explain stress strain and curve
Answers
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
well leveled Stress, strain graph is attached above .
Explanation
A region called permanent set from where the body start heated and after taking sufficient amount of heat the body changes to elastic range and further elastic limit .
From above curve graph the straight line only holds hooks law .
that's is stress is proportional to strain
stress/strain = E (costant)
After that plastic region from their body lost elastic behaviour and strain become large .Body doesn't regain its shape .
