10. Composites Flashcards
1
Q
What is a composite material?
A
- a material comprised of two or more different materials
- results in a material with enhanced properties
2
Q
What are the two more commonly used composites?
A
- carbon fibre reinforced polymer (CFRP)
- glass fibre reinforced polymer (GRP)
3
Q
What are composites?
(examples)
A
- CFRP
- GRP
- tungsten carbide
- aluminium composite board
- concrete
- reinforced concrete
- fibre cement
- engineered wood
4
Q
What are the properties of CFRP?
A
- carbon fibres mixed with polyester resin
- lightweight
- corrosion resistant
- tough
- hard
- good compressive strength
- low thermal expansion
5
Q
What are the uses of CFRP?
A
- sports equipment such as bicycle frames and tennis racquets
- fishing rods
- racing car bodies and parts
- helmets
- prosthetics
6
Q
What are the properties of GRP?
A
- glass fibres mixed with polyester resin
- lightweight
- corrosion resistant
- tough
- hard
- low thermal expansion
- good compressive strength
7
Q
What are the uses of GRP?
A
- boat hulls
- pond liners
- kayak shells
- sports car bodies and parts
- locomotive train cabs
8
Q
What are the properties of tungsten carbide?
A
- a cermet (mix of ceramic and metal particles)
- ceramic tungsten and cobalt metal
- hard
- tough
- resistant to high temperatures
- corrosion resistant
9
Q
What are the uses of tungsten carbide?
A
- cutting tools such as drill bits, lathe tool tips, router bits, kitchen knives
10
Q
What are the properties of aluminium composite board?
A
- aluminium sheets with a polyethylene core
- lightweight
- rigid
- tough
- malleable
- good thermal and sound insulation
- good vibration damping
11
Q
What are the uses of aluminium composite board?
A
- soundproofing panels in cars, buildings and boats
- signage
12
Q
What are the properties of concrete?
A
- cement powder, sand, aggregate particles mixed with water
- high compression strength
- low tensile strength
- few surface defects
- easy to mould
13
Q
What are the uses of concrete?
A
- pathways
- beams
- blocks
- driveways
- house foundation
14
Q
What are the properties of reinforced concrete?
A
- cement powder, sand, aggregate particles and polymer or steel rods (rebar) mixed with water
- high compression and tensile strength
- consistency across the structure
- few surface defects
- fire resistant
15
Q
What are the uses of reinforced concrete?
A
- buildings
- bridge piles and bridge spans
- retaining walls
- grid floors
16
Q
What are the properties of fibre cement?
A
- cement powder, sand, aggregate particles and polymer or steel fibres mixed with water
- lighter in weight than reinforced concrete
- hard
- tough
- good at low temperatures and in freeze/thaw situations
17
Q
What are the uses of fibre cement?
A
- suspended floors
- complex geometric shapes
- pathways
18
Q
What are the properties of engineered wood?
(plus example)
A
- e.g. glulam (glued laminated timber)
- timber laminates and MF adhesive
- good aesthetics
- natural alternative to reinforced concrete
- more lightweight than concrete alternatives
- fire resistant
- good structural stability
- corrosion proof
19
Q
What are the uses of engineered wood?
A
- beams
- bridges
- domes
- arches
- decking
- roof beams
- rafters
