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+// exa 4.3 Pg 105
+clc;clear;close;
+
+// Given Data
+Sut=440;//MPa
+d=25;//mm
+R=95/100;// reliability
+Kt=1.8;// stress concentration factor
+q=0.86;// sensitivity factor
+
+Se_dash = 0.5*Sut;// MPa
+
+// for machined surface
+ka=0.82;// surface finish factor
+kb=0.85;// size factor
+kc=0.868;// reliability factor
+kd=1;// temperature factor
+ke=0.577;// load factor
+
+Kf=1+q*(Kt-1);// fatigue strength factor
+kf=1/Kf ;// fatigue strength reduction factor
+Se=ka*kb*kc*kd*ke*kf*Se_dash;// (MPa) Endurance limit
+printf('\n Endurance limit = %.2f MPa',Se)
+
+