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Question

A bolted joint has four bolts arranged as shown in figure. the cross sectional area of each bolt is 25 mm2. A torque T=200 Nm is acting on the joint. Neglecting friction due to clamping force, maximum shear stress in a bolt is
  1. 40

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Solution

The correct option is A 40

P1×r+P2r+P3r+P4rT=0

P1=P2=P3=P4 [By symmetry]

4Pr=T

P=T4r=2004×501000=1000 N

Shear stress=TArea=100025=40 N/mm2

= 40 MPa

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