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Author: Benjamin Mullen, Cornell University

[Problem Specification|ANSYS WB - Bike Crank - Problem Specification]
[1. Pre-Analysis & Start-Up|ANSYS WB - Bike Crank - Pre-Analysis & Start-Up]
[2. Geometry|ANSYS WB - Bike Crank - Geometry]
[3. Mesh|ANSYS WB - Bike Crank - Mesh]
[4. Setup (Physics)|ANSYS WB - Bike Crank - Setup (Physics)]
[5. Solution|ANSYS WB - Bike Crank - Solution]
[6. Results|ANSYS WB - Bike Crank - Results]
[7. Verification & Validation|ANSYS WB - Bike Crank - Verification & Validation]
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h1. Pre-Analysis & Start-up

h3. Hand Calculations

If we assume plane stress, we can treat this problem like a 2-dimensional loading problem. Click [here|^Crank PreAnalysis.pdf] to see the Pre-Analysis for the bike crank. Remember, it is always important to perform some sort of calculation before attempting a simulation; otherwise, you will not be able to judge the validity of your simulation.

h3. Open ANSYS Workbench

Now that we have completed the pre-calculations, we are ready to do a simulation in ANSYS Workbench! Open ANSYS Workbench by going to *Start > ANSYS > Workbench*. This will open the start up screen seen as seen below

!OpenANSYS.png!

To begin, we need to tell ANSYS what kind of simulation we are doing. If you look to the left of the start up window, you will see the Toolbox Window. Take a look through the different selections. The plate with a hole is a static structural simulation. Load the static structural tool box by dragging and dropping it into the Project Schematic. 

!Start Up Screen 2.png!
 
Name the Project "Bike Crank". Now we need to specify what type of material we are working with. Double click {color:#990099}{*}{_}Engineering Data{_}{*}{color} and it will take you to the Engineering Data Menus. 

!Engineering Data.png!

If you look under the "Outline of Schematic A2: Engineering Data" Window, you will see that the default material is Structural Steel. The Problem Specification specifies the material's Modulus of Elasticity and Poisson ratio. To change the material, first right click structural steel under the  click "Outline of Schematic A2: Engineering Data" Window delete it. To add a new material, click in an empty box and give it a name. We will call our material "Al6061T6". On the left hand side of the screen, {color:#990099}{*}{_}Physical Properties > Density{_}{*}{color}. Next, go to {color:#990099}{*}{_}Linear Elastic > Isotropic Elasticity{_}{*}{color} to specify E and {latex}$\nu${latex}. Set the density as {color:#990099}{*}{_}0.0975 lb/in³{_}{*}{color}, the Elastic Modulus as {color:#990099}{*}{_}1E7 psi{_}{*}{color}, and set the Poisson Ratio to {color:#990099}{*}{_}0.33{_}{*}{color}.

Now that the Material has been specified, we are ready to import the geometry into ANSYS.

Continue to [Step 2: Geometry|ANSYS WB - Bike Crank - Geometry]
[Go to all ANSYS Learning Modules|ANSYS Learning Modules]