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+clc;
+clear;
+mprintf('MACHINE DESIGN\n Timothy H. Wentzell, P.E.\n Example 4.3   Page no 68');
+
+P=50;            //[hp] Power transmitted
+N=300;           //[rpm] Speed
+D=10;            //[in] Effective pitch diameter of sprocket
+d=1;             //[in] Diameter of shaft from figure 4.3
+Z=(%pi*d^3)/16;  //[in^3] Section modulus of shaft
+A=(%pi*d^2)/4;   //[in^2] Area of cross section
+
+T=(63000/N)*P;  //[lb*in] Torque required to transmit power
+F=T/(D/2);       //[lb] Driving force in chain
+
+Ss=F/A;          //[lb/in^2] Shear stress in shaft
+
+St=T/Z;          //[lb/in^2] Torsional stress in shaft
+
+S=Ss+St;         //[lb/in^2] Resultant stress
+
+//Note-There is mistake in addition of Ss and St.
+
+//This value would be compared to shear stress allowable for shaft material
+
+mprintf('\n\n The combined stress in 1 inch diameter shaft is %f lb/in^2.',S);