Manufacturing

Download Composite Manufacturing Technology by A. G. Bratukhin, V. S. Bogolyubov, G. M. Gunyaev (auth.), A. PDF

By A. G. Bratukhin, V. S. Bogolyubov, G. M. Gunyaev (auth.), A. G. Bratukhin, V. S. Bogolyubov (eds.)

Some years in the past in Paisley (Scotland) the overseas convention on Composite fabrics, headed by way of Professor I. Marshall, happened. throughout the convention, I offered a paper at the production and homes of the Soviet Union's composite fabrics. Soviet had made nice achievements within the production of composite fabrics for aerospace and rocket purposes. for instance, the fraction of composites (predominantly carbon fibre bolstered plastics) within the huge passenger aircrafts Tu-204 and 11-86 is 12-15% of the constitution weight. the share through weight percentage of composites in army airplane is larger and the fraction of composites (organic fibre strengthened plastics) utilized in army helicopters exceeds a half the complete constitution weight. The nostril components of so much rockets are produced in carbon-carbon fabrics. within the Soviet spacecraft 'Buran' many fuselage tubes are made from boron-aluminium composites. Carbon-aluminium is used for house mirrors and gasoline turbine blades. those are only a couple of examples of purposes. Many members on the Paisley convention steered that the tremendous Soviet adventure within the box of composite fabrics may be distilled and awarded within the type of a complete reference ebook. So the belief of the training and ebook of a six quantity paintings Soviet complex Composites know-how, edited via Professor I. Marshall and me, was once born.

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5. A roll of cloth filler (5) is placed into a chamber (1), closed tightly with a cover (2). A vacuum chamber meter (3) is mounted inside the latter. A pipeline (4) connects the internal cavity of chamber with a vacuum system. The free end of the cloth is drawn through a spinneret (6), the front part of which is dipped into a bath containing the binder (8), a transfer roller (9) and pressing rollers (7). 5 Plant for vacuum impregnation of fibrous filler. spinneret is larger than for capillary impregnation, because of the action of the additional pressure pA, which is equal to the difference between the atmospheric pressure and the residual air pressure in the vacuum chamber.

In liquid-phase combination the binder, having the consistency of a viscous liquid, moistens the surface of a fibrous filler and penetrates the interfibrous space. The solid-phase combination provides for a uniform distribution (by blank volume) of the fibrous filler of solid binder particles. The liquid-phase method for obtaining prep regs (impregnation) is subdivided into impregnation without pressure and impregnation under pressure. During the process of impregnation without pressure, the binder penetrates the interfibrous space under the action of surface-tension and gravitational forces, while forces of viscous friction resist binder movement.

3). A particular feature of the application of composites in the Il-96-300 airframe is the manufacturing of nearly all structural components from hybrid materials. The main load-bearing layers of hybrid material are made of carbon-tape LU-P. 3). 3 Areas and volume of application of various composite types in the 11-96-300 airframe No. Item Airframe 1 High-lift devices (aelerons, interceptors, brake flaps, nose and tail flap components, flap rails, fairing) 2 Pylon (external, inboard fairings) 3 Engine nacelle (nose component, door) 4 Air-intake cone 5 Service hatches 6 Landing-gear door 7 Wing fairing and flap Composite type Composite surface (m 2 ) Carbon- and organic-fibrereinforced composites Carbon-fibrereinforced composites 100 690 48 230 82 355 28 85 15 23 3 120 68 364 165 1650 Organic- and glass-fibrereinforced composites 450 1145 Organic-fibrereinforced composites 280 440 710 1585 70 150 } } Glass-fibrereinforced composites Carbonfibrereinforced composite Airframe total Composite structural component weight (kg) Cabin 8 Honeycomb panels and organic-monolayer lining Floor 9 Honeycomb panels Cabin total Perspective 10 Wing trailing-edge panels Carbonbundle-filler composites 28 Main technological aspects of manufacture In thin-skin production the surface of impregnated carbon tapes is coated in one cycle with a layer of organic fabric, giving erosion resistance and in-service damage resistance to the fragile carbonepoxy composite layers.

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