FEA Error - "Regularization Failed"

[Anonymous]

Doing a static load analysis - nothing fancy here. Getting a "Internal Error: Regularization Failed" error.

Happens when I do Automatic Contacts or try to run the simulation.

What the heck does that mean & how is it fixed?

Thanks to anyone who can help here.

[Anonymous]

Doing a static load analysis - nothing fancy here. Getting a "Internal Error: Regularization Failed" error.

Happens when I do Automatic Contacts or try to run the simulation.

What the heck does that mean & how is it fixed?

Thanks to anyone who can help here.

[jalger]

Hi Marshallw,

I Have seen this before with Thin Bodies, Try Running the "Thin Bodies" Command to identify any parts that MIGHT be considered Thin.

I Think its a problem with the Mesh, you could also try change the local Mesh settings on the member that might be considered thin.

The only Other time I have seen something like this was with a "home made" Material and someone forgot to add the Physical Properties.

Not sure if either of those help, but those are the only two times I have seen a "Regularization error".

Regards,

James

[jalger]

Hi Marshallw,

I Have seen this before with Thin Bodies, Try Running the "Thin Bodies" Command to identify any parts that MIGHT be considered Thin.

I Think its a problem with the Mesh, you could also try change the local Mesh settings on the member that might be considered thin.

The only Other time I have seen something like this was with a "home made" Material and someone forgot to add the Physical Properties.

Not sure if either of those help, but those are the only two times I have seen a "Regularization error".

Regards,

James

[Anonymous]

Might be the mesh -- I'll give that a try -- don't think there are any exotic materials in the assembly.

Thanks

[Anonymous]

Might be the mesh -- I'll give that a try -- don't think there are any exotic materials in the assembly.

Thanks

[raviburla]

Hi,

The error message indicates that there is some issue in the geometric pre-processing. This step happens before contact detection. The problem could be dataset specific. If you can send the model, we can take a look.  

Please also see the discussion here:  http://forums.autodesk.com/t5/Inventor-General-Discussion/Meshing-error/m-p/5188005#M517097

Thanks,

Ravi Burla (Autodesk)

[raviburla]

Hi,

The error message indicates that there is some issue in the geometric pre-processing. This step happens before contact detection. The problem could be dataset specific. If you can send the model, we can take a look.  

Please also see the discussion here:  http://forums.autodesk.com/t5/Inventor-General-Discussion/Meshing-error/m-p/5188005#M517097

Thanks,

Ravi Burla (Autodesk)

[Anonymous]

Just a point to this, I was getting the same error, even though I had excluded 90% of the assembly parts to drill down to only the important parts.  When I performed a pack & go (still got the error on the pack & go assembly initially) I then physically deleted the parts that I had excluded previously and the simulation ran fine.  This suggests that simply excluding a part from the simulation isn't as complete as it apears.

[Anonymous]

Just a point to this, I was getting the same error, even though I had excluded 90% of the assembly parts to drill down to only the important parts.  When I performed a pack & go (still got the error on the pack & go assembly initially) I then physically deleted the parts that I had excluded previously and the simulation ran fine.  This suggests that simply excluding a part from the simulation isn't as complete as it apears.

[hej.simon]

I can confirm this. I had a sheet metal weldment where I got "Regularization Failed" when building the mesh. I tried to change the mesh settings but could not make it work. It was only when i completely deleted some already excluded bearings that the error was gone. Its obvious that excluded components still are playing around with the meshing.

I'm running Inventor 2020.

[hej.simon]

I can confirm this. I had a sheet metal weldment where I got "Regularization Failed" when building the mesh. I tried to change the mesh settings but could not make it work. It was only when i completely deleted some already excluded bearings that the error was gone. Its obvious that excluded components still are playing around with the meshing.

I'm running Inventor 2020.

[jalger]

Well no need to delete them, you just need to change your workflow. 

Make a Level of Detail and make sure that is active, before you start the solver.

Parts that are already suppressed in the assembly will not show up in the Solver ( built-in and Nastran).

It will bring in only unsuppressed parts, then you can generate the mesh. ( along with the rest of the setup- but the mesh was the issue here)

This way you don't need to delete parts from the assembly to run the solver.

That said its always a good idea to have a Solve copy (FEA Copy) vs a working copy (Design / Production Copy), mostly for vault as those solves can get rather large. Trust me you don't need or want the 200Mb files attached in vault. 

[jalger]

Well no need to delete them, you just need to change your workflow. 

Make a Level of Detail and make sure that is active, before you start the solver.

Parts that are already suppressed in the assembly will not show up in the Solver ( built-in and Nastran).

It will bring in only unsuppressed parts, then you can generate the mesh. ( along with the rest of the setup- but the mesh was the issue here)

This way you don't need to delete parts from the assembly to run the solver.

That said its always a good idea to have a Solve copy (FEA Copy) vs a working copy (Design / Production Copy), mostly for vault as those solves can get rather large. Trust me you don't need or want the 200Mb files attached in vault.