Civil Engineering MCQAE Level Civil Engineering
The shape factor for a thin-walled hollow circular cross-section is:
Structural AnalysisHollow Circular Shape FactorMEDIUM
Choose the correct answer
A
1.0
B
16/(3π) ≈ 1.70
C
4/π ≈ 1.27
D
1.5
Correct Answer
C. 4/π ≈ 1.27
Why is this the answer?
For a thin-walled circular tube: Z_p = 4r²t and Z_e = πr²t (where r = radius, t = wall thickness). Shape factor = 4r²t/πr²t = 4/π ≈ 1.27.
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