Constraint pool exhausted- how can this be fixed

[Alexander Koss]

Hello everyone,

I am currently working on a pretty big assembly model. Everything seems to run fine except for when I add the final few components to the assembly. Whenever I try to solve, it gives out the following warning:

***WARNING: EXHAUSTED THE CONTACT CONSTRAINT POOL.

What does this mean? There seem to be no real issues with the part. The simulation works with the part being in it, but not in its place (it's a cap of a part). Whenever I move it to its destined location, the mentioned warning occurs, and the simulation fails after a few increment attempts. How can this be fixed?

 

[FEA way]

Are there any other warnings and errors in dat and msg files ? Which type of contact do you use ?

 

[Alexander Koss]

Afterwards there are some max. penetration errors happening. This is the first warning message. I am guessing the penetration errors occur due to something being wrong initially with the contact, since I checked the exact node where the error is supposed to be, and it seemed perfectly fine, no overlaps in sight.

 

[FEA way]

Do you use general contact or contact pairs ? Can you attach some pictures ?

 

[Alexander Koss]

Currently, there is just general contact between those two faces. Sadly, I am not able to attach any Photographs of the model due to privacy reasons. It's a curved shell geometry, which lies on top of another shell. The thing that makes me question the cause of the error is the fact, that when I move this particular shell away from the model (fixed with BCs), basically detaching it from the rest of the assembly, it runs. When I change its location to where it's supposed to be, the simulation gives out those error messages.

 

[FEA way]

Try defining contact pair for this part. It will be automatically excluded from GC domain.

 

[Alexander Koss]

I'll try that out, thank you!