A Mohr's circle reduces to a point when the body is subjected to
- A. Pure shear
- B. Uniaxial stress only
- C. Equal & opposite axial stresses on two mutually perpendicular planes
- D. Equal axis stresses are on two mutually perpendicular planes, the planes being free of shear.
Answer: D. Equal axis stresses are on two mutually perpendicular planes, the planes being free of shear.
Explanation: If $\sigma_x = \sigma_y$ and $\tau_{xy} = 0$, radius $R = \sqrt{\frac{(\sigma_x - \sigma_y)^2}{4} + \tau_{xy}^2} = 0$.