SEMINAR ONCOMPOSITE

MATERIALS IN AEROSPACE APPLICATIONS

Introduction to Composite Materials Classification of composite Application of composites in aerospace Advantages & Disadvantages of

composites Conclusions References

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Composite material is a material composed of two or more distinct phases(matrix phase and dispersed phase) which are chemically & physically different

Composites are used because overall properties of the composites are superior to those of the individual components

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The primary phase, having a continuous character , is called matrix. Matrix is usually more ductile and less hard phase. It holds the dispersed phase and shares a load with it.The second phase (or phases) which is embedded in the matrix is called dispersed phase. Dispersed phaseis usually stronger than the matrix, therefore it is called reinforcing phase

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Composites

Particulate reinforced Fiber reinforced

Structural

Continuous Discontinuous

Laminates SandwichPanels

LargeParticle

DispersionStrengthened

Aligned Random

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Particulate reinforced

LargeParticle

Dispersionstrengthened

Fiber reinforced

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Structural

Laminates

Sandwich

Panels

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• High strength to weight ratio (low density high tensile strength)

•  High creep resistance

•  High tensile strength at elevated temperatures

• High toughness

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Thermoset resins polyester , Epoxy,Phenol,Polyimide

Thermoplastics PolyPhenyleneSulifide(PPS), PolyEtherEtherKetone(PEEK), PolyEtherimide (PEI)

Polymeric matrices in aerospace:

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Metals (aluminium, titanium etc.) Glass Ceramics

Hybrid(composites)Carbon aramid reinforced epoxyGlass Carbon reinforced epoxy

Following are the some composites in aerospace :

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The Boeing 777 is a long-range wide- body twin-engine jet airliner manufactured by Boeing commercial airplanes. It is the world's largest twinjet and has a capacity of over 300 passengers, with a range of 5,235 to 9,380 nautical miles (9,695 to 17,370 km) .12% composites are used

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composite materials will play an increasingly significant role in aerospace application

B787,A350-XWB used more than 50% composite materials

With their unique combination of properties such as low weight, high strength, low flammability, smoke density and heat release, non-toxicity and durability, composites are ideal for many aerospace applications, both for interior and exterior components.

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Mainly from Reference 1: “Low-cost composite materials and structures for aircraft applications”, Doe R.B., Starnes, J.H., Holzwarth, R.C.,May 2001.

Callister’s Materials science andengineering,wiley india publication

Composite materials for aerospace applications.P D MANGALGIRI Aeronautical Development Agency, Vimanapura PO, Bangalore 560017, India

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