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Aircraft Materials Construction and Repair > Properties of Material > Flashcards

Properties of Material Flashcards

1
Q

Engineering Materials

A

metals, polymers, elastomers, ceramics, glasses, hybrids

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2
Q

have relatively high elastic moduli

A

metals

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3
Q

have high moduli but brittle

A

ceramics

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4
Q

non-crystalline solids

A

glasses

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5
Q

have moduli that are low, roughly 50 times lower than metals but can be nearly as strong as metals

A

polymers

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6
Q

long-chain polymers above their glass-transition temperature

A

elastomers

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7
Q

combination of two or more materials in a predetermined configuration and scale

A

hybrids

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8
Q

most - when pure - are soft and can be easily deformed; can be made strong by alloying and by mechanical and heat treatment but remain ductile

A

metals

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9
Q

no ductility; low tolerance for stress concentrations or for high-contact stresses

A

ceramics

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10
Q

most common glasses

A

soda-lime, borosilicate glasses

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11
Q

hard, brittle, and corrosion-resistant

A

ceramics & glasses

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12
Q

ductile, tough, and good thermal and electrical conductors

A

metals

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13
Q

light, easily shaped, and electrical insulators

A

polymers

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14
Q

have the ability to deform elastically to large stains

A

elastomers

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15
Q

ability of a material to stand up to forces being applied without it bending, breaking, shattering, or deforming in any way

A

hardness

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16
Q

property of resisting penetration or permanent distortion

A

hardness

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17
Q

the ability of a material to withstand cracks; characteristic of a material that does not break or shatter when receiving a blow or under a sudden shock

A

toughness

18
Q

affected by the rate of loading, temperature, and notch effect

A

toughness

19
Q

affected by the strength and plasticity of the material

A

hardness

20
Q

property of returning to the original shape when causing the change of shape is removed

A

elasticity

21
Q

ability of a material to absorb force and flex into different directions, returning to its original position

A

elasticity

22
Q

reached when the graph line in force-extension graph starts to curve

A

elastic limit

23
Q

ability of a material to be changed in shape permanently

A

plasticity

24
Q

ability of a material to be reshaped in all directions without cracking; easy to beat into a thin sheet

A

malleability

25
Q

property of metals which allows them to be bent or permanently distorted without rupture

A

malleability

26
Q

property of metals which allows them to be drawn out without breaking

A

ductility

27
Q

ability of a material to change shape usually by stretching along its length; how easily a material can be worked

A

ductility

28
Q

ability of a material to resist applied stress before failure without deformation

A

stiffness

29
Q

resistance to elastic deformation; ability to resist bending

A

stiffness

30
Q

ability of a metal to become liquid by the application of heat

A

fusibility

31
Q

property which enables a metal to carry heat or electricity; important for fusion and to control expansion and contraction

A

conductivity

32
Q

reactions produced in metals as the result of heating or cooling

A

contraction and expansion

33
Q

weight of a unit volume of a material; important consideration for weight and balance

A

density

34
Q

property of a metal which allows little bending or deformation without shattering; not a very desirable property

A

brittleness

35
Q

necessary in sheet metal that is worked into curved shapes such as cowlings, fairings, or wingtips

A

malleable

36
Q

greatly preferred for aircraft use because of their case of forming and resistance to failure under shock loads

A

ductility

37
Q

desirable property in aircraft metals

A

toughness

38
Q

important consideration when choosing a material to be used in the design of a part in order to maintain the proper weight and balance of the aircraft

A

density

39
Q

must be considered in conjunction with bonding, to eliminate radio interference

A

conductivity

40
Q

affect the design of welding jigs, castings, and tolerances

A

contraction and expansion

Aircraft Materials Construction and Repair (3 decks)

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