Definitions of Materials Flashcards

1
Q

Elastic

A

Returns to unstretched form when stresses are removed

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2
Q

Plastic

A

When stretched will remain in new shape (Plastic deformation)

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3
Q

Opposite of elastic

A

Plastic

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4
Q

Opposite of plastic

A

Elastic

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5
Q

Brittle

A

Undergoes little to no plastic deformation before fracture
Fails by cracking

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6
Q

Tough

A

Absorbs a lot of energy before fracture (deforms plastically)

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7
Q

Opposite of brittle

A

Tough

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8
Q

Opposite of tough

A

Brittle

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9
Q

Strong

A

Takes high stresses before breaking

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10
Q

Opposite of strong

A

Weak

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11
Q

Flexible

A

Low stress needed to change shape

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12
Q

Stiff

A

Small extension per unit force (high young mod)

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13
Q

Opposite of flexible

A

Stiff

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14
Q

Opposite of Stiff

A

Flexible

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15
Q

Hard

A

Does not dent or scratch on impact

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16
Q

Opposite of hard

A

Soft

17
Q

Ductile

A

Can be drawn out into wires

18
Q

Metals are:

A

Strong
Tough
Stiff
Hard
Ductile

19
Q

Ceramics are

A

Brittle
Hard
Stiff
Strong

20
Q

Polymers are

A

Flexible
Plastic
Tough

21
Q

Strain

A

The ratio of an objects extension to its original length. No units

22
Q

Stress

A

The amount of force per CSA on a material. Measured in Pa