If not, the strength of the material is reduced. The composite’s micro-mechanical properties at the interface between resin and fiber are also not well understood. Cost. The cost of polymer composites can outweigh many of their advantages. Advanced materials require expensive design and processing procedures.
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Composite designs also last longer than aluminum, which means fewer maintenance and repair costs. Disadvantages. Because composite materials don’t break easily, that makes it hard to tell if the interior structure has been damaged at all and this, of course, is the single most concerning disadvantage for using the composite material.
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The base material is modified to meet your requirements and then combined with other materials. In essence, a composite material should add to the advantages of the structure as a whole. Composite materials are combinations of two or more material components.
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Composite materials allow us to obtain materials which combine the best characteristics of two different materials or maximize the performance of a single material. For example: Plywood. Wood is strong against the grain but weak with the grain so by alternating layers with the grains oriented at 90 degrees to each other the resultant sheet is very strong in both directions.
However, these materials have a low compressive strength, meaning they can break easily under sudden, sharp forces. A finished polymer composite will have a smooth surface, making it useful to reduce aerodynamic drag in aircraft. Resilience. Polymer composites have excellent resistance to chemical corrosion, scratching, rust and seawater.
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