Learning Forum

[kubatycjan]

Hi,

I keep getting this error about my problem essentially being too complex for the student software to allow it to be solved. I am working on FEM analysis of self-made car jack. At first, I created body parts in Autodesk Inventor Professional 2025 then I assembled them in Spaceclaim. Later on this message showed up; "Your product license has numerical problem size limits, you have exceeded these problem size limits and the solver cannot proceed." 
I tried using body sizing in Mesh and Mesh Numbering but it didn't work. 

Does anybody know how to fix it ? Cause I need it to write my Engineering Thesis

[Rob]

You either need to reduce the cell count to fit within the bounds of the free software, or use one of the Campus Research level licences. Mechanical has a limit of 128k elements,  https://www.ansys.com/academic/students/ansys-student   

[kubatycjan]

 

Alright thank you, but do You know how to reduce the cell count as you mentionned ? 

 

[Rob]

You need to reduce the mesh resolution - ie make the minimum cell size larger. You may also need to remove some of the fine details too. 

[peteroznewman]

There are eight flat links in the model. If you open this mechanism in SpaceClaim or Discovery, you can extract a midsurface from each of those eight links and in Mechanical, they would mesh with shell elements which would greatly reduce the node count in your model.