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Outline! Concept of composite and laminate

! Mechnical properties

! Conclusion: Benefits of it use

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What is a composite?A composite material is a material made from two or moreconstituent materials that remain separated in the final structure.

The new material may be preferred for many reasons: materials

which are stronger, lighter, or less expensive when compared totraditional materials .

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LaminatesA laminate is a assembly of pliesof reinforced polymer. Each ply isformed by a polymer acting asmatrix and a fiber acting asreinforcement. The polymer in thematrix can be termoplastic ortermoset, and there are a lot ofdifferent type of fiber, depending

of the material on which aremade.

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Mechanical Properties

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! Elastic ModulusExpoxy and carbon fiber laminate: 200 – 650 GpaAluminium: 70 Gpa

! Tensile StrengthExpoxy and carbon fiber laminate: 2 – 7 GpaAluminium: 200 Mpa

Laminate VS Aluminium

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! Bad impact strength

! Interlaminar crack

! With a small impact, the tensile strength decreases around afifty percent

Impact Strength

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! Aluminium:2,7 Kg.m -3

! Titanium: * Laminate:4,5 kg.m -3 1,5 – 2 Kg.m -3

! Steel:7,8 kg.m -3

Density

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! Mechanical properties far superior that Aluminium

! Bad impact strength

! Low density ! High mechanical properties per weight

Conclusion