Glass fibres continuous

A reinforced plastic sheet is to be made from a matrix with a tensile strength of 60 MN/m and continuous glass fibres with a modulus of 76 GN/m. If the resin ratio by volume is 70% and the modular ratio of the composite is 25, estimate the tensile strength and modulus of the composite. 

A filament wound composite cylindrical pressure vessel has a diameter of 1200 mm and a wall thickness of 3 mm. It is made up of 10 plies of continuous glass fibres in a polyester resin. The anangement of the plies is [O3/6O/ — 60],. Calculate the axial and hoop strain in the cylinder when an internal pressure of 3 MN/m is applied. The properties of the individual plies are... 

A polyester matrix is reinforced with continuous glass fibres. A 15 mm wide beam made from this material is to be simply supported over a 300 mm length and have a point load at midspan. For a fixed beam weight of 90 g/m investigate how the stiffness of the beam changes with the volume fraction of glass and state the optimum volume fraction, (p/ = 2560 kg/m. p , = 1210 kg/m Ef = 76 GN/m = 3 GN/m ). 

Mat and continuous glass fibre reinforcements theoretically all the thermoplastics are usable in these forms, but up to now developments have concentrated on polypropylenes (PP), polyamides (PA) and thermoplastic polyesters (PET) fibre-reinforced PEEK, polyetherimide (PEI) and polyphenylene sulfide (PPS) are used for high-performance applications. They are presented in a range of forms from stampable sheets to pellets, prepregs, ribbons, impregnated or coated continuous fibre rods. More rarely (as in the case of PA 12, for example), the thermoplastic is provided in liquid form. 

The mat and continuous glass fibre reinforced grades have specific uses ... 

Technical advantage/function Basalt rock wool is used for noise insulation in automotive exhaust units for the purposes of noise absorption. Vital technical requirements are temperature resistance, noise absorption behaviour, corrosion resistance and mechanical stability. Now textile continuous glass fibres and biosoluble mineral wools are also used for this application in exhaust units. 

A new technology, based on impregnating continuous glass fibres with an extruded low viscosity PVC melt and subsequent application via the extrusion die of a standard PVC extrudate, has given PVC profiles with a 500% increase in stiffness (201). 

Loewenstein K. L., The Manufacturing Technology of Continuous Glass Fibres, Elsevier, Amsterdam, 1973. 

O. Weichold, M. Moller Development of a cement-in-polymer dispersion for improved adhesion in continuous glass-fibre reinforced concrete. 1. Aachen-Dresden Textiltagung, Aachen, 29.-30. Nov. 2007... 

Advanced Coatings to Improve the Durability in Continuous Glass-Fibre... 

Thermoforming is another mass production method normally associated with unreinforced or short fibre reinforced thermoplastics, but because of recent developments in reinforced plastics technology, discussed below, there is a greater availability of thermoplastics sheet reinforced by long or continuous glass fibres, so it may become more important for these materials as well. 

Van Den Oever, M Peijs, T. (1998). Continuous-Glass-Fibre-Reinforced Polypropylene Composites II. Influence of Maleic-Anhydride Modified Polypropylene on Fatigue Behaviour. Composites Part A Applied Science and Manufacturing, Vol.29, No.3, pp. 227-239 ISSN 1359-835X... 

The spray-up machine consists of a gun for spraying catalysed/accelerated resin and a unit which chops continuous glass fibre. They are simultaneously sprayed on to an open mould coated with a releasing agent. The laminate is rolled and then allowed to cure, after which the moulding is released and trimmed to size. The properties and applications are similar to hand lay-up but the use of the spray machine produces a much faster lamination time. 

Continuous glass fibre (roving) is chopped in the chopper unit of the spray gun by the action of a rotating blade against a polyurethane roller. The resulting chopped strands are blown from the gun by the exhaust from the air motor which drives the chopper. Concurrently resin is sprayed from the gun and the streams of resin and chopped glass fibre meet approximately at the mould surface. 

K. L. Loewenstein, The manufacturing technology of continuous glass fibres, third, completely revised edition, Elsevier, Amsterdam (1993). 

Which processing route(s) enable(s) industrial production of long or continuous glass fibre compounds/composites ... 

Continuous glass-fibre filaments are laid down in a swirl pattern to form a mat. The filaments are loosely held together with a resinous binder. 

Rausch J, Mader E. Health monitoring in continuous glass fibre reinforced thermoplastics manufacturing and apphcation of interphase sensors based on carbon nanotubes. Compos Sci Technol 2010 70(11) 1589-96. 

Rausch, J., Mader, E., 2010. Health monitoring in continuous glass fibre reinforced thermoplastics tailored sensitivity and cyclic loading of CNT-based interphase sensors. Composites Science and Technology (70), 2023—2030. 

Crank case and chain case were made in epoxy, reinforced with a continuous glass fibre random mat, which gives a largely isotropic structure. 

Loewenstein, K.L., The Manufacture of Continuous Glass Fibres— Present Trends in the Use of Platinum Alloys , Platinum Metals Review, 19, 82-87, 1975. 

M. Hou and K. Friedrich, Resistance welding of continuous glass fibre-reinforced polypropylene composites. Compos Manuf, 3(3), 153-163, 1992. 

---