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{color:#ff0000}{*}Problem Specification{*}{color}
[Step 1: Find Reactions R{~}A~, R{~}B~|MATLAB Intro 1 Find Reactions]
[Step 2: Calculate _σ{_}{_}{~}x{~}_ for _r{_}{_}{~}i{~}_ = 1 cm|MATLAB Intro 2 Calculations]
[Step 3: Plot _σ{_}{_}{~}x{~}_ vs. _r{_}{_}{~}i{~}_|MATLAB Intro 3 First plot]
[Step 4: Plot _σ{_}{_}{~}x{~}_ vs. _r{_}{_}{~}i{~}_: Take 2| MATLAB Intro 4 Second plot]
[Step 5: Plot _σ{_}{_}{~}x{~}_ vs. _r{_}{_}{~}i{~}_, Take 3: File Input/Output|MATLAB Intro 5 Third plot] 
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h2. Problem Specification

Consider the beam shown in the figure below. Using MATLAB,

a) Find the reactions R{~}A~, R{~}B~
b) Find the bending stress σ{~}x~ at point O
c) Plot the variation of σ{~}x~ at point O as the inner radius of the tube is varied in the range 0.5 cm < r{~}i~ < 1.5 cm

!beam_figure.jpg!

This tutorial uses MATLAB version 7.1.

h4. Solution Steps

The MATLAB solution is divided into the following steps:
* Step 1: Find Reactions R{~}A~, R{~}B~
* Step 2: Find σ{~}x~ for r{~}i~ = 1 cm
* Step 3: Plot σ{~}x~ vs. r{~}i~
* Step 4: Plot σ{~}x~ vs. r{~}i~: Take 2
* Step 5: Plot σ{~}x~ vs. r{~}i~: Take 3

h4. Conventions Used

In this tutorial, items and options appearing within the MATLAB graphical user interface are denoted in {color:purple}{*}{_}purple, italic, and bold{_}{*}{color}.

Text and numbers that need to be entered are indicated in {{monospace font}}.

Let's dive into [step 1|MATLAB Intro 1 Find Reactions] without further ado.

[Go to Step 1: Find Reactions R{~}A~, R{~}B~|MATLAB Intro 1 Find Reactions]

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