FEM MeshNetgenFromShape
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|
|
| 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
- 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 button, or - select the Mesh →
FEM mesh from shape by Netgen option from the menu.
- Press the
- Optionally, edit the parameters.
- 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;
FEM
- Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor
- Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)
Constraints
- Electromagnetic: Electrostatic potential, Current density, Magnetization
- Geometrical: Plane rotation, Section print, Transform
- Mechanical: Fixed, Displacement, Contact, Tie, Spring, Force, Pressure, Centrif, Self weight
- Thermal: Initial temperature, Heat flux, Temperature, Body heat source
- Overwrite Constants: Constant vacuum permittivity
- Solve: CalculiX Standard, Elmer, Mystran, Z88; Equations: Deformation, Elasticity, Electrostatic, Electricforce, Magnetodynamic, Magnetodynamic 2D, Flow, Flux, Heat; Solver: Solver control, Solver run
- Results: Purge, Show; Postprocessing: Apply changes, Pipeline from result, Warp filter, Scalar clip filter, Function cut filter, Region clip filter, Contours filter, Line clip filter, Stress linearization plot, Data at point clip filter, Filter function plane, Filter function sphere, Filter function cylinder, Filter function box
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
User documentation
- Getting started
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