Introduction to Composites
An Aerospace
Manufacturing
Perspective
Course Overview
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Composite Material Structure
Composite Material Components
Aluminum versus Composites
Advantages and Disadvantages in Aerospace
Composite Applications
Composite Manufacturing Techniques
Subsequent Composite Modules
copyright J. Anderson, 2008
Composites in Aviation
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What are composites?
 Combinations of different materials which yield
a product with superior properties
 Composite armor used by the Greeks in
antiquitiy
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(http://www.youtube.com/watch?v=Aznz9mj5grA)
 Modern
composites, or advanced composites
are typically fiber reinforced plastics.
copyright J. Anderson, 2008
Fiber Reinforced Plastic (FRP)
Composites
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Consists of at least two materials
– Plastic which binds the fibers together, also called
the matrix
– Fibers, typically small in diameter and long in
length
 Fibers may also be short in length to facilitate
processing – e.g., injection molded nylon with
glass fibers
– In general the matrix imparts toughness, or crack
resistance, and the fiber imparts ultimate strength
copyright J. Anderson, 2008
Fiber Reinforced Plastic Composites,
contd.
Fibers
Plastic Matrix
copyright J. Anderson, 2008
Function of the Fiber
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Carry the load
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Provide structural properties to the
composite
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70 to 90% of load carried by fibers
Stiffness
Strength
Thermal stability
Provide electrical conductivity or insulation
copyright J. Anderson, 2008
Function of the Matrix
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Binds the fibers together
Provides rigidity and shape to the structure
Isolates fibers to slow crack propagation
Surface quality
Corrosion and wear protection for fibers
copyright J. Anderson, 2008