Hello @dheiny and @ahmedhussain18 and SimScale Staff!
I have an issue when getting the nodal forces in ParaView. I select a contact pair with the “extract block” filter (slave and master separeted one by one) and I select the points using the “Select Points Through”, after it I choose the “SpreadSheet View” and the “Show only Selected Elements” option. Then I save the table with the “Export Scene” button and from excel I extract and summarize the nodal forces in Y direction (this direction is interesting). But I see different force sum values at the master and at the slave side. Further on, the stress what I see in the homogeneous stress distribution zone is OK, exactly the value what I expect! But this stress can not be reproduced when I whant to calculate it back analytically from the reaction forces. Both of the reaction force sums (master and slave) should result in much smaller stress in the bolt (keep in minde, that I get different values at the master and slave side).
The model is quarter model of a pretensioned bolt and of a compressed pipe (see: https://www.simscale.com/workbench?publiclink=0d23fb61-8084-4a62-b502-cfceb46fcd66 the 1stelAugmLag-model and its results). I checked the master and the slave contact surfaces below the bolt head. The stresses are fine, but the force summation is not ok somehow, I think they have to be fine too in the model, othervise the stress wouldn’t be what I expect (I mentioned it abowe).
NOTE: I considered that I have a quarter model when calculationg back the stresses from the reaction forces, so I think this is not the problem…
below you can see a few pictures of the pretensioned bolt and pipe (deformation scale is 100x)
and the von Mises stress distribution:
Your help is highly appreciated!