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Circular beam - average shear stress = 0.75 maximum shear stress.
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Strength of Materials
Q. The average shear stress in a beam of circular section is _______ times the maximum shear stress.
- Published on 21 Sep 15
a.
0.75
b.
1.5
c.
4/3
d.
equal
ANSWER: 0.75
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Discussion
Sravanthi
-Posted on 24 Nov 15
- Maximum shear stress over a circular section is given as
τ = (4/3) (S/A)
here, S is the shear force and A is the area of circle
But S/A is the average shear stress, therefore τ = (4/3) τ
_{avg}
τ
_{avg}
= (3/4) τ
τ
_{avg}
= 0.75 τ
Hence, the average shear stress in a beam of circular section is 0.75 times the maximum shear stress.
➨
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