Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

M6 > 6.0 - Introduction > Flashcards

6.0 - Introduction Flashcards

1
Q

What is defined by the “Strength of a Material”?

A

The relations between external forces applied to an elastic body and the deformations and internal stresses resulting from those applied forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the unit of measurement for “Density”?

A

The density of an object is a measure of mass per unit volume and is measured in kg/m3.

Generally, for a given volume, the more dense an object is, the heavier it will be.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is “Fatigue” of a material?

A

When a metal is subjected to cyclic loadings, it will start to crack. This type of failure is known as FATIGUE!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Where does Fatigue of a material usually start from?

A

Fatigue usually starts at a stress concentrator such as a scratch or sharp indentation and can rapidly increase.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does the term “Elasticity” mean on a material?

A

A body is said to be perfectly elastic if, after it has been deformed by external forces, it returns completely to its original shape when the forces are removed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the unit for Stress?

A

Newtons per square metre (N/m2) or Pascals (Pa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does Newtons per square metre (N/m2 differ from Pascals (Pa)

A

It doesn’t, both have equal value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is combined stress?

A

Tensile & Shear

Compressive & Shear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is simple stress?

A

When tensile, compressive or shearing stress act alone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Strain?

A

The amount of deformation of a dimension of a body resulting from the application of a load divided by the original dimension of the body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is Poisson’s Ratio?

A

The negative ratio of lateral strain to longitudinal unit strain for a given material subjected to uniform longitudinal stress within the proportional limit.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What Is Hardness of a material?

A

Resist to penetration, wear or cutting action.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is Strength of a material?

A

Withstand forces which tend to deform the metal in any direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is Elasticity of a material?

A

The ability of an object or material to be stretched and recover its size and shape after deformation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is Plasticity of a material?

A

The property of a metal which allows it to be reshaped.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is Ductility of a material?

A

The property which allows metal to be drawn into thinner sections without breaking.

17
Q

What is Malleability of a material?

A

That characteristic of material that allows it to be stretched or shaped by beating with a hammer or passing through rollers without breaking.

18
Q

What is Toughness of a material?

A

The property of a metal which allows it to be deformed without breaking.

19
Q

What is Brittleness of a material?

A

The property of a metal to break when deformed or hammered. It is the resistance to change in the relative position of the molecules within the material.

20
Q

What is conductivity of a material?

A

The characteristic of a material which makes it possible for it to transmit heat or electricity.

21
Q

What is Durability of a material?

A

The property of metal that enables it to withstand force over a period of time.

22
Q

What do Non-Ferrous metals not contain?

A

Iron

23
Q

What do Metallic materials contain?

A

Metal

24
Q

What is the yield strength, and where would you find it on the graph?

A

Maximum stress a material can take before going into the plastic limit. (First Curve on Graph)

25
Q

How many “Basic” types of metal are there

A

70

26
Q

What density of metals are used in aircraft?

A

5kg/dm3 - Lightweight metals?

27
Q

What are the three most important metals in an aircraft structure?

A
  • Aluminium and aluminium alloys
  • Titanium and titanium alloys
  • Magnesium and magnesium alloys
28
Q

Where would Heavy Metals be permissible on an aircraft?

A

Where high weights or higher strengths are needed

29
Q

How many atoms does a

body centred cubic (BCC) consist of?

A

9 - One is at each corner of the cube and one in the centre.

30
Q

How many atoms does a

face centred cubic (FCC)

A

14 - One atom is at each cube corner and one is in the centre of each face

31
Q

What type of metals have FCC form?

A

Aluminium, copper, gold, nickel, silver and Iron are examples of metals that have the FCC form.

32
Q

At what temperature does Iron change from BCC to FCC?

A

910°C

33
Q

How many atoms does

hexagonal close packed (HCP) consist of?

A

17

34
Q

What metals have HCP construct?

A

Cobalt, magnesium, titanium and zinc

35
Q

What should materials be a compromise of?

A

Quality and cost

36
Q

What was the change in aluminium use in a Boeing from 1990 to 2010?

A

1990 - 78%

2010 - 20%

M6 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions