Create a new FEM file

You can create a FEM file by itself, without creating a corresponding Simulation file. When you do so:

• You have more control over how FEM files are named.

• You can associate multiple FEM files with a given master part or idealized part.

To create a FEM file:

1. Do one of the following:If no part file is open, choose Home tab→New .If a part file is open, choose Home tab→Context group→New FEM .

2. In the Simulation tab, select a FEM template.

3. In the New File Name group, type a unique file name in the Name box.Note: You must type a unique name for the file. You cannot create a FEM with the same name as the corresponding part file, for example.

4. (Optional) Click Open next to the Folder box and select the folder for the FEM file.

5. Click OK.The New FEM dialog box appears.

6. (Optional) To create a FEM that is not associated with a master part (for example, if you plan to import FE data from another program), clear the Associate to Master Part check box and proceed to step 10.

7. (Optional) To create a FEM that is associated directly to a master part (that is, if you are not performing any geometry idealization), clear the Create Idealized Part check box.FEM files are typically associated with an idealized part. The idealized part is an assembly instance of the master part. All geometry idealization is performed on the idealized part.

8. If your part contains multiple solid or sheet bodies, from the Bodies to Use list, specify which bodies to include in the FEM file:All Visible—Include all the currently visible solid or sheet bodies from the master part.Bodes that are not currently visible are not included.Note: The software does not remove a body from a FEM file if you later hide the body. If you later display additional bodies, the software automatically adds those to the FEM file.All—Include all solid or sheet bodies from the master part.Any new bodies that you create with idealized part commands (such as Midsurface or Partition) are automatically added to the FEM file.Note: Because lightweight facet bodies contain no polygon edge or face data, you cannot create a FEM on lightweight facet representations in assembly reference sets. If you select All, the software skips any lightweight facet bodies in the assembly part.Select—Include only the solid or sheet bodies that you select.When you select this option, Type Filter and Selection Scope become active in the Top Border bar, and you can select solid or sheet bodies in the graphics window. However, you cannot select facet bodies.Any new bodies that you create with idealized part commands are not automatically added to the FEM file. You must manually edit the FEM file to add any additional bodies.None—Creates a FEM file that include no bodies from the master part.Note: These options have no effect on the idealized part file. That file always contains all the bodies from the master part.

9. (Optional) To include CAD reference geometry (such as points, curves, or coordinate systems), click Geometry Options and select the geometry to include.

10. From the Solver list, select the solver that you want to use.

11. From the Analysis Type list, select the type of analysis that you want to perform.Note: Choosing the solver and analysis type are critical steps. The solver and analysis type you choose determines the type of solutions you can create, and the types of elements and boundary conditions you can include in your model.

12. (Optional) If the 2D Solid Option list appears and you want to include axisymmetric, plane strain, or plane stress elements, select the appropriate plane for the 2D solid elements, as well as the axis of rotation.

13. (Optional) Create a global cyclic analysis coordinate system to define a default axis of rotation.Note: You can create a global cyclic analysis coordinate system in both of the following cases:When 2D Plane is set to None. Your FEM template may have the global cyclic analysis coordinate system predefined. When 2D Solid Option is set to a specific plane and axis of rotation.

14. (Optional) In the Description group, type a description of the model.

15. Click OK.The new FEM appears in the graphics window.The Simulation Navigator displays the new FEM file, the idealized part file (if applicable), and the master part. It also lists all polygon bodies and, depending on your geometry options, coordinate systems. mypart_fem1.fem mypart_fem1_i.prt mypart.prt Polygon Geometry Polygon Body_1 CSYS 1 – csys Groups Fields

How do I

Create a new Simulation file

Create new FEM and Simulation files

Create an assembly FEM file

Create a new idealized part file

Learn more

Including CAD points in a FEM file

Look up more details

Automatic stitching of NX Ship Design parts during FEM creation

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Create a new FEM file, Simcenter 3D 2021.1 Series

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