Hi everyone,
I converted an Abaqus .odb file to .frd and noticed that some stress values changed slightly after conversion.
For example, at the same location:
The attached image shows a comparison.
Is this expected? Does the conversion process perform any extrapolation, averaging, interpolation, or precision reduction that could cause these differences?
Any insight would be appreciated. Thanks!
Did you use the built-in converter ? It uses position=ELEMENT_NODAL so the stresses are taken as values extrapolated from integration points (where Abaqus originally calculates them). The .frd files can only output averaged nodal stresses.
When using the contour maps, you may also need to take into account e.g. the default 75% averaging threshold in Abaqus.
Yes, I use the built-in converter and thank you for the explanation. That makes so much sense now.
Sure, Iām glad I could help. Btw. there are also converters from .odb to .vtk if you are interested. They might be more versatile.
I am not familiar with .vtk format. Is it possible to postprocess the result from the .vtk file using python?
The .vtk format is used by ParaView. It has many useful postprocessing filters, and Python scripting is also possible. Their forum is here if you want to know the details: https://discourse.paraview.org/
Yes, you can use PyVista.
