Composite Materials

Polymeric matrices
1. Thermostable
  1. Fragile
    1. Polyester
    2. Epoxy resin
  2. Easy processing
  3. Tenaciousness
2. Thermoplastic
  1. Difficult processing
  2. Reusable
    1. Polypropylene (PP)
Reinforcement
1. Fiber
  1. Fiberglass
    1. Mechanical properties
      1. Good relation resistance/weight
      2. Good dimensional stability
    2. Economy
      1. Easy fabricacion
      2. Low cost
    3. Physical properties
      1. Thermal Resistence
      2. Corrosion Resistance
      3. Electrical Insulator
    5. Uses
      1. Storage tanks
      2. construction of the Boeing 707
  2. Carbon Fiber
    1. Mechanical propertie
      1. Low densuty
      2. High tenacity
    2. Economy
      1. High cost
    3. Physical properties
      1. Chemistry resistanc
      2. Low expansion thermal
  3. Kevlar
    1. Mechanical propertie
      1. Low density
      2. high strength
      3. high modulus of elasticity
      4. Subjected to hydrostatic pressure, Kevlar is 20 times stronger than steel
    2. Economy
      1. High cost
    3. Physical properties
      1. High temperature resistance
      2. Impact resistence
    4. Uses
      1. Bulletproof vest
Particle Reinforced
1. Uses in Industry
  1. Automotive Glass reinforced plastics are used in many automotive applications including body panels, bumpers, dashboards, and intake manifolds. Brakes are made of particulate composite composed of carbon or ceramics particulates.
2. Benefits
  1. Improved material properties
  2. Tailored material properties
  3. Manufacturing flexibility
Fiber Reinforced
1. Automotive
  1. Particulate reinforced plastics have been used for some time but fiber reinforced composites have only really been used in high end sports cars but are starting to make their way into traditional vehicles.
2. Aerospace
  1. Carbon fiber composites are now quite common in commercial and military aviation. The Boeing 787 and Airbus A350 XWB have roughly 50% of their structure from composite materials.
3. Benefits
  1. High stiffness to weight ratio
  2. High strength
  3. Corrosion resistant
  4. Fatigue resistant
  5. Energy Absorption on Impact
  6. Tailored material properties
4. Marine
  1. These are not traditional laminated composites, rather the glass fibers are oriented randomly giving the structure more uniform material properties. Being fairly cheap, glass fiber can be used in large structures.

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Composite Materials

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