Peter,
Yes, the screw is a solid body and it was subtracted from the vertebrae. I know the yield strength, Young’s modulus and Poisson’s ratio for each material.
So your suggestion is to use Explicit Dynamics instead of the Static Structural?
this is the force convergence plot of the analysis i'm currently trying to solve - unfortunately, it got stuck at 60 iterations and doesn't proceed for 3 hours now.
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