Draw stress vs strain graph of a metallic (steel) wire when it is subjected to gradually Increasing stretching force. explain different region of graph?
Answers
Explanation:
In the region OA, the graph is linear showing that stress is proportional to the strain. Thus, in this region Hooke's law is obeyed.
The point D on the graph is known as ultimate tensile strength.
The point E on the graph is known as fracture point,
Stress vs Strain graph
Explanation:
The graph of stress vs strain of a metallic wire when it is subjected to gradually increasing stretching force.
Region of Proportionality : OA is a straight line which show that stress is linearly proportional to strain and the body behaves like a perfectly elastic body in this region.
Elastic Limit : It is defined as the maximum value of the strain for which any body shows the elastic property i.e. after removing deforming force the body will regain its original form.
In the graph shown after point A, if force will continue acting on it, it will deflect from the linearly proportionality behavior.
Point C: After point B, the strain in the wire will increase rapidly and the body will gain plasticity( the wire will no longer be able to regain its original posture).
CD region: Region in CD on the graph on gradual reduction of load. The left over strain on zero load strain is known as a permanent set.
Point E: No further extension in wire will be recoverable after point E.
Point F: This is the breaking point, strain increases near this point . The wire breaks at point F, also known as fracture point. The stress is called breaking stress.
Note: The stress- stain graph image with proper label is attached .
