Material Selection

Question 1

What are the Physical properties?

Answer 1

-Density
-Colour
-Electrical Conductivity (Conductor/Insulator)
-Thermal Conductivity

Question 2

What are the Mechanical properties?

Answer 2

-Strength- The material’s ability to withstand force without breaking or permanently bending
Different types:
-Compressive Strength- materials ability to withstand push forces that try to crush/ shorten it.

-Bending- Force applied to material in order to bend it.

-Shear force- Force that subjects materials to sliding action across their surfaces. Eg, hinges, scissors- involve 2 or more blades sliding across each other.

-Torsional Force- Ability to twist

-Plasticity- ability of an object/ material to permanently change shape- result of applied forces, without cracking/ breaking- increases with heat.

-Toughness- ability to withstand sudden shocks/ blows.

-Hardness- ability to resist indention.

-Durability- the ability to withstand wear and tear and deterioration as a result of weathering. Causes a material to weaken as well as altering appearance.

-Brittleness- tend to beak and shatter before deforming. Opposite of plasticity.

Question 3

Material Availability?

Answer 3

Woods:
-Sheet
-Rod
-Plank

Metals:
-Sheet
-Box Selection
-Tube
-Rod
-Wire

Plastics:

-Sheet
-Rod
-Tube
-Blocks