FEM FemMesh2Mesh

Erase Elements

Solver CalculiX Standard

FEM

FEM FemMesh2Mesh
Menu location
Mesh → FEM mesh to mesh
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial

Description

This tool converts surfaces of 3D elements or whole 2D elements of a selected FEM mesh to surface mesh. Internally, it picks FEM mesh element faces that are unique (not shared by two elements) and uses them to create faces of a surface mesh. Optionally, it can be used to save a deformed mesh. This is done by adding the displacement of the FEM results to the mesh nodes (the scale of the displacement can be set using Python).

introduced in version 1.0: The tool also creates a Mesh2Fem object which is a triangular FEM mesh generated from the surface mesh.

Usage

1. Select a FEM mesh object.
2. Optionally also select the FEM results.
3. There are several ways to invoke the command:
   • Press the FEM mesh to mesh button.
   • Select the Mesh → FEM mesh to mesh option from the menu.

Scripting

Note: The parameter scale was introduced in version 0.21. For older versions of FreeCAD omit it from your code.

The cantilever example in FreeCAD version 1.0:

from os.path import join
import FreeCAD as App
import Mesh
from femmesh import femmesh2mesh

path = join(App.getResourceDir(), "examples", "FEMExample.FCStd")
doc = App.openDocument(path)
fem_mesh = doc.FEMMeshGmsh.FemMesh
result = doc.CCX_Results
scale = 10  # displacement scale factor
out_mesh = femmesh2mesh.femmesh_2_mesh(fem_mesh, result, scale)
Mesh.show(Mesh.Mesh(out_mesh))

Erase Elements

Solver CalculiX Standard

FEM

FEM

• FEM Analysis

• Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor

• Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)

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Constraints

• Electromagnetic: Electrostatic potential, Current density, Magnetization

• Fluid: Initial flow velocity, Initial pressure, Flow velocity

• 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

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• Mesh: Mesh Netgen, Mesh GMSH, Mesh boundary layer, Mesh region, Mesh group, Nodes set, Mesh to mesh

• 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

• Utilities: Clipping plane, Remove clipping planes, Open FEM examples; Mesh clear, Mesh display info

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• Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types

User documentation

• Getting started
• Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
• Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate

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• Help: Tutorials, Video tutorials
• Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework

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• Addons: Addon Manager, External workbenches, Scripting and macros

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• Hubs: User hub, Power users hub, Developer hub