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an advanced society, binding power, a tension force, compressive strength, is boundtogether by cement, reinforced concrete, by sharing any stress among smth., is shaped with tools, resist wear and attack by chemicals, fine threads, fracture toughness, is exposed to high temperatures, are exposed to frictionand wear, to be exposed to extreme environments, long shelf life, are to meet specific requirements, resists both squeezing and tearing, immensely strong,add toughness to the material, exactly fit the requirements for, sandwich composites, sandwiched between, can be moulded into complex shapes, totally replace, to share the stress around.

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Putting it Together – the Science and Technology of

Composite Materials

Part I

In an advanced society like ours we all depend on composite materials in some aspects of our lives. Fiberglass developed in the late 1940s was the first modern composite and is still the most common. It makes up about 65 per cent of all the composites produced today and is used for boat hulls, surfboards, sporting goods, swimming pool linings, building panels and car bodies. You may well be using something made of fiberglass without knowing it.

What makes a material a composite?

Composite materials are formed by combining two or more materials that have quite different properties. The different materials work together to give the composite unique properties but within the composite you can easily tell the different materials apart – they do not dissolve or blend into each other.

Composites exist in nature. A piece of wood is a composite with long fibres of cellulose (a very complex form of starch) held together by a much weaker substance called lignin. Cellulose is also found in cotton and linen (холст), but it is the binding power of the lignin that makes a piece of timber (лесоматериал) much stronger than a bundle(связка) of cotton fibres.





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