railway RRB JE (CBT I + CBT II) Mock Test 2024 Strength of Materials Simple Stress and Strain Stress-Strain Diagram
Which of the following is not the characteristic of stress-strain curve for mild steel?
1
The stress is proportional to the strain up to the proportional limit.
2
Percentage reduction in area may be as high as 60-70%.
3
A neck is formed due to high stress level.
4
During plastic stage no strain hardening takes place.