From this isostrain equation you can see that the matrix, which has a low modulus, acts to decrease the composite modulus. What then is the principal role of the matrix in fibre-reinforced composites?

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To increase the ductility of the fibres

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To provide a ductile matrix for high stiffness fibres to generate unique sets of mechanical properties

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To decrease the density of the composite

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To decrease the cost of the composite

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To allow different colours and finishes to be generated

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From this isostrain equation you can see that the matrix, which has a low modu...

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