Interference Fit of a Ring on a Spoked Wheel

General Questions
2
  1. What types (formulations) of hex elements are you using ? Keep in mind that first-order elements are typically better for contact problems.
  2. Hex elements are definitely superior when it comes to uniform contact pressure distribution.
  3. What are your contact settings - hard or linear contact ? Default stiffness ? It often needs to be changed.
  4. Mortar contact may let you obtain better CPRESS distribution, but is also problematic in terms of convergence.
  5. Make sure adjustment is disabled for contact pair. Avoid merging nodes on both sides in other ways too.
  6. Do you model the interference as initial penetration of the parts ? Theoretically, you cold override it with *CLEARANCE, but it may not always work as expected: *Clearance tò simulate an interference - CalculiX (official versions are on www.calculix.de, the official GitHub repository is at https://github.com/Dhondtguido/CalculiX). (there is a thread about it on this forum too)
  7. Check this thread: Interference fit analysis (2D) with strange values - Tutorial 29 FEAnalyst and maybe this one too: Interference fit implementation
  8. You could consider using submodeling to get more accurate results in the selected region.
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