You can import a DXF-file into XFEM4U.
DWG is currently not supported natively. You can convert your DXF to DWG using AutoCAD or this free online tool
There are 2 options for DXF-import:
- Import DXF underlay: imports the DXF in your model as an underlay.
- DXF-import: converts the lines from the DXF to beams in XFEM4U.
Check also this post and video on LinkedIn
Under Display options > General > Show DXF underlay you can toggle the visibility of the DXF underlay.