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2016.01.282016.01.28Hüseyin KÜÇÜKHüseyin KÜÇÜK

ADVANCED COMPOSITESADVANCED COMPOSITES

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AGENDA

Early Forms of Composites Definition of Advanced Composites Advantages / Disadvantages Types of Advanced Composites Storage, Handling, and Safety Review

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EARLY FORMS OF COMPOSITES

Mud-brick(Straw mixed with mud)

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Plywood(Glued plies of wood)

EARLY FORMS OF COMPOSITES

The First Composite Aircraft Structure, in 1940

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DEFINITION OF ADVANCED COMPOSITES

Fiber cloth and Resin

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ADVANTAGES Low weight – high strength Stiffness-to-weight ratio Increase design flexibility More resistant to fatigue than metals Composites do not corrode Aerodynamically smooth surfaces "Low Observable" characteristics

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DISADVANTAGES Expensive raw material cost Labor intensive Hidden damage can be hard to detect Special training and skills are required Some composites can cause corrosion Short shelf life Moisture absorption (aramid)

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TYPES of COMPOSITES Carbon/Graphite (Carbon Fiber)

– Design Flexibility– Stiff and strong– Structural aircraft applications

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TYPES of COMPOSITES Aramids (Kevlar)

– Applications both in aviation and civilian sectors.– Kevlar 29 and Kevlar 49

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TYPES of COMPOSITES Boron

– The hardest and strongest– Only flat structures– Very expensive and hazardous

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STORAGE, HANDLING, SAFETY

Storage– Non-Frost-Free Freezer– Constant 0 °F or lower– Moisture proof bags

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Handling– Non-powdered latex or nitrile gloves

Safety– Wear safety goggles– Protect your skin– Wear air supplied respirator or mask

Definition of composites

Advantages / Disadvantages

Types of Composites

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REVIEW