For the bolted bracket connection shown in figure, the force (in kN round off to two decimals) experienced by bolt 3 will be ____.
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=Tr∑r2 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)2−2×40×125×0.8 [∵cos(90+θ)=−cosθ] =96.05kN