composites Flashcards
1
Q
what are the two types of composites
A
- particulate - PC concrete, asphalt concrete)
- fiber reinforced - wood, FRC, FRP
2
Q
what are some examples of matrix materials
A
- polymers
- hydrated cement paste
- metals
- ceramics
3
Q
what are some examples of fiber materials
A
- glass
- carbon
- polypropylene
- aramid
- boron
- steel
– nylon - polyethylene
4
Q
what are the different fibre configurations
A
- 1D: unidirectional
- 2D: random
- 2D: oriented
- 3D: random
5
Q
what are stiff and elastic reinforcing fibres used for
A
help reduce creep in polymeric materials
6
Q
advantages of FRPs
A
- low density
- low cost
- low heat conductance
- corrosion resistance
- high specific stength
7
Q
disadvantages FRPs
A
- brittle at low temp
- properties degrade at high temp
- moisture sensitive
- poor impact resistance
8
Q
A
