composites

Question 1

what are the two types of composites

Answer 1

• particulate - PC concrete, asphalt concrete)
• fiber reinforced - wood, FRC, FRP

Question 2

what are some examples of matrix materials

Answer 2

• polymers
• hydrated cement paste
• metals
• ceramics

Question 3

what are some examples of fiber materials

Answer 3

• glass
• carbon
• polypropylene
• aramid
• boron
• steel
  – nylon
• polyethylene

Question 4

what are the different fibre configurations

Answer 4

• 1D: unidirectional
• 2D: random
• 2D: oriented
• 3D: random

Question 5

what are stiff and elastic reinforcing fibres used for

Answer 5

help reduce creep in polymeric materials

Question 6

advantages of FRPs

Answer 6

• low density
• low cost
• low heat conductance
• corrosion resistance
• high specific stength

Question 7

disadvantages FRPs

Answer 7

• brittle at low temp
• properties degrade at high temp
• moisture sensitive
• poor impact resistance