Materials Flashcards
Density
Mass per unit volume.
Hooke’s law
Extension is directly proportional to the force applied given that the environmental conditions remain constant.
Limit of proportionality
The point after which Hooke’s law is no longer observed.
Tensile stress
Force applied per unit cross-sectional area
Tensile strain
Caused by tensile stress. The extension over the original length.
Breaking stress
The value of stress at which the material will break apart.
Plastic
Where a material will experience a large amount of extension as the load is increased.
Brittle
Where a material will extend very little and is likely to fracture at a low extension.
Stress-strain graphs
Describe the behaviour of a material rather than the behaviour of a specific object. They show a materials ultimate tensile stress.
