Sketch using the same axes, stress-strain curves for ductile material and for rubber and explain the shape of the graphs

Explanations

Rubber does not obey Hooke’s law except for a very small range; it stretches easily without breaking and has a greatest range of elasticity. It does not undergo plastic deformation

Unstretched rubber consist of coiled molecules when a tensile force is applied, they uncoil, become straight and hard. Any further increase in tensile force makes the rubber to break.

Dr. Bbosa Science