I have no idea why, but lately I'm having the warning message below quite often.
The following Boundary Conditions are applied to geometry having partial association of nodes and elements.
This may lead to unexpected solution results.
Some times with Contacts.
My whole simulation is composed of CHEXA(20) and CETRA(10) elements.
I'm using NX10. I never had this warning messages in previous versions.
The message is indicating that portions of the geometry that the boundary condition is applied to has no related nodes/elements. For example, say you 2D mesh a face, then delete the elements that are connected to a vertex of the face. This message is highlighting that the vertex has no related node. So, there is partial mesh associativity in terms of the edges that are connected to the vertex that no longer has a node.
Did you do any manual mesh operations that deleted nodes/elements? Did you merge coincident nodes? If so, you may have created partial mesh association with respect to the geometry. The mesh morphing commands include options to show partially associated elements, associated nodes, and orphan nodes. Orphan nodes are those that are associated to no geometry. It also can show geometry that has no associated nodes. Lastly, on the FEM in the Simulation Navigator, there is an MB3 command called Report Association. These tools should help you identify where your model has partial geometry/mesh association.
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Thanks for your answer.
I actually found out the reason for my problem, and I tried to post it, but somehow the server was down.
My problem is that my geometry has overlapping identical volumes and sometimes the boundary condition is applied on the unmeshed volume.
For some reason, I've been having this issue with overlapping identical volumes for the last couple of months... I'll try to find out why.
Do you use WAVE links in the idealized part? WAVE will create an associative copy of assembly components in the work part. For CAE this is typically going to be in the idealized part. If you're not careful in setting up your model, you can end up with a polygon body from the original assembly component and the associative copy from the WAVE link.
I'll assume that WAVE is the culprit. Unless you have a compelling reason for using WAVE, you may want to consider using Promote instead. Promote also creates associative copies of assembly component bodies. It is limited in what it can do, but it manages the copy and parent such that you will never get duplicate polygon bodies. For most CAE work, Promote is sufficient and easier to deal with.
I usually use WAVE because I tend to have problems with boolean operations on Promoted parts. I still need to figure out why.
I noticed that the Hide Original option in the Settings group of the WAVE Geometry Linker is not available on the WAVE button. The whole "Settings" tab is just not there. I'll just have to hide the original parts manually.
I'll run some tests on promoted and wave parts with boolean operations and will let you know as soon as a figure out what the problem is.
Thanks for your help! I'm very satisfied with your answer. You don't need to reply further.
I suspect that my problem is similar to the problem described in PR Number: 6837531
I searched in the GTAC for similar problems (Boolean on promoted volumes)
IR Number: 6372773 - resolved by code
PR Number: 1807965 - resolved by code changes
PR Number - 5712993 - with solution I didn't understand