Composite materials use in engineering applications

Composite materials are particularly attractive to aviation and aerospace applications because of their exceptional strength and stiffness-to-density ratios and superior physical properties.

1. Contents Introduction. Definition of Composite Materials. Overview of Composite Materials. Composite Materials. Classification of Composite Materials. Fabrication. Composite Materials for Aerospace. Use of composites in aerospace structure. Materials for aerospace composites. Manufacturing /Construction Process. Advantages and disadvantages of Composite Materials. Applications. Conclusion.

2. Introduction Composite materials are particularly attractive to aviation and aerospace applications because of their exceptional strength and stiffness-to-density ratios and superior physical properties. As the technology matured, the use of composite materials for primary structures such as wings and fuselages has increased. Initial applications of composite materials to aircraft structures were in secondary structures such as fairings, small doors and control surfaces. 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.

3. Overview of Composite Materials • Composites are essentially plastics reinforced with carbon fibres. • Emergence of strong and stiff reinforcements like carbon fibre along with advances in polymer research to produce high performance resins as matrix materials have helped meet the challenges posed by the complex designs of modern aircraft.

4. Definition of Composite Materials Two or more inherently different materials that when combined together produce a material with properties that exceed the constituent materials. A composite material typically consists of relatively strong, stiff fibres in a tough resin matrix. The properties of the composite are superior and possibly unique in some specific respects to the properties of individual components

5. Composite Structural Organization Fibre/Filament Matrix Composite Reinforcement

6. Composite Materials 1 . Composite materials can provide a much better strength-to-weight ratio than any metals. 2. Carbon fibres, each no larger than a human hair, are set into resin to form sheets. Fibre’s layer Covering with Resin matrix to form sheets

7. Reinforcements The role of reinforcement in composite materials is primarily to add mechanical properties to the material such as strength and stiffness Reinforcements basically come in three forms: particulate discontinuous fiber continuous fiber

8. Fiber Orientations

9. MATRİX The role of the matrix is to bind the reinforcement together so that the applied stress is distributed among the reinforcement and to protect the surface of the reinforcement from being damaged. Composites are classified according to their matrix phase : P olymer matrix composites (PMC's) C eramic matrix composites (CMC's) M etal matrix composites (MMC's)

10. COMPOSITE SURVEY