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DT > 10 - Composites > Flashcards

10 - Composites Flashcards

1
Q

Suitability of composite materials (4)

A
  • They have the ability to be moulded into a variety of 3D forms
  • Enhancement of physical and/or mechanical properties
  • Ease of manufacture for some uses against traditional materials
  • Improved product performance
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2
Q

Examples of composite materials (7)

A
  • Carbon fibre reinforced plastic (CFRP)
  • Glass reinforced plastic (GRP)
  • Tungsten carbide
  • Aluminium composite board
  • Concrete, including reinforced concrete
  • Fibre cement
  • Engineered wood e.g glulam (glued laminated timber)
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3
Q

What is glass reinforced plastic (GRP)?

A
  • Is a composite material made of glass fibres mixed with polyester resin
  • Commonly referred to as fibreglass
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4
Q

Properties of Glass reinforced plastic (GRP) (6)

A
  • Lightweight
  • Corrosion resistant
  • Tough
  • Hard
  • Low thermal expansion
  • Good compressive strength
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5
Q

Uses of Glass reinforced plastic (GRP) (5)

A
  • Boat hulls
  • Pond liners
  • Kayak shells
  • sports car bodies and parts
  • Locomotive train cabs
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6
Q

What is Tungsten carbide? (3)

A
  • Is an alloy of Tungsten and carbon usually mixed with a binder, commonly cobalt
  • Grey in colour
  • Some hardness as corrindum or sapphire so to sharpen or cut it you would need to use diamond tools
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7
Q

Properties of Tungsten carbide (4)

A
  • Hard
  • Tough
  • Resistant to high temperatures
  • Corrosion resistant
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8
Q

Uses of Tungsten carbide (4)

A
  • Cutting tools such as drill bits
  • Lathe tool tips
  • Router bits
  • Kitchen knives
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9
Q

What is alminium composite board? (3)

A
  • Feature two thin sheets of aluminium enclosing polyethylene
  • Can be used in a huge range of applications
  • Lightweight, strong, extremely flat surface that makes it suitable for printing high quality graphics or text
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10
Q

Properties of Aluminium composite board (6)

A
  • Lightweight
  • Rigid
  • Tough
  • Malleable
  • Good thermal and sound insulation
  • Good vibration damping
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11
Q

Uses of aluminium composite board (3)

A
  • Sound-proofing panels in cars
  • Buildings and boats
  • Signage
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12
Q

What is concrete (including reinforced concrete)?

A

Is a composite material in which concrete’s relatively low tensile strength and ductility are concentrated by the inclusion of reinforcement having higher tensile strength or ductility

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13
Q

Properties of reinforced concrete (4)

A
  • High compression and tensile strength
  • Consistency across the structure
  • Few surface defects
  • Fire Resistant
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14
Q

Uses of reinforced concrete (4)

A
  • Buildings
  • Bridge piles and and bridge spans
  • Retaining walls
  • Grid floors
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15
Q

What is fibre cement? (3)

A
  • Is a composite building and construction material
  • Used mainly in roofing and facade products due to its strength and durability
  • Commonly used on the side of buildings
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16
Q

Properties of fibre cement (4)

A
  • Lighter in weight than reinforced concrete
  • Hard
  • Tough
  • Good at low temperatures and freeze/thaw situations
17
Q

Uses of Fibre cement (3)

A
  • Suspended floors
  • Complex geometric shapes
  • Pathways
18
Q

Composition of fibre cement

A

Cement powder, sand, aggregate particles and polymer or steel mixed with water

19
Q

What is Engineered wood?

A

Includes a range of derivative wood products which are manufactured by binding or fixing the strands particles fibres or Veneers or boards of wood together with Adhesives or other methods of fixation to form composite materials

20
Q

Properties of engineered wood (6)

A
  • Good aesthetics
  • Natural alternative to reinforced concretes
  • More Lightweight than concrete alternatives
  • Fire Resistant
  • Good structural stability
  • Corrosion proof
21
Q

Uses of engineered wood (7)

A
  • Beams
  • Bridges
  • Domes
  • Arches
  • Decking
  • Roof beams
  • Rafters
22
Q

Composition of engineered wood

A

Timber limited and MF adhesives

23
Q

Composition of reinforced concrete

A

cement powder, sand, aggregate particles and low carbon steel rods (rebar) mixed with water

24
Q

Composition of concrete

A

Cement powder, sand, aggregate particles mixed with water

25
Q

Composition of Tungsten carbide

A

A cermet (mixture of ceramic and metal particles) ceramic Tungsten and cobalt metal

26
Q

Composition of GRP

A

Glass diners mixed with polyester resin

27
Q

composition of CFRP

A

carbon fibres mixed with polyester resin or epoxy resin

28
Q

Properties of CFRP (6)

A
  • Lightweight
  • Corrosion Resistant
  • Tough
  • Hard
  • Good compressive strength
  • Low thermal expansion
29
Q

Uses of CFRP (5)

A
  • Sports equipment such as bicycle frames and tennis racquets
  • Fishing rods
  • Racing Car bodies and parts
  • Helmets
  • Prosthetics
30
Q

Properties of concrete (4)

A
  • High compression strength
  • Low tensile strength
  • Few surface defects
  • Easy to mould
  • Can be situ or pre fabricated
  • Very stable material
31
Q

Uses of concrete (5)

A
  • Pathways
  • Beams
  • Blocks
  • Driveways
  • House foundations
32
Q

What is a composite material?

A

a material composed of two or more different materials, resulting in a material with enhanced materials

33
Q

Ingredients of concrete (5)

A
  • Course aggregate
  • Water
  • Admixture - makes concrete more fluid
  • Cement
  • Sand

DT (25 decks)

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