Creating Your First Model in FEBio Studio

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Creating Your First Model in FEBio Studio

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Step 1: Creating a New Project

  1. Open FEBio Studio on your machine.
  2. A Project Manager window will appear. Choose “Structural Mechanics”, and click OK.
  3. Save your project by selecting File -> Save, clicking on the save icon in the upper left corner, or by pressing Ctrl + S.

Step 2: Creating the Model Geometry

  1. Locate the Build panel. By default it is found on the right side of the window. Click on the Create tab.
  2. Click on the Box button in the Create tab.
  3. Under Parameters set the following: Width = 4, Height = 1, Depth = 1.
  4. Click the Create button to create the box.
  5. You should now see the box in the model view area.

Step 3: Adding a Mesh to the Model

  1. Click on the Mesh tab in the Build panel. If there are no available options on the Mesh tab, then ensure that the box is selected by clicking it in the model view area.
  2. Set the following parameters: Nx = 20, Ny =5, Nz = 5. Leave all other parameters set to their default parameters. Click Apply.
  3. In order to view the mesh, turn the mesh lines on by pressing M or by clicking on the mesh icon in the top toolbar.
  4. You should now be able to see the box’s mesh.

Step 4: Creating a Material

  1. Open the dialog for creating materials by selecting Physics -> Add Material from the menu, by right clicking on Materials in the Model panel on the left side of the window, and then selecting Add Material, by pressing Ctrl + M, or by clicking on the Add Material icon in the toolbar .
  2. From the Category dropdown menu choose uncoupled elastic, and select Mooney-Rivlin from the Material dropdown menu. Click OK.
  3. In the Model panel, ensure that Material 1 [Mooney-Rivlin] is selected under Materials.
  4. Under the Properties section, set the following: density = 1, c1 = 1, c2 = 0, bulk modulus = 100
  5. Apply this material to the box by clicking on the box in the model view, and then clicking the green plus icon under the Selection section.
  6. The box should have changed color to indicate that the material has been applied.

Step 5: Assigning Boundary Conditions

This tutorial requires only two simple boundary conditions. The left side of the box will be constrained from moving. A prescribed displacement will be applied to the right side of the box.

  1. Add a boundary condition by selecting Physics -> Add Boundary Condition from the menu, by right clicking on Boundary Conditions in the Model panel on the left side of the window, and then selecting Add Boundary Condition, or by pressing Ctrl + B.
  2. Select Fixed displacement from the list, give the boundary a descriptive name, such as “Fixed Left”, and click OK.
  3. Under the Properties section in the Model panel, check all three boxes (X-displacement, Y-displacement, and Z-displacement). This ensures that objects or surfaces to which this boundary condition are applied will be unable to move in any direction.
  4. In order to select a single surface, click on the blue square located in the top toolbar . Click on the surface located on the left (or negative x) side of the box. If you cannot see that side of the box, rotate the view by clicking and dragging anywhere in the model view area. When properly selected, the surface should be highlighted in blue.
  5. Ensure that your boundary condition is selected by clicking on it under Boundary Conditions in the Model panel. Add the selected surface to the boundary condition by pressing the green plus icon under the Selection section in the Model panel. If done correctly a new surface should be added to the list next to the green plus icon.
  6. Deselect the currently selected surface by clicking on the background of the model view area, or by pressing the Esc key. It is important to deselect the left surface because when a new boundary is created, it will automatically be applied to any selected surfaces.
  7. Add another boundary condition. Select Fixed displacement from the list, give the boundary a descriptive name, such as “Fixed Right”, and click OK.
  8. Under the Properties section in the Model panel, check Y-displacement, and, Z-displacement.
  9. Add the surface located on the right (or positive x) side of the box to this boundary condition. This will prevent the right side of the box from moving in the y and z directions.
  10. Add another boundary condition. Select Prescribed displacement from the list, give the boundary a descriptive name, such as “Prescribed”, and click OK.
  11. Under the Properties section in the Model panel, select X-displacement, and assign a value of 1 to scale.
  12. Again, add the surface located on the right (or positive x) side of the box top this boundary condition. This will cause the right side of the box to move a distance of 1 in the x direction.

Step 6: Adding an Analysis Step

Finally, we need to create an analysis step to define what type of analysis we want to do.

  1. Add an analysis step by selecting Physics -> Add Analysis Step from the menu, or by right clicking on Steps in the Model panel on the left side of the window, and then selecting Add Analysis Step.
  2. Select Structural Mechanics from the list and click OK.
  3. Properties for the analysis step should now be visible under the Properties section in the Model panel. For this analysis leave all settings as they are.

The PreView model file is now complete. To learn how to run the file in an FEBio analysis, proceed to the next tutorial.

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