Deforming force
A force which the changes the size or shape of abody
Elasticity
If a body regains its original shape and size after the removal of a deforming force, it is called an cleastic body and its property is called elasticity.
Plasticity
If a body doesn’t regain its original size and shape even after the removal of a deforming force, it is called a plastic body and its property is called elasticity
Perfectly elastic body
A body which regains its size and shape completely and immediately after the removal of a deforming force.
Perfectly plastic body
A body which doesn’t show any tendency to regain its original shape and size after the removal of a deforming force.
Stress
The internal restoring force set up per unit area of a deformed body. Stress = force/area.
Types of stress
Strain
Types of strain
Elastic limit
Hooke‘s law
Modulus of elasticity
Young’s modulus
Bulk modulus
Modulus of rigidity
Poisson ratio
Stress strain curve
Classification of material on the basis of stress strain curve
Elastic hysteresis
