Today's KNOWLEDGE Share: The main properties of composite materials!

Today's KNOWLEDGE Share:

The main properties of composite materials! 

As you may know, the characteristics/properties of composite materials resulting from the combination of reinforcement and matrix depend on: the proportions of reinforcements and matrix, the form of the reinforcement, and the fabrication process. 

But what are the most remarkable properties of these materials? 

- Composite materials generally possess very high specific mechanical properties.

- Composite materials do not yield: their elastic limits correspond to the rupture limit.

- Composite materials have high strength under fatigue loads.

- Composite materials age under the action of moisture and heat.

- Composite materials do not corrode, except in the case of contact aluminum with carbon fibers in which galvanic phenomenon creates rapid corrosion.

- Composite materials are not sensitive to the common chemicals used in engines: grease, oils, hydraulic liquids, paints and solvents, petroleum. However, cleaners for paint attack the epoxy resins.

- Composite materials have medium- to low-level impact resistance (inferior to that of metallic materials).

- Composite materials have excellent fire resistance as compared with the light alloys with identical thicknesses. However, the smoke emitted from the combustion of certain matrices can be toxic.

But how do they fair against each other when it comes to specific strength in different temperatures? Which composites can be used in high temperature applications? 

Source:managing composites

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Bibliographical Reference:

Composite Materials Design and Applications - Page 16

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