-->//(Threaded Joints) Example 7.22
 
-->//Refer Fig.7.43 and 7.44 on page 265
 
-->//Weight of machine W (kg)
 
-->W = 200
 W  =
 
    200.  
 
-->//Distance between the machine and the mearest point of support dist (m)
 
-->dist = 1
 dist  =
 
    1.  
 
-->//Rotating unbalanced force created by the machine F (N)
 
-->F = 2000
 F  =
 
    2000.  
 
-->//Speed of rotation n1 (rpm)
 
-->n1 = 14
 n1  =
 
    14.  
 
-->//Weight of channel w (kg/m)
 
-->w = 20
 w  =
 
    20.  
 
-->//Number of bolts N
 
-->N = 2
 N  =
 
    2.  
 
-->//Distance between bolt1 and the nearest point of support l1 (mm)
 
-->l1 = 235 + 35
 l1  =
 
    270.  
 
-->//Distance between bolt2 and the nearest point of support l2 (mm)
 
-->l2 = 35
 l2  =
 
    35.  
 
-->//Ultimate tensile strength Sut (MPa)
 
-->Sut = 960
 Sut  =
 
    960.  
 
-->//Yield tensile strength Syt (MPa)
 
-->Syt = 850
 Syt  =
 
    850.  
 
-->//Endurance limit in bending Sdash (MPa)
 
-->Sdash = 500
 Sdash  =
 
    500.  
 
-->//Fatigue stress concentration factor Kf
 
-->Kf = 3.0
 Kf  =
 
    3.  
 
-->//Factor of safety fs
 
-->fs = 2
 fs  =
 
    2.  
 
-->//Initial pre-load in each bolt Pi (kN)
 
-->Pi = 55
 Pi  =
 
    55.  
 
-->//Assume the stiffness of the bolts to be 1N/mm kb
 
-->kb = 1
 kb  =
 
    1.  
 
-->//Calculate the stiffness of the parts kc
 
-->kc = 3 * kb
 kc  =
 
    3.  
 

Core cross-section area of the bolt(A) = 197.638259 mm2

Design is safe