The crack pattern at failure due to torsion is
- AVertical
- BDiagonal at ends
- CSpiralCorrect
- DCircular
Solution
Concept
Torsion cracks
Step-by-step solution
1. Torsion produces diagonal tension on all faces. 2. Cracks spiral around the member.
Explanation
Principal tensile stress is inclined at 45°.
Why the other options are wrong
Vertical cracks are caused by bending.
Shortcut
Torsion = spiral cracks.
Correct answer: C) Spiral