Merging faces

Use the Merge Face command to merge two separate polygon faces into a single polygon face along a common polygon edge.

You can use Merge Face to combine adjacent polygon faces into a single face. This is useful, for example, if you want to create larger faces prior to meshing. You can also use Merge Face to recombine faces you previously divided with the Split Face command.

Use the Type option in the Merge Face dialog box to specify whether you want to manually or automatically merge faces.

• Select Edge Based to manually merge faces by specifying the edges to remove.

• Select Face/Body Based to have the software automatically merge faces within a selected set of faces or within a selected body based on criteria that you specify.

Merging faces manually by selecting edges

With the Edge Based option, you can merge adjacent faces by manually selecting the edges to remove. In the example, (1) shows a set of polygon faces and the selected edge to remove. (2) shows how the software merges the adjacent faces when it removes the edge.

Merging faces automatically by specifying criteria

With the Face/Body Based option, you select either the set of faces or a polygon body that contains the faces that you want the software to evaluate. You can then specify the Vertex Angle and Edge Angle options that the software uses to evaluate whether to merge adjacent faces.

• The Vertex Angle is the angle between two separate edges that are joined at a vertex along the boundary of a face.Vertex angle for automatically merging faces

• The Edge Angle is the angle between two faces joined at an edge.Edge angle for automatically merging faces

In general, you should use fairly conservative values for both the Vertex Angle and Edge Angle options. If you have the software merge surfaces that are joined at larger angles, you may create faces with such high degrees of curvature that the software cannot mesh them.

In the example, (1) shows the set of polygon faces. (2) shows the same set after the software merged faces that had a Vertex Angle value less than 5° and an Edge Angle value less than 10°.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM file as the displayed part and work part
Command Finder	Merge Face

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Related Topics

Generating surface wrap bodies and meshes

Merging faces, Simcenter 3D 2021.1 Series

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