%%  IDENTIFICATION
% Name: Autar Kaw (Put your name here) 
% Section : 001 (Put Section here) 
% Semester: Fall 2011 
% Due Date & Time: August 29, 2011 (Put due data and time here) 

%%  BACKGROUND
% Title:  I am hard-headed!  Now how hard is my head?
% Background: Hardness of materials is one of the most used material 
% selection factors.  
% Hardness is equated with wear resistance and durability.
% One of the hardness tests is called the Brinell hardness test.
% In this case, a ball is pushed into the surface of the material, 
% and an optical measuring device is used to measure the diameter of the 
% resulting indentation.  
% The diameter of the ball and indentation, and the applied force is then 
% used calculate the Brinell hardness number (HB).
% 
%   HB=L/{(pi*D/2)(D-sqrt[D^2-d^2])} 
% 
% where 
%   L = load, kg
%   D = diameter of indentor, mm
%   d = diameter of indentation, mm
% 

%% SPECIFICATIONS
% Specifications: Write a Matlab Worksheet 
% where the values of L, D, and d, are written in the beginning of the 
% matlab worksheet and then computes and displays the Brinell Hardness.  

%% INPUTS and DISPLAYING INPUTS
clc
L = 3000;
D = 10;
d = 7.2;
fprintf('\nThe Load Applied in kgf is L=%d',L)
fprintf('\nThe Diameter of the Indented Load in mm is D=%d',D)
fprintf('\nThe Diameter of the Indent in mm is L=%d',d)

%% CODE
%Calculating the hardness using the formula
HB=L/((pi*D/2)*(D-sqrt(D^2-d^2)));

%% DISPLAYING OUPUTS
fprintf('\nThe Hardness of the Material is HB=%d',HB)