bernd wrote: ↑
Fri Nov 02, 2018 4:21 pm
We had a disscussion about calculation of an enplate of steel beam cantilever which ist with bolts at work. The beam on the plate is a is a IPE 200. The plat itself is 30 mm thick. I just said let's do it with volume elements and nonlinear in FreeCAD.
The yield point is 235 N/mm2, max sigma should be 223 N/mm2 according national standard, but it is impossible. If the steel starts to yield by 235 the max sigma is above 235. The picture shows any sigma above 240 N/mm2
How about the fixes. Is the fix wron and it should be on top of the plate for the tension bolt hole and on bottom of the plate for the pressure bolt hole.
Bernd, the Von Mises stress should not be above the values defined in the non-linear material object. But as I demonstrated in my knee joint analysis (https://forum.freecadweb.org/viewtopic.php?f=24&t=27431
, the nodal values output to FRD are extrapolated from Gauss points and are not necessarily in line with the input values. You can only really rely on the Gauss point values in the DAT file. They will be perfectly in line with the values entered in the non-linear material object.