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Wood laminates must not be ignored by engineering firms
the polymer-filler interface in this case. The results of experiments using a low density polyethylene with CT FE and diamond filler particles support the three phase model. (70/4/74)
Now: Here are foam-glass composites Plastics Technology, Vol 16, No 2 (February 1970) A rigid type of composite formed of urethane foam and glass is described. It is produced by filling a filament wound glass cocoon with between 75 and 95% foam. No sizings or binders are required in the fabrication process. The material is reported as being useful for high-density moulded products. (70/4/75)
Pilkington puts £8 million into glass fibre growth The Engineer, p 7 (March 197@ The Pilkington company, Fibreglass expect the total UK market for glass reinforced plastics to increase from the present 47 000 tons/year to 150 000 tons by 1980 and the parent company is therefore investing £8 million in a factory for the production of glass fibre reinforcing material. Some of the expertise for such a venture will be provided via a tie up with OwensCorning Fibreglass who are the world's major manufacturer. (70/4/76)
polyester, and chopped glass fibre together with layers of glass mat and biaxially wound glass tape. The fabrication process is mechanized by means of rotating mould tables that are synchronized with a hydraulic work. platform that moves up and down. It is claimed that this system makes it possible to produce a 15 layer, 12 000 gallon tank in 3 sections in 8 working hours. (70/4/78)
Vosper Thorneycroft to build 153 ft mine hunter for the Royal Navy Reinforced Plastics, Vol 14, No 6, p 160 (February 1970) The article outlines the proposed manufacturing techniques which will be used to make what is thought to be the largest glass reinforced plastic vessel afloat anywhere in the world. The particular advantage of reinforced plastics for this application is their resistance to attack by sea water and marine organisms. The effort is aimed eventually at providing the basis of a hull for a new generation of mine counter measure ships. (70/4/79)
T.R.W. Systems of Redonds Beach California have developed a polyimide resin system which can be used to produce boron reinforced laminates with less than 2% voidage. The laminating varnish P 13N has 40% solids in dimethyl formamide solvent and can be partly cured on the reinforcement to produce a stable pre-preg. Heat and low pressure produce a reaction without the liberation of volatiles and the elimination of post curing is noteworthy. (70/4/77)
Exact solutions for rectangular bidirectional composites and sandwich plates PAGANO, N. J.
Journal of Composite Materials, Vol 4, pp 20 34 (January 1970) Three dimensional elasticity solutions are constructed for rectangular laminates with pinned edges. The lamination geometry treated consists of arbitrary numbers of layers which can be isotropic or orthotropic with material symmetry axes parallel to the plate axes. Several specific problems are solved, including a sandwich plate, and compared to the analogous results in classical laminated plate theory. (70/5/13)
Structures Honeycombs: ideal composites for a hive of industry
Wood laminates must not be ignored by engineering firms The Engineer, p 49 (March 1970)
HILL, P.
The Engineer, p 28 (February 1970) Polyimide resin system cuts voids in laminate The Engineer, p 11 (January 197@
particularly suitable owing to its resistance to swimming pool water. Laboratory tests, load standards and fabrication methods are described. Results of tests give the relation between load, length change and maximum deflection, from which the modulus of elasticity is calculated. About four floors have been constructed using such T-girders and some ten more are under construction at present. (70/5/12)
In a general review article the manufacture, properties and applications of honeycomb composites are described in an attempt to show how they can be tailor made to meet the requirements of industry. Their strength is attributed to their many I sections and their resistance to bending to the strongly bonded facings while graphically the shear strengths, strength retention at temperature and cost of G R P honeycombs are shown with the same properties for other honeycombs. The criteria for selection of core and facing materials are outlined and some examples of their w:rsatility are given in the concluding section.
The importance of factors such as ease of quality control, reliability and supply situation are emphasised in an attempt to show that laminated woods are materials competitive with steel in performance but which need further exploitation. The availability of shear and bonding properties of laminates is thought to be particularly advantageous for tailor making composites for particular stress conditions and the concluding paragraph is on applications, joining methods, surface treatments and the merits of conventional plywood containers. (70/4/14)
General
(70/5/11) Speeding up RP tank production Modern Plastics, Vol 47, No 2, p 55 ( l 970j
Liggers van polyester
met glasvezel versterkt
CHEN, P. E. and LEWIS, T. B.
119 (March
Polymer Engineering and Science, Vol 10, No 1, p 43 (January 1970)
Moveable floors constructed with glass fibre reinforced girders are being used in swimming baths. The material is
The results of both theoretical and experimental stress analysis of ribbon reinforced composites are presented, the theoretical work being based on
MARKUS, IR. TH. H. A description of the semi-automated production of chemical storage tanks of 20 to 20 000 gallon capacity in glass/polyester. The tanks are made by a combination of winding and sprayup techniques using an isophthalic
Stress analysis of ribbon reinforced composites
Plastica, Vol 23, pp 112 1970)
COMPOSITES June 1970
257
Now: Here are foam-glass composites Plastics Technology, Vol 16, No 2 (February 1970) A rigid type of composite formed of urethane foam and glass is described. It is produced by filling a filament wound glass cocoon with between 75 and 95% foam. No sizings or binders are required in the fabrication process. The material is reported as being useful for high-density moulded products. (70/4/75)
Pilkington puts £8 million into glass fibre growth The Engineer, p 7 (March 197@ The Pilkington company, Fibreglass expect the total UK market for glass reinforced plastics to increase from the present 47 000 tons/year to 150 000 tons by 1980 and the parent company is therefore investing £8 million in a factory for the production of glass fibre reinforcing material. Some of the expertise for such a venture will be provided via a tie up with OwensCorning Fibreglass who are the world's major manufacturer. (70/4/76)
polyester, and chopped glass fibre together with layers of glass mat and biaxially wound glass tape. The fabrication process is mechanized by means of rotating mould tables that are synchronized with a hydraulic work. platform that moves up and down. It is claimed that this system makes it possible to produce a 15 layer, 12 000 gallon tank in 3 sections in 8 working hours. (70/4/78)
Vosper Thorneycroft to build 153 ft mine hunter for the Royal Navy Reinforced Plastics, Vol 14, No 6, p 160 (February 1970) The article outlines the proposed manufacturing techniques which will be used to make what is thought to be the largest glass reinforced plastic vessel afloat anywhere in the world. The particular advantage of reinforced plastics for this application is their resistance to attack by sea water and marine organisms. The effort is aimed eventually at providing the basis of a hull for a new generation of mine counter measure ships. (70/4/79)
T.R.W. Systems of Redonds Beach California have developed a polyimide resin system which can be used to produce boron reinforced laminates with less than 2% voidage. The laminating varnish P 13N has 40% solids in dimethyl formamide solvent and can be partly cured on the reinforcement to produce a stable pre-preg. Heat and low pressure produce a reaction without the liberation of volatiles and the elimination of post curing is noteworthy. (70/4/77)
Exact solutions for rectangular bidirectional composites and sandwich plates PAGANO, N. J.
Journal of Composite Materials, Vol 4, pp 20 34 (January 1970) Three dimensional elasticity solutions are constructed for rectangular laminates with pinned edges. The lamination geometry treated consists of arbitrary numbers of layers which can be isotropic or orthotropic with material symmetry axes parallel to the plate axes. Several specific problems are solved, including a sandwich plate, and compared to the analogous results in classical laminated plate theory. (70/5/13)
Structures Honeycombs: ideal composites for a hive of industry
Wood laminates must not be ignored by engineering firms The Engineer, p 49 (March 1970)
HILL, P.
The Engineer, p 28 (February 1970) Polyimide resin system cuts voids in laminate The Engineer, p 11 (January 197@
particularly suitable owing to its resistance to swimming pool water. Laboratory tests, load standards and fabrication methods are described. Results of tests give the relation between load, length change and maximum deflection, from which the modulus of elasticity is calculated. About four floors have been constructed using such T-girders and some ten more are under construction at present. (70/5/12)
In a general review article the manufacture, properties and applications of honeycomb composites are described in an attempt to show how they can be tailor made to meet the requirements of industry. Their strength is attributed to their many I sections and their resistance to bending to the strongly bonded facings while graphically the shear strengths, strength retention at temperature and cost of G R P honeycombs are shown with the same properties for other honeycombs. The criteria for selection of core and facing materials are outlined and some examples of their w:rsatility are given in the concluding section.
The importance of factors such as ease of quality control, reliability and supply situation are emphasised in an attempt to show that laminated woods are materials competitive with steel in performance but which need further exploitation. The availability of shear and bonding properties of laminates is thought to be particularly advantageous for tailor making composites for particular stress conditions and the concluding paragraph is on applications, joining methods, surface treatments and the merits of conventional plywood containers. (70/4/14)
General
(70/5/11) Speeding up RP tank production Modern Plastics, Vol 47, No 2, p 55 ( l 970j
Liggers van polyester
met glasvezel versterkt
CHEN, P. E. and LEWIS, T. B.
119 (March
Polymer Engineering and Science, Vol 10, No 1, p 43 (January 1970)
Moveable floors constructed with glass fibre reinforced girders are being used in swimming baths. The material is
The results of both theoretical and experimental stress analysis of ribbon reinforced composites are presented, the theoretical work being based on
MARKUS, IR. TH. H. A description of the semi-automated production of chemical storage tanks of 20 to 20 000 gallon capacity in glass/polyester. The tanks are made by a combination of winding and sprayup techniques using an isophthalic
Stress analysis of ribbon reinforced composites
Plastica, Vol 23, pp 112 1970)
COMPOSITES June 1970
257