Hi All
I have a strange result for a simple cantilever made of aluminium round tube. This is part of an assembly.
With the beam mesh the result matches manual calculation, with solid mesh the result is far above theoretical value (normal bending stress). I guess this has a simple explanation and solution, however I couldn't find out myself. Similar problem with rectangular cross section gives acceptable values.
I really appreciate if someone takes a look and give me advice.
Regards,
Without opening your part here are my suggestions. Crank up the mesh density. As a rule of thumb you need at least 3 elements through the thickness to account for bending in first order elements even more with tets like cosmos uses. Ignore the values near the constraints for comparison even though they may be real. Beam theory does not account for stress concentrations near boundary conditions. I hope this helps.
Rob Stupplebeen