Composites and Material Properties

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raffay13
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#1
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#1
Composites are often made of layers. The pictures below represents three different laminates made of two plies of uni-directional fibres (all of equal ply thickness and area) being pulled apart in the loading direction shown.
(i) Rank these in order of strength, giving your reasons why you think this?
(ii) State which laminate will not turn out flat and explain why.
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raffay13
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#2
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#2
this is part of the question. please help.
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Joinedup
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#3
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#3
Do you understand which way the fibres are aligned in those diagrams?
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raffay13
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#4
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kind of yeah. please help
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Joinedup
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#5
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#5
The fibres used in composite material have high tensile strength so it requires a high force parallel to the fibres to stretch or break the material... but the fibres are stuck to each other fairly weakly so it requires less force at 90 degrees to the direction of the fibres to stretch or break the composite material.

hope that helps
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