A machine element XY, fixed at end X, is subjected to an

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A machine element XY, fixed at end X, is subjected to an axial load P, transverse load F, and a twisting moment T at its free end Y. The most critical point from the strength point of view is

1. a point on the circumference at location Y
2. a point at the center at location Y
3. a point on the circumference at location X
4. a point at the center at location X

Correct Option: C

At centre σ_b = 0 and torsional shear stress are zero.