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{include: ANSYS WB - Plate With a Hole Demo - Panel}

h1. Plate With a Hole Tutorial - Pre-Analysis and Start-Up

h3. Pre-Analysis Calculations 

First, let's solve for the maximum normal stress in the plate. To find the maximum stress, we need to find the stress concentration factor. It can be found using the chart below taken from Beer, DeWolf, and Johnston's Mechanics of Materials

!Stress concentration.png!

Using the dimensions from the problem specification, we find that {latex} $\frac{r}{d} = \frac{.25}{5-.5}= .0556$ {latex} Using the chart, we can estimate {latex} $K \approx 2.8 $ {latex}. The maximum stress can be found using the formula

{latex}
$\sigma_{max} = K*\sigma_{avg} $
{latex}

where K is the concentration factor, and

{latex} 
$\sigma_{avg} = \frac{F}{A_{minimum}} = \frac{F}{t*w} = \frac{100000}{.1 * (5-.5)} = 2.22*10^{5} $ psi
{latex}


sdfuighh3. ANSYS Simulation

Now, let's load the problem into ANSYS and see how a computer simulation will compare. First, start by downloading the file here

The zip should contain a class demo1 folder with the following contents:
- class demo 1_files folder
- class demo 1.wbpj
Please make sure both these are in the folder, the program would not work otherwise. (Note: The solution was created using ANSYS workbench 12.1 release, there may be compatibility issues when attempting to open with other versions). Be sure to extract before use.