bernd wrote: ↑
Wed Apr 17, 2019 8:27 pm
I must admit, Surely this has some points too. For the geometry I have I never did this, but my geometry usually does not have geometrical errors and is rather simple for our meshers.
We might should the user let decide ... and put them all 3 as Jee-Bee had it on the same step.
I purposefully put the mesh in its own block because it uses an external application. This makes it evident that an external piece of software is being used. Obviously in FreeCAD you can quickly define the geometry, the analysis, and then mesh inside FreeCAD; this is simple to do for simple geometry, and if you don't mind having only triangles and tetrahedra. But for complex geometrical elements, I wonder, do people really mesh inside FreeCAD? I would expect an experienced user to mesh the geometry with an external program to really control all details and produce an all-quad all-hexahedra mesh. I think this is what -alex- is referring to.
In traditional FEA, the mesh is one of the critical steps. But again, it depends on your own usage. It's not the same doing crash simulations, and doing structural simulation. Small deformation cases, like structural analyses, work well with triangular meshes, but large deformation time-dependent simulations do not.