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Question

For the bolted bracket connection shown in figure, the force (in kN round off to two decimals) experienced by bolt 3 will be ____.
  1. 95

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Solution

The correct option is A 95
cosθ=60100=0.6
sinθ=0.8
Direct force in bolt 3, FD=2005=40kN
Force due to torsion, FT=Trr2
r=(60)2+(80)2=100mm
FT=200×250×100×1034×(100)2=125kN
Resultant force on bolt 3(Fr)=(FD)2+(FT)2+2FDFTcos(90+θ)
=(40)2+(125)22×40×125×0.8
[cos(90+θ)=cosθ]
=96.05kN

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