In a strained body, three principal stresses at a point are denoted by $σ_{1,} σ_{2}$ and $σ_{3}$ such that $σ_{1} > σ_{2} > σ_{3}$ . If $σ_{0}$

denoted yield stress, then according to the maximum shear stress theory

- 1
  
  $σ_{1} - σ_{2} = σ_{0}$
- 2
  
  $σ_{1} - σ_{3} = σ_{0}$
- 3
  
  $σ_{2} - σ_{3} = σ_{0}$
- 4
  
  $\frac{σ_{1} + α_{3}}{2} = σ_{0}$

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