Hi all, I have had a go at learning calculix. I can see it is a great tool but not being an engineer it is over my head. I have a simple test case and I wonder if anyone would mind looking at the issue and perhaps modelling it. You can read a description at https://polesnwires.com/downloads/ValidUseOfMES.pdf. Please ask any questions. Thanks.
CalculiX has 1D elements (beam and truss) that you could use for such analysis. Internally they are expanded to solids but it shouldn’t be a problem. Just be sure to run the analysis a few times with different numbers and types of elements to verify the correctness of the results - beam elements in CalculiX are particularly sensitive to that.