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+clear
+//
+//
+
+//Given
+//Variable declaration
+P=9*1000 //Axial pull in N
+F=4.5*1000 //Shear force in N
+sigmat_star=225 //Elastic limit in tension in N/sq.mm
+Sf=3 //Factor of safety
+mu=0.3 //Poisson's ratio
+sigma3=0 //third principle stress
+
+//Calculation
+sigmat=sigmat_star/Sf
+sigma=(P/(%pi/4))
+tau=(F/(%pi/4))
+sigma1=((tau)+int((sqrt((sigma/2)**2+tau**2))))
+
+sigma2=((tau)-int((sqrt((sigma/2)**2+tau**2))))
+
+d=(((((sigma1-sigma2)**2+(sigma2-sigma3)**2+(sigma3-sigma1)**2)/(2*(sigmat**2)))**(1/4)))
+
+
+//Result
+printf("\n Diameter of the bolt = %0.3f mm",d)