Reply To: Force/Moment Reactions at Contact (Weld Seam Evaluation: nominal stress concept)

[dlooman]

Yes, unfortunately the postprocessing commands aren't written to the ds.dat file.  Only the preprocessing and solution commands.  I'm quite sure Mechanical is doing something like spoint/fsum.  The centroid is probably computed based on the average node location.  You could double check it with a commands object using APDL commands, but I doubt it would differ very much.  You're assuming the stress varies linearly through the top flange thickness and the section.  Is it possible that assumption is introducing a discrepancy?