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A circular beam of 120mm diameter is simply supported over a span of 10m and carries a uniformly distributed load of 1000N/m. Find maximum bending stress produced.
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Given

d = 120 mm, L = 10 m, UDL = 1000 N/m

To Find σb=?

Solution

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ER=MI=σby........(1)

Mmax=WL28=1000×1028=12500Nm=12500×103Nmm

y=d2=1202=60mm

Moment of Inertia (I) = π64D4=10.17×106mm4

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