Geometry Cleanup

Tutorial Level: Beginner In this tutorial, you will learn how to cleanup geometry and conduct midsurfacing.

Before you begin, copy the file(s) used in this tutorial to your working directory.
In this tutorial you will:
  • Evaluate the integrity of a model
  • Use the Surface repair to find, review, and fix any geometric errors in the model surfaces
  • Identify issues
  • Remove free edges
  • Create closed shell

Evaluate Model Integrity

In this step, you will evaluate the model integrity using the View Controls toolbar.

  1. Start HyperMesh.
  2. From the menu bar, click File > Open > HyperMesh Model.
  3. Browse to your working directory, select Surface-Repair.hm, and click Open.
    The model opens in the modeling window.
  4. From the View Controls toolbar, click and select Topology.
  5. Zoom, pan, and rotate the model to evaluate the model integrity.
    Figure 1.


Find, Review, and Fix Geometric Errors

In this step, you will use the Surface Repair tool to find, review, and fix any geometric errors in the models surface.

  1. From the 2D ribbon, select the Surface Repair > Validate tool.
    Figure 2.


  2. From the guide bar, click to define which errors to check for.
    1. In the Free edges section, select the Optimize surface quality check box.
    2. In the Slivers section, enter 0.20 for Size<.
    Figure 3.


  3. In the modeling window, select all surfaces.
  4. From the guide bar, click Find.
  5. In the modeling window, review the legend.
    Figure 4.


Identify Issues

From the guide bar of the Validate tool, click to automatically fix the issues based on the selected checks, methods, and tolerances.
The legend updates and describes the types of errors still contained in the model.
To review and fix specific error types, you can do one of the following:
  • Select the associated tool from the secondary toolset.
  • From the legend, click the error type.

Remove Free Edges

  1. From the 2D ribbon, select the Surface Repair > Edges tool.
    Figure 5.


  2. Use the arrows on the guide bar to navigate between issues.
    Figure 6.


    Figure 7.


  3. Optional: While in navigation mode, right-click in the modeling window and select or deselect adjacent surfaces from the context menu.
  4. From the microdialog, click .
  5. In the modeling window, select each edge to be patched.
    Figure 8.


  6. From the microdialog, click Fix.

Create Closed Shell

  1. From the 2D ribbon, select the Surface Repair > Closed Shells tool.
    Figure 9.


    Note: You can also open the Closed Shells tool by selecting Closed Shells from the legend.
    Figure 10.


  2. From the guide bar, click to convert bonding surfaces to a solid.
  3. Exit the Closed Shells tool and verify proper creation of the solid.
    Figure 11.


Tip: If the Surface Repair tools can not fix any error checks, isolate the error checks and fix them using the Edit Geometry tools.