Calculix and the FreeCAD FEM workbench integration worked great. The ability to split complex bodies can help create boundaries, define materials or mesh in more detail as commercial software like Ansys with Spaceclaim or Designmodeler allow. As demonstrated bellow it is possible to have multiple bodies split as if only one part exists. I tested the generated and specifically placed a boundary connection displacement between the two bodies.
#Gmsh meshinh multiple objects generator
After this you will have a connected grid and can check by seeing if the mesh of the two bodies are coincident on the touching zones. 1D, 2D, 3D Meshing using GmshGmsh is a is a three-dimensional finite element mesh generator developed by Christophe Geuzainevisit the website. GmshModel is intended to be an extendable. Luckily, Gmsh provides a Python-API with which all the capabilites of Gmsh can be used within Python. occ.synchronize()() Profile points added to gmsh. To have then connected additional in the Part workbench you will need to select the “Fuse Objects” button. Gmsh is a powerful tool for the generation of meshes for numerical simulations but the built-in scripting language makes the meshing procedure and especially an automatization really hard. We can check that the points are reasonable by using to open the GUI after updatingthe objects. If you create a mesh at this stage the grid between the two bodies won’t be connected. The key to bind different bodies is to use in the part workbench “Make a compound of several shapes” button. Each sketch was extruded by the Extrude button in the Part Workbench. I used the Part workbench and the sketch workbench to create the geometries. There are many ways to create the two volumes from here. The top cube was bigger than the bottom cube. To start I created as a geometry two cubes staked on top of each other. Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. The solver was Calculix and meshing with Gmsh. What I will not be approaching in this article is contacts between multiple seperate bodies.įor this article I used FreeCAD with the FEM workbench (Calculix and Gmsh).
In this article I will share the configuration that worked for me to be able to split the geometry in multiple bodies that can have different materials and boundaries but have all a common single grid.
#Gmsh meshinh multiple objects how to
Here I got into some problems with FreeCAD to understand how to make it work. Some times we need to create two objects separately but in the end fuse them together to make the final FEM mesh, or imagine that you need to place boundaries on very specific places on your solid that require some kind of section.
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