Materials

Question 1

Plastic Deformation

Answer 1

Property if a body where it will not return to its original shape after loading

Question 2

Elastic Deformation

Answer 2

Property if a body where it will return to its original shape after loading

Question 3

Limit of proportionalIty

Answer 3

The point on a curve extension graph where force is no longer proportional to extension

Question 4

Elastic limit

Answer 4

Beyond this point the material exhibits plastic deformation

Question 5

Fracture

Answer 5

The point in a force extension graph where the material breaks

Question 6

Tensile Force

Answer 6

This causes tension in an object I.e causes it to extend

Question 7

Compressive force

Answer 7

This causes compression in an object I.e causes it to compress

Question 8

Extension

Answer 8

The difference between a materials original length and its new length under loading

Question 9

Hooke’s Law

Answer 9

This states that the extension of an object is proportional to the force that causes it, provided the elastic limit is not exceeded

Question 10

Force Constant (spring constant or stiffness constant)

Answer 10

This tells us the stiffness of a specific sample of material, the force required to extend it by 1m measured in Nm^-1