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Outline

Basic concept

composite

Composite

Matrix
Material

Reinforcement

Composites are comprised of two or more materials working together, where each constituent material retains its unique identity within the composite and contributes its own structural properties, yet upon combination the resulting material has properties superior to those of its constituents. It consists of Reinforcement and Matrix.

History

Origin	It was originated from a dense brick reinforced in order to increase the strength of bricks in ancient Egypt.
1940s	Development of glass fiber composite material. Beginning of Fiber Reinforcement Plastic(FRP) industry.
1960s	Development of Kevlar fiber that is rigid and light by Dupont. Development of a variety of high-performance fibers. (Boron, SiC, Carbon, Alumina)
1980s	Korean domestic production of carbon fiber. Establishment of Korean Society for Composite Materials.
2000s	Application in various fields such as aircraft, boats, bridges etc.

Advantages and Disadvantages of composites.

Advantages	Disadvantages
Multifunctional materials → various design Corrosion resistant Resistance to metal fatigue, crack, breakdown Easily molded to shape Low coefficient of expansion Simple manufacturing and assembly process → purchasing and other cost saving Assemble by parts → Lower tooling costs Possibility of automation Anisotropic High strength and stiffness-to-weight ratio → fuel saving and long cruising range	Expensive materials Low modulus of elasticity Low fire retardant or low resistance to flame Slow forming speed Easily damaged Complexity of design and analysis Low strength on high temperature Complex and expensive inspection

Advantages

Disadvantages

Multifunctional materials → various design
Corrosion resistant
Resistance to metal fatigue, crack, breakdown
Easily molded to shape
Low coefficient of expansion
Simple manufacturing and assembly process → purchasing and other cost saving
Assemble by parts → Lower tooling costs
Possibility of automation
Anisotropic
High strength and stiffness-to-weight ratio → fuel saving and long cruising range

Expensive materials
Low modulus of elasticity
Low fire retardant or low resistance to flame
Slow forming speed
Easily damaged
Complexity of design and analysis
Low strength on high temperature
Complex and expensive inspection

Application of composite

Light weight | Low coefficient of expansion | High elasticity

Aerospace	Fuselage, Wing, Cab, Cabin, Interior panel, Space craft etc.
Automobile	Car body, Tire Cord, Airbag, Seatbelt, Head Liner, Door trim, etc.
Train	Front region, Cab, Cabin, Interior panel, Hood, Roof etc.
Ship or Vessel	Body, Cab, Cabin, Interior panel, Anchor, Rubber boat etc.