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////Example 1.4 Page No:22
///Find Stress in square rod
//Input data
clc;
clear;
A1=30*30*10^-6; //Area of square rod in mm**2
L1=5; ///Length of square rod in m
Pc=150*10^3; //Axial comperessive load of a rod in kN
E1=215*10^9; //Modulus of elasticity in GN/m**2
//Calculation
sigmac=((Pc)/(A1)); //Stress in square rod
ec=(sigmac)/(E1); //Modulusof elasticity is E1=sigmac/ec ,therefore strain in square rod is
deltaLc=ec*5; ///Therefore shortening of length of the rod
///Output
printf('stress in square rod %f N/m^2',sigmac);
printf('\n');
printf('strain in square rod ec= %f\n',ec);
printf('shortening of length of the rod= %f m \n',deltaLc);
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