Guide To Composites

Guide To Composites
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غير معروف
15 فبراير 2021
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Guide To Composites
To fully appreciate the role and application of composite materials to a structure, an understanding is required
of the component materials themselves and of the ways in which they can be processed. This guide looks at
basic composite theory, properties of materials used, various processing techniques commonly found and
applications of composite products.
In its most basic form a composite material is one which is composed of at least two elements working
together to produce material properties that are different to the properties of those elements on their own. In
practice, most composites consist of a bulk material (the ‘matrix’), and a reinforcement of some kind, added
primarily to increase the strength and stiffness of the matrix. This reinforcement is usually in fibre form. Today,
the most common man-made composites can be divided into three main groups:
Polymer Matrix Composites (PMC’s) These are the most common and will the main area of discussion in this
guide. Also known as FRP – Fibre Reinforced Polymers (or Plastics) – these materials use a polymer-based
resin as the matrix, and a variety of fibres such as glass, carbon and aramid as the reinforcement.
Metal Matrix Composites (MMC’s) – Increasingly found in the automotive industry, these materials use a metal
such as aluminium as the matrix, and reinforce it with fibres such as silicon carbide.
Ceramic Matrix Composites (CMC’s) – Used in very high temperature environments, these materials use a
ceramic as the matrix and reinforce it with short fibres, or whiskers such as those made from silicon carbide
and boron nitride.
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