railway RRB JE (CBT I + CBT II) Mock Test 2024 Strength of Materials Principal Stress or Strain Principle Stress
When a body is subjected to direct tensile stress (\(\sigma\)) in one plane and accompanied by a single shear (\(\tau\)), the maximum normal stress is
1
\(\frac{\sigma}{2}-\frac{1}{2} \sqrt{\sigma^{2}+4 \tau^{2}}\)
2
\(\frac{\sigma}{2}+\frac{1}{2} \sqrt{\sigma^{2}+4 \tau^{2}}\)
3
\(\frac{\sigma}{2}+\sqrt{\sigma^{2}-4 \tau^{2}}\)
4
\(\frac{\sigma}{2}+\frac{1}{2} \sqrt{\sigma^{2}-4 \tau}\)