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Engineering Applications 3004 > Materials - Week 2 > Flashcards

Materials - Week 2 Flashcards

1
Q

Attributes of metals?

A

Ductile, heat-conducting, strong

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2
Q

Attributes of polymers?

A

Lightweight, cheap to form, corrosion resistant

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3
Q

Attributes of elastomers?

A

Very flexible

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4
Q

Attributes of ceramics?

A

Hard, brittle, corrosion and abrasion resistant

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5
Q

Attributes of glasses?

A

Hard, brittle, transparent

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6
Q

Attributes of composites?

A

tough, high strength/weight ratio

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7
Q

Attributes of wood?

A

lightweight, cheap to form

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8
Q

Attributes of foams?

A

lightweight

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9
Q

What is strain?

A

deformation of a solid due to stress
ε= d /L
d = change of length (mm)
L = original(initial) length (mm) ε = strain (No units or %)

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10
Q

What is tensile stress?

A

The external force per unit area of the material resulting in the stretch of the material

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11
Q

What is the young modulus formula?

A

Young’s Modulus (E) = stress / strain E = σ /ε
E = (F / A) / (d / L)

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12
Q

What are Ferrous metals?

A

Consists of iron and steel, so can rust and is magnetic

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13
Q

What are Non-ferrous metals?

A

Metals and alloys without iron e.g aluminium

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14
Q

Thermoset polymers

A

Contains irreversible biological bonds

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15
Q

What is Mass?

A

scalar quantity of matter

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16
Q

What is Stress (N/mm^2 or MPa)?

A

force divided by cross-sectional area

17
Q

What is Density (kg/m^3)?

A

mass per unit volume [ρ]

18
Q

What is Elastic modulus (GPa or GN/m^2)?

A
  • the slope of the linear elastic part of the stress- strain curve
  • Young’s modulus [E] describes tension or compression
  • Shear modulus [G] describes shear loading
19
Q

What is Poisson’s ratio?

A

ratio of lateral axis strain in axial loading

20
Q

What is axial loading?

A

applying a force on a structure directly along an axis of the structure

21
Q

What does strength(MaP or MN/m^2) mean?

A

-Indicated by sigma f
-depends on material class (materials, polymers, etc)
-depends on mode of loading (tension, compression, shear, etc)

22
Q

What is force?

A

vector quantity causing a change in the position of a body

23
Q

What is weight?

A

force with which the Earth attracts a body

24
Q

What is toughness(kJ/m^2)?

A

resistance of material to the propagation of a crack

25
Q

Define propagation?

A

wave movement

26
Q

Name some engineering alloys

A

Aluminium alloys
Copper alloys
Lead alloys
Magnesium alloys
Molybdenum alloys
Nickel alloys Steels
Tin alloys
Titanium alloys
Tungsten alloys
Zinc alloys

27
Q

Name some Engineering Polymers
(the thermoplastics and thermosets of engineering)

A

Epoxies
Melamines
Polycarbonate
Polyesters
Polyethylene, high density Polyethylene, low density Polyformaldehyde Polymethylmethacrylate Polypropylene Polytetrafluorethylene Polyvinylchloride

28
Q

Name some Engineering Ceramics
(fine ceramics capable of load-bearing application)

A

Alumina
Diamond
Sialons
Silicon carbide
Silicon nitride
Zirconia

29
Q

Name some Engineering Composites
(the composites of engineering practice)

A

Carbon fibre reinforced polymer
Glass fibre reinforced polymer
Aramid fibre reinforced polymer

30
Q

Name some Porous Ceramics
(traditional ceramics, cements, rocks and minerals

A

Brick
Cement
Common rocks
Concrete
Porcelain
Pottery

31
Q

Name some Glasses
(ordinary silicate glass)

A

Borosilicate glass
Soda glass
Silica

32
Q

Name some Woods

A

Ash
Balsa
Fir
Oak
Pine
Wood products (ply, etc.)

33
Q

Elastomers
(natural and artificial rubbers)

A

Natural rubber
Hard butyl rubber
Polyurethanes
Silicone rubber
Soft butyl rubber

34
Q

Name some Polymer foams
(foam polymers of engineering)

A

Cork
Polyester
Polyestyrene
Polyurethane

Engineering Applications 3004 (11 decks)

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