you need to generate an unstructured grid, not a polydata. There is no information about connectivity, i.e. connection between 3D elements (tetrahedrons, hexahedrons, ...) and nodes, in the polydata structure. The shape is represented only by facets and it can not simply be converted to FE elements. The solution that comes to my mind is that you export the surface of your geometry to STL format and than you use gmsh  (or some other mesher) to produce the FE mesh.
On 09. 12. 19 12:10, firstname.lastname@example.org wrote:
I'm building a Python/Jupyter application that generates highly complex three-dimensional shapes which I want to evaluate in Sfepy. They are closed meshes and available in various CAD formats and as (t)vtk objects.
When I'm trying to simulate linear elasticity based on the Sfepy interactive example I get an error at the creation of the FEDomain (code: domain = FEDomain('domain', myMesh)
AttributeError: 'vtkCommonDataModelPython.vtkPolyData' object has no attribute 'coors'
I cannot seem to find out how to convert (or 'enrich') my tvkt/vtk PolyData in such a way that it can serve as an FEM Mesh.
I've tried the Mesh.from_data(mesh, coors, ngroups, conns, mat_ids, descs) function, but cannot figure out what to do with the arguments aside from mesh...
Help would be greatly appreciated.
Thanks, best -christian _______________________________________________ SfePy mailing list -- email@example.com To unsubscribe send an email to firstname.lastname@example.org https://mail.python.org/mailman3/lists/sfepy.python.org/