Solution to Exercise 4.5

    % This script uses readings from a Tensile test and
% Computes Strain and Stress values
clc                           % Clear screen
disp('This script uses readings from a Tensile test and')
disp('Computes Strain and Stress values')
disp(' ')                     % Display a blank line
Specimen_dia=12.7; % Specimen diameter in mm
% Load in kN
Load_kN=[0;4.89;9.779;14.67;19.56;24.45;...
    27.62;29.39;32.68;33.95;34.58;35.22;...
    35.72;40.54;48.39;59.03;65.87;69.42;...
    69.67;68.15;60.81];
% Gage length in mm
Length_mm=[50.8;50.8102;50.8203;50.8305;...
    50.8406;50.8508;50.8610;50.8711;...
    50.9016;50.9270;50.9524;50.9778;...
    51.0032;51.816;53.340;55.880;58.420;...
    60.96;61.468;63.5;66.04];

% Calculate x-sectional area im m2
Cross_sectional_Area=pi/4*((Specimen_dia/1000)^2);
% Calculate change in length, initial lenght is 50.8 mm
Delta_L=Length_mm-50.8;
% Calculate Stress in MPa
Sigma=(Load_kN./Cross_sectional_Area)*10^(-3);
% Calculate Strain in mm/mm
Epsilon=Delta_L./50.8;
str = ['Specimen diameter is ', num2str(Specimen_dia), ' mm.'];
disp(str);
Results=[Load_kN Length_mm Delta_L Sigma Epsilon];
% Tabulated results
disp(' Load Length Delta L Stress Strain')
disp(Results)

This script uses readings from a Tensile test and
Computes Strain and Stress values

Specimen diameter is 12.7 mm.
        Load    Length   Delta L     Stress   Strain
           0    50.8000        0          0       0
      4.8900    50.8102   0.0102    38.6022   0.0002
      9.7790    50.8203   0.0203    77.1964   0.0004
     14.6700    50.8305   0.0305   115.8065   0.0006
     19.5600    50.8406   0.0406   154.4086   0.0008
     24.4500    50.8508   0.0508   193.0108   0.0010  
     27.6200    50.8610   0.0610   218.0351   0.0012
     29.3900    50.8711   0.0711   232.0076   0.0014
     32.6800    50.9016   0.1016   257.9792   0.0020
     33.9500    50.9270   0.1270   268.0047   0.0025
     34.5800    50.9524   0.1524   272.9780   0.0030
     35.2200    50.9778   0.1778   278.0302   0.0035
     35.7200    51.0032   0.2032   281.9773   0.0040
     40.5400    51.8160   1.0160   320.0269   0.0200
     48.3900    53.3400   2.5400   381.9955   0.0500
     59.0300    55.8800   5.0800   465.9888   0.1000
     65.8700    58.4200   7.6200   519.9844   0.1500
     69.4200    60.9600  10.1600   548.0085   0.2000
     69.6700    61.4680  10.6680   549.9820   0.2100
     68.1500    63.5000  12.7000   537.9830   0.2500
     60.8100    66.0400  15.2400   480.0403   0.3000