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 diagram of stress and strain graph is attached above ...
Which sufficient amount of heat is given the permanent set changes in to elastic range and after that it changes to elastic limit .
The straight line in curve of graph hold hooks law .Which states that dress is proportional to strain
that is
E = stress/strain
after that the strain increase rapidly and hone a region called plastic region from there body doesnt regain its shape .
