Negative coordinate values error in 2D axisymmetric analysis

[Yunus9696]

Dear colleagues
Hope you're fine.

I'm trying to model a threaded connection with a 2D axisymmetric model.I need to make several models with slight changes and differences.
When submitting some models for analysis they get aborted due to
some nodes have Negative coordinate values error.
When I check the error node set, they are all placed on the axis of symmetry.
I tried several ideas to work this out but none of them was successful like
[ul]
[li]changing element type,[/li]
[li]constraining the part in the direction prependicular to the axis of symmetry[/li]
[li]Using another datumn coordinate system[/li]
[/ul]

Thanks for your help.

PS: some other models get solved without this error while these models are copied from one another and I couldn't see any difference seem to be related to this error between them

 

[FEA way]

Check the coordinates of those nodes. You can even try adjusting them manually (Edit Mesh --> Node --> Edit --> Coordinates). But it can be a fault of the inaccuracy of the geometry.

 

[Yunus9696]

Thanks dear FEA way for your kind attention.
I'll check the mentioned instruction and share the results for future reference.