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Module 6: Materials > General > Flashcards

General Flashcards

1
Q

What does the strength of materials deal with?

A

The relationship between external forces, deformation and internal stresses.

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2
Q

What is the formula for strength of material qualifications based on?

A

Mathematical analyses

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3
Q

What is density?

A

A measure of mass per unit volume

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4
Q

What unit is density

A

Kg/m3

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5
Q

Why is aluminium preferred to steel?

A

It is less dense

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6
Q

What is fatigue?

A

Starts off as a stress concentrator (scratch) and can rapidly increase

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7
Q

What is elasticity?

A

When a body has been deformed, it then returns back to its original shape when the forces are removed

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8
Q

What is stress?

A

The force per unit area

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9
Q

Si Unit for force

A

N/m2 or pascals

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10
Q

What is the imperial unit for stress

A

Psi

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11
Q

If a material can withstand a lot of stress it is said to be…?

A

Strong

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12
Q

Why is tensile stress

A

Stretch or lengthening

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13
Q

What is compressive stress

A

Compressing or shortening

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14
Q

What is shearing stress

A

To shear the material

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15
Q

What is combined stress

A

More than one form of stress acting on an object

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16
Q

What is simple stress?

A

One form of stress

17
Q

What is unit strain

A

Deformation / original dimension

18
Q

What is poisons ratio?

A

Lateral strain / longitudinal strain

19
Q

Define hardness

A

A material to resist penetration, wear or cutting action

20
Q

Define strength

A

Material to withstand deformation or stress without breaking

21
Q

Define plasticity

A

A metal allows it to be re shaped

22
Q

Define Ductility

A

Allows a metal to be drawn into thinner sections without breaking

23
Q

Define malleability

A

Allows the material to be stretched or shaped without breaking

24
Q

Define toughness

A

Metal which allows it to be deformed without breaking

25
Q

Define brittleness

A

Property of a metal to break when deformed

26
Q

Define conductivity

A

Material which is possible for it to transmit heat or electricity

27
Q

Define durability

A

Withstand force over time

28
Q

Define metallic materials

A

Having the nature of metal or containing metal

29
Q

Define non metallic materials

A

Materials not containing metal

30
Q

Define ferrous materials

A

Iron or any alloy containing iron

31
Q

Define Non ferrous metals

A

Metals containing no iron

Module 6: Materials (6 decks)

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