Multiple choice

The major and minor principal stresses at a point are 3 MPa and -3 MPa respectively. The maximum shear stress at the point is

  1. zero

  2. 3 MPa

  3. 6 MPa

  4. 9 MPa
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Maximum shear stress

$= \frac{\sigma_1 - \sigma_2}{2} = \frac{3 - (-3)}{2} \frac{6}{2} = 3 MPa$

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