Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is _____________ the longitudinal stress?
Correct answer: C. Twice
- A. Half
- B. Equal to
- C. Twice
- D. Eight times
Explanation
For a thin cylindrical vessel, hoop stress is pD/(2t), whereas longitudinal stress is pD/(4t). Therefore, the circumferential stress is twice the longitudinal stress and usually governs shell thickness.
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