FEM MeshNetgenFromShape

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FEM MeshNetgenFromShape.svg FEM MeshNetgenFromShape

Menu location
FEM → FEM mesh from shape by Netgen
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

For a finite element analysis the geometry needs to be discretized into a FEM Mesh. This command uses Netgen (which needs to be installed on the system) for calculating the mesh.

Depending on your operating system and your installation package Netgen might be bundled with FreeCAD or not. For further information see FEM Install.

Usage

  1. Select the shape you want to analyze. For volume FEM this needs to be a solid or compsolid. A compsolid is necessary if your part is made from multiple materials. (A compsolid can be created with the BooleanFragments command.)
    • Press the FEM MeshNetgenFromShape.svg FEM MeshNetgenFromShape button, or
    • select the Mesh → FEM MeshGmshFromShape.svg FEM mesh from shape by Netgen option from the menu.
  2. Optionally, edit the parameters.
  3. Click the Apply button to make a mesh, or OK button to make a mesh and close the dialogue.

Properties

  • DataMax. Size: Maximum size of the element in mm.
  • DataSecond order: Second order elements contain more nodes per element. Usually, it is enough to use rougher mesh to obtain same solution precision as with the first order elements,
    • true (default); second order elements,
    • false; first order elements.
  • DataFineness: Defines how fine the mesh should be.
  • DataGrowth Rate: Defines how much adjacent elements can differ in size.
  • DataNb. Segs per Edge: Defines the minimum number of mesh segments per edge.
  • DataNb. Segs per Radius: Defines the minimum number of mesh segments per radius.
  • DataOptimize:
    • true (default); applies optimization algorithm to improve mesh quality,
    • false;