PHYSICS FINALS Flashcards

1
Q

Also known as Normal Stress?

A

AXIAL STRESS

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2
Q

It is the force perpendicular to the cross-sectional
area?

A

AXIAL STRESS

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3
Q

It is the force perpendicular to the cross-sectional
area of the member divided by the cross sectional area?

A

AXIAL STRESS

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4
Q

Units = lb/in^2 or N/m^2?

A

AXIAL STRESS

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5
Q

The deformation increases in proportion to the force?

A

HOOKE’S LAW

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6
Q

If the amount of force is
doubled, the amount of deformation is doubled?

A

HOOKE’S LAW

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7
Q

F = k (deformation), where k is constant depends on material.

A

HOOKE’S LAW

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8
Q

This is where the F and the ẟ are not proportional?

A

PLASTIC REGION

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9
Q

This is where the F and the ẟ are not proportional, but rather a small amount of increase in force produces a large amount of deformation.

A

PLASTIC REGION

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10
Q

The point at which Elastic Region ends?

A

ELASTIC LIMIT

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11
Q

It is the point at which permanent
deformation occurs?

A

ELASTIC LIMIT

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12
Q

It is the point at which permanent deformation occurs, if the force is taken off the sample it will not to its original size and shape.

A

ELASTIC LIMIT

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13
Q

the deformation is no longer directly proportional to the
applied force?

A

PROPORTIONAL LIMIT

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14
Q

The point at which the deformation is no longer directly proportional to the applied force?

A

PROPORTIONAL LIMIT

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15
Q

Hooke’s Law no longer holds.

A

PROPORTIONAL LIMIT

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16
Q

The fractional change in length or Strain (ε) = ẟ/ Lo

A

AXIAL STRAIN

17
Q

Strain has no units, since its length is divided by length, however it is sometimes expressed as in/in’ in some texts.

A

AXIAL STRAIN

18
Q

In the Elastic (Linear) Region, the ratio of stress/strain will be constant since stress is directly proportional to strain.

A

YOUNG’S MODULUS

19
Q

30 X 10 6lb/in^2

A

STEEL

20
Q

10 x 10 6 lb/in^2

A

Al

21
Q

15 x 10 6 lb/in^2

A

Brass