An assembly of dissimilar materials used together to perform
in ways the individual materials could not.
old
composites
wood
reinforced concrete
plywood
advanced
composites
resin/fiber
resin matrix
epoxy [high
strength]
polyester [low
strength])
fiber
glass fiber
(limestone or sand)
carbon fiber
(graphite, newer, factor of 5 difference in how you “lay it up”)
Kevlar fiber (high strength, toughness)
˝ weight of aluminum
core Laminates
foam
ply
balsa
honeycomb
Polymers, Elastomers, Epoxies
Monomers, polymers
Urethanes, polyurethanes
A
family of resins produced by reacting a diisocyanate
with an organic compound containing two or more active hydrogen atoms to form
polymers having free isocyanate groups. These groups,
under the influence of heat or certain catalysts, will in turn react with each
other, or with a compound containing an active
hydrogen, such as water or a glycol, to form a thermosetting material.
Thermoplastic polyurethanes are also available as elastomeric
or rigid materials readily accepting a variety of reinforcements such as glass
or carbon fiber. A 40% glass fiber loading of the rigid material will yield a
product with a flexural modulus of 1 million psi.
With 30% carbon fiber a modulus of over 2 million psi
is available. The terms urethane and polyurethane are used interchangeably.
Epoxies (system 2000).
Forming
Laminate
casting
mold making
plaster
polymer
silicon
vacuum
former
injection molder
Joining
ultrasonic
welder demo
Fasteners
Screws
Met
Eng
sae fine
washers, loctite
Rivets
Welding