Question

explain stress strain and curve ​

Answer 1

Answer:

Stress Strain Curve

✍ It is the graphical representation of stress versus strain .

\Large \text{Explaination\: For\: Stress\: Strain\: Curve }Explaination For Stress Strain Curve

✍ Explaination For Stress - Strain Curve refer the above Attached File .

✍ when the stress is zero strain is also zero .

✍ When the stress is gradually increased, strain also increases linearly up to a certain point (A) called proportional limit.

✍ Therefore, in the region OA Hool's law is obeyed with in this region the body regains its original state on removal of stress .

✍ Beyond A , the strain increases rapidly upto B. The region AB the strain is permanent on removal of stress .

✍ Then the wire is said to be acquired 'permanent set' . Therefore, in the region AB hooks law is not obeyed .

✍ Beyond B the material exhibits elastic behaviour. i.e in the region BC the material continues to elongate even for small increase in stress . Therefore in the region BC Hooke's law is not obeyed .

✍ If the material is wire, beyond C the wire elongates even if the longitudinal stress is not applied. Finally the wire breaks at the point D called breaking point of the wire

Answer 2

level graph of stress and strain is attached above

Explanation

Hooks law ( Strain is proportional to stress producing it within in elastic limit)

stress/strain = E

which is hold in only streight line of the curve of graph from permanent set to elestic region of graph .

after that the Strain increases rapidly and after a condition it is in plastic region a region from where it doesn't regain its shape .