fibre/epoxy laminates. Composites 1985 16 92-105. 

Fig. 11. Fracture surfaces ( x200) of fibre-epoxy composites using (a) glass fibre, (b) heat treated poly (p benzamide) fibre.

Marsden W, Boniface L, Ogin SL, Smith PA. Quantifying damage in woven glass fibre/ epoxy laminates. In Proceedings FRC 94, sixth international conference on fibre reinforced composites, Newcastle upon Tyne. Institute of Materials 1994. paper 31,31/1-31/9. 

Model composites of Kevlar-49 and D-glass fibre/ epoxy systems were analysed using FTIR micro-... 

Epoxidised allyl soyate resin (a mixture of epoxidised fatty acid esters) copolymerised with the base Shell Epon epoxy resin is used as matrix for glass fibre reinforced composite, which is prepared using a Durapul 6000 Labstar Pultrusion machine. The lubricating quality of soybean oil-based resin significantly reduces the pulling force which improves the structural performance characteristics of the composites. Curing is carried out in an oven at 80°C for one hour, followed by heating to 177 C for 1.5 h. 

Figure 6.7 Loss factor versus temperature plots of glass fibre-reinforced composites based on epoxies of different functionalities as matrices...

Figure 6.9 Effects of incorporation of HBP on the T of modified epoxy in castings and glass fibre-reinforced composites. Reprinted with permission from D. Ratna, Composites A, 2008, 39, 462. 2008, Elsevier Publishing Company...

One of the first Pulse Stream generators was the 100 kW test rig situated in the Humber estuary, which currently feeds power into a chemicals company on the banks of the river. The shells of the blades of one of these Pulse Stream 100 tidal generators were manufactured in glass fibre/epoxy polymer composites the spar was fabricated in carbon fibre/epoxy polymer composites. The spar, which is thick compared with the shell, was manufactured by the infusion technique, but for subsequent generators the prepreg technique will be used to make the spars. Figure 10.8 shows the Pulse Stream 100 tidal generator. 

Thermoset plastics are undamaged by the liquid adhesive, and these include Glass fibre polyester composite. Epoxies, Polyurethanes, and Bakelite materials based on phenolic resins. 

Sheard PA, Jones FR (1986) The stress corrosion of glass fibres andepoxy composites in aqueous environments. In Loo TT, Sun CT (eds) Proceedings of the international symposium on composite materials and structures, Beijing, 10-13 June 1986, pp 118-123 Suh D, Ku M, Nam J, Kim B, Yoon S (2001) Equilibrium water uptake of epoxy/carbon fiber composites in hygrothmnal environmental conditions. J Compos Mater 35(3) 264-278 Tucker WC, Brown R, Russell L (1990) Corrosion between a graphite lymta- cmnposite and metals. J Compos Mater 24(1) 92-102... 

Kornmann X, Rees M, Thomann Y, Necola A, Barbezat M and Thomann R (2005) Epoxy-layered silicate nauocompoates as matrix in glass fibre-reinforced composites, Compos Sci Technol 65 2259-2268. 

Polymer-matrix composites for aerospace and transport are made by laying up glass, carbon or Kevlar fibres (Table 25.1) in an uncured mixture of resin and hardener. The resin cures, taking up the shape of the mould and bonding to the fibres. Many composites are based on epoxies, though there is now a trend to using the cheaper polyesters. 

Example 3.1 The density of a composite made from unidirectional glass fibres in an epoxy matrix is 1950 kg/m. If the densities of the glass and epoxy... 

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