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+//Strength Of Material By G.H.Ryder
+//Chapter 1
+//Example 10
+//(a) To Calculate exiting stress in steel
+//(b)To Calculate final stress in steel in steel if additional end trust is applied
+
+clc();
+
+//Initialization of variables
+Ds=18; //Diameter of steel rod, Unit in mm
+
+Dc=39; //Outside diameter of copper sleeve, Unit i mm
+dc=24;//Inside diameter of copper sleeve, Unit in mm
+EsbyEc=2;//Ratio of Young's modulus of steel to young's of copper
+d=1.5//depth of copper removed, Unit in mm
+
+
+//Computations
+SigmaS1=10;//Tension stress set up in steel, Unit in N/mm^2
+
+As=(%pi/4)*Ds^2; //Cross section Area of steel rod, Unit in mm^2
+Ac=(%pi/4)*(Dc^2-dc^2); //Cross section Area of copper sleeve, Unit in mm^2
+Acr=(%pi/4)*((Dc-2*d)^2-dc^2); //Area of reduce sectoin of copper, Unit in mm^2
+SigmaC1=(As/Ac)*SigmaS1; //Stress set up in copper tube, Unit in N/mm^2
+
+//(a)When tube reduced in area for half it's length
+//Let SigmaC2 be stress in reduced secton in copper & SigmaCdash in the reminder
+//Let SigmaS2 be stress in rod
+//Equilibrium equation: Load on tube=Load on Rod
+ //SigmaC2*Acr=SigmaC2dash*Ac=SigmaS2*As
+ //SigmaC2=(As/Acr)*SigmaS2......(i)
+ //SigmaC2dash=(As/Ac)*SigmaC2.....(ii)
+
+
+//Compatibility Equation: Reduction in lenght of rod=Reduction in length of tube
+ //(SigmaS1-SigmaS2)*l/Es=(SigmaC2-SigmaC1)*l/(2*Ec) + (SigmaC3dash-SigmaC1)*l/(2*Ec)
+
+//Solving Equilibrium Equations and compatibility equation
+SigmaS2=(SigmaS1+EsbyEc*SigmaC1)/(1+As*EsbyEc/(2*Acr)+As*EsbyEc/(2*Ac)); //Unit in N/mm^2 The answer vary due to round off error
+
+//Result (a)
+printf("The exiting stress in steel, SigmaS2= %.1fN/mm^2\n",SigmaS2)
+
+
+
+//(b)An additonal end thrust of 5000N is applied
+
+P=5000;//Additonal end thrust, Unit in N
+//Let SigmaS3 And SigmaC3 be stresses in reduce section of steel and copper respectively
+//Let SigmaC3dash be stress in remainder section of copper
+
+
+ //Equlibrium Equation:
+ //P=SigmaC3*Acr-SigmaS3*As
+ //SigmaC3=P/Acr+(As/Acr)*SigmaS3............(iii)
+ //SigmaC3dash=P/Ac+(As/Ac)*SigmaS3............(iv)
+
+
+SigmaS3=(SigmaS1+EsbyEc*SigmaC1-(EsbyEc/2)*(P/Acr+P/Ac))/(1+EsbyEc*As/(2*Acr)+EsbyEc*As/(2*Ac)); //Unit in N/mm^2, The answer vary due to round off error
+
+//Result (b)
+printf("Final Stress in Steel,SigmaS3=%.1f N/mm^2",SigmaS3)