-->//(Design against Fluctuating Load) Example 5.9
 
-->//Refer Fig.5.34 on page 164
 
-->//Bending moment acting at section X-X Mb (kN-m)
 
-->Mb = 500
 Mb  =
 
    500.  
 
-->//Ultimate tensile strength of shaft material Sut (MN/m2)
 
-->Sut = 500
 Sut  =
 
    500.  
 
-->//Minimum value of N is Nmin
 
-->Nmin = (10^3)
 Nmin  =
 
    1000.  
 
-->//Maximum value of N is Nmax
 
-->Nmax = (10^6)
 Nmax  =
 
    1000000.  
 
-->//Yield point of shaft material Syt (MN/m2)
 
-->Syt = 350
 Syt  =
 
    350.  
 
-->//Endurance limit in bending for specimen Sdash (MN/m2)
 
-->Sdash = 210
 Sdash  =
 
    210.  
 
-->//Specimen shaft diameter ds (mm)
 
-->ds = 7.5
 ds  =
 
    7.5  
 
-->//Notch sensitivity factor q
 
-->q = 0.8
 q  =
 
    0.8  
 
-->//Fillet radius rf (mm)
 
-->rf = 8
 rf  =
 
    8.  
 
-->//Shaft diameter d (mm)
 
-->d = 300
 d  =
 
    300.  
 
-->//Theoretical stress concentration table
 
-->ratioVal = {0.025 0.05 0.1}
 ratioVal  =
 
    0.025    0.05    0.1  
 
-->Ktval = {2.6 2.05 1.66}
 Ktval  =
 
    2.6    2.05    1.66  
 
-->//Reliability (%)
 
-->reliability = 90
 reliability  =
 
    90.  
 
-->//Operation
 
-->    //Nomenclature: 
 
-->    //1 - Ground
 
-->    //2 - Machined or cold drawn
 
-->    //3 - Hot-rolled
 
-->    //4 - Forged
 
-->op = 2
 op  =
 
    2.  
 

The life of the shaft is 17219.681605 cycles

Answer is slightly different because of use of equation 5.18
Use value of Ka from Fig.5.24 in order to obtain the mentioned result