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+//Strength Of Material By G.H.Ryder
+//Chapter 2
+//Example 3
+//To find loads fo designing double cover butt joint and to find its efficiency
+clc();
+
+//Initialization of Variables
+P=25000;   //Load , Unit in Kg
+b=20.5;   // width of each plate to be joined, Unit in cm
+t=1.25;    //Thickness of each plate to be joined, Unit in cm
+d=1.9;    // Diameter of rivets , Unit in cm
+Tau=75;    // Permissible Shear Stress, Unit in N/mm^2
+SigmaC=180;// Permissible bearing pressure, Unit in N/mm^2
+Sigma=105; //Permissible tensile stress, Unit in N/mm^2
+g=9.81;   //acceleration due to gravity, Uint in m/sec^2
+
+//Calculations
+t1=5*t/8;   //Thickness of cover plate, unit in cm
+ShearLoadRivet=Tau*2*(%pi)*(d*10)^2/(4*g);// Load to shear one Rivet, Unit in Kg
+CrushLoadRivet=SigmaC*d*10*t*10/g;   // Load to crush one rivet, unit in Kg
+n=P/ShearLoadRivet;  // Number of rivets required
+n=ceil(n);  //Rounding off Number of rivets to next whole number
+Load=Sigma*b*10*t*10/g;  // Load which can be carried by solid plate, Uint in Kg
+
+//(i)
+ ShearLoadAll=n*ShearLoadRivet;  //Load to shear all the rivets, Unit in Kg,    The answer provided in the textbook is wrong
+ //(ii)
+ CrushLoadAll=n*CrushLoadRivet;   //Load to crush all the rivets, Unit in kg  ,            The answer provided in the textbook is wrong
+ //(iii)
+ Load1=Sigma*(b*10-d*10)*t*10/g;   //permissible load for plate to tear through section AA, Unit in Kg,      The answer provided in the textbook is wrong
+ //(iv)
+ Load2=Sigma*(b*10-2*d*10)*t*10/g+ShearLoadRivet;  //permissible load for plate to tear through section BB, At the same time shearing rivets at AA, Unit in Kg,     The answer provided in the textbook is wrong
+ 
+//(v)
+Load3=Sigma*(b*10-3*d*10)*t*10/g+3*ShearLoadRivet;// permissible load for plate to tear through section CC, At the same time shearing three rivets at AA and BB,  Unit in Kg,              The answer provided in the textbook is wrong
+//(vi)
+Load4=Sigma*(b*10-3*d*10)*2*t1*10/g;  //permissible load for plate to tear through section CC, unit in Kg,      The answer provided in the textbook is wrong
+
+Eff=P*100/Load;// Efficiency of joint in percentage,      The Answer vary due to round off error
+
+
+//Results
+printf("For the design of Double Cover butt Joint:\n\t") 
+printf("Load to shear one Rivet=%.fKg\n\t",ShearLoadRivet)       //The answer provided in the textbook is wrong
+printf("Load to crush one rivet=%.fKg\n\t",CrushLoadRivet)       //The answer provided in the textbook is wrong
+printf("Load to shear all the rivets=%.fKg\n\t",ShearLoadAll)      //The answer provided in the textbook is wrong
+printf("Load to crush all the rivets=%.fKg\n\t",CrushLoadAll)     //The answer provided in the textbook is wrong
+printf("permissible load for plate to tear through section AA=%.fKg\n\t",Load1)     //The answer provided in the textbook is wrong
+printf("permissible load for plate to tear through section BB, At the same time shearing rivets at AA=%.fKg\n\t",Load2)     //The answer provided in the textbook is wrong
+printf("permissible load for plate to tear through section CC, At the same time shearing three rivets at AA and BB=%.fKg\n\t",Load3)   //The answer provided in the textbook is wrong
+printf("permissible load for plate to tear through section CC=%.fKg\n",Load4)   //The answer provided in the textbook is wrong
+printf("Efficiency  Of Joint=%.1fpercent",Eff)//The Answer vary due to round off error
+