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Anyone got ideas on how to do FEA on bearing surfaces?

Question asked by Jim Riddell on Aug 25, 2014
Latest reply on Jan 9, 2015 by Jared Conway

I've got a bearing contact surface with 10mm wide cylinder of 13mm radius against a flat surface.  (Assume steel on steel for starters.)  I'm getting no where near what the theoretical Hertzian stresses should be in a real model I'm working on.  When I run a simplified model and get the mesh down to the order of 1 mm then the stresses are about what they should be (~112ksi)  (Yes, I know I'm mixing units but that's not the problem.)

 

When I run the same on a full model I get totally unrealistic numbers on the order of 10-50 ksi depending on the mesh size. When I use local volumes at 1 mm mesh size I end up with about 25ksi.  Still totally unrealistic.  Linear Static gives bigger numbers than the non-linear static.

 

 

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