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Draw shear stress distribution along cross-section of circular beam for 300 mm diameter carrying 400 kN shear force. Also determine the ratio of maximum shear stress to average stress.
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 Data- d=300mm,S=400kN  Find qmaxqavg=? R=d2=3002=150mm

R=d2=3002=150mm A=π8×d2=π8×(300)2=35342.92mm2 ¯Y=4R3π=4×1503×π=63.662mm b=d=300mm I=πd464=π×(300)464=397607820.2mm4 qmax=SA¯YbI

qmax=400×103×35342.92.92×63.662300×397607820.2=7.545N/mm2 qavg=SA=400×103π4×(300)2=5.66N/mm2

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