Unit 1 - Materials

Question 1

The 6 key material selection parameters

Answer 1

1. Bulk Material Properties
2. Surface Properties
3. Non-Mechanical Properties
4. Economic Properties
5. Manufaturing Properties
6. Aesthetic Properties

Question 2

Define Bulk Mechanical Properties, with 5 examples

Answer 2

A physical property of the material that does not depend on its shape and size.

1. Density
2. Elastic Moduli
3. Strength
4. Creep
5. Toughness

Question 3

Define Surface Properties with 4 examples

Answer 3

The properties that affect the functional aspect of a material.

1. Corrosion
2. Oxidation
3. Friction
4. Wear

Question 4

Define Non-Mechanical Bulk Properties with 4 examples

Answer 4

Properties that don’t relate to the physical behaviour of the material.

1. Thermal
2. Electrical
3. Optical
4. Magnetic

Question 5

What are the aspects needed to consider with Economic Properties (4)

Answer 5

1. Are the materials inexhaustible?
2. Are the sensitive in the public eye?
3. Is it local and sustainable?
4. Where can the material be supplied from?

Question 6

What needs to be considered for the Manufacturing Properties of a material

Answer 6

How sensitive the material is to the manufacturing process. And how the material properties will influence the manufacturing process

Question 7

Classification of Solids

Answer 7

An aggregate of matter having a definite volume and shape. They can resist deformation and are capable of sustaining a load without suffering permanent change in shape

Question 8

Classification of Liquids

Answer 8

Have no intrinsic shape and cannot resist deformation.

They are capable of transmitting or sustaining an applied static shear stress.

Question 9

Difference in classifying a liquid and gas

Answer 9

Liquids have definite volume and no intrinsic shape, gases occupy all space given to them.