Materials

Question 1

Elastic limit

Answer 1

The point when the material stops behaving elastically and starts behaving plastically so it does not return to its original length when the force causing deformation is removed

Question 2

Yield point

Answer 2

When the material suddenly starts to stretch without any extra load (large increase stress, for a small increase strain)

Question 3

Elastic deformation

Answer 3

When a material being stretched would return to its original length when the force causing deformation had been removed.

Question 4

Plastic Deformation

Answer 4

When a material being stretched has permanently been deformed and will not go back to its original length

Question 5

Breaking stress

Answer 5

The point at which the material breaks

Question 6

The limit of proportionality

Answer 6

The point beyond which Hooke’s law no longer applies when stretching a material (the point where the graph curves)