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+-->//(Threaded Joints) Example 7.21
+ 
+-->//Maximum internal pressure MAXP (MPa)
+ 
+-->MAXP = 2
+ MAXP  =
+ 
+    2.  
+ 
+-->//Minimum internal pressure MINP (MPa)
+ 
+-->MINP = 0
+ MINP  =
+ 
+    0.  
+ 
+-->//Diameter of the circle on which pressure acts D (mm)
+ 
+-->D = 400
+ D  =
+ 
+    400.  
+ 
+-->//Assume the stiffness of the bolts to be 1N/mm kb
+ 
+-->kb = 1
+ kb  =
+ 
+    1.  
+ 
+-->//Calculate the stiffness of the parts kc (N/mm)
+ 
+-->kc = 4 * kb
+ kc  =
+ 
+    4.  
+ 
+-->//Ultimate tensile strength Sut (N/mm2)
+ 
+-->Sut = 900
+ Sut  =
+ 
+    900.  
+ 
+-->//Yield strength Syt (N/mm2)
+ 
+-->Syt = 700
+ Syt  =
+ 
+    700.  
+ 
+-->//Endurance limit in bending Sdash (N/mm2)
+ 
+-->Sdash = 300
+ Sdash  =
+ 
+    300.  
+ 
+-->//Fatigue stress concentration factor Kf
+ 
+-->Kf = 2.2
+ Kf  =
+ 
+    2.2  
+ 
+-->//Factor of safety fs
+ 
+-->fs = 1.5
+ fs  =
+ 
+    1.5  
+ 
+-->//Number of bolts N
+ 
+-->N = 8
+ N  =
+ 
+    8.  
+ 
+-->//Assume expected reliability (%)
+ 
+-->reliability = 90
+ reliability  =
+ 
+    90.  
+ 
+-->//Assume diameter of the bolt to be less than 7.5mm for Kb to be 1
+ 
+-->d = 1
+ d  =
+ 
+    1.  
+ 
+-->//As Ka is incorporated into Kf, assume the assembly to be ground
+ 
+-->//This is just to obtain a random value of Ka
+ 
+-->op = 1
+ op  =
+ 
+    1.  
+ 
+
+Core cross-section area of the bolt(A) = 85.172067 mm2
+ 
+\ No newline at end of file