Dear community,
I am trying to run a transient structural analysis to simulate the rolling contact between a wheel and a rail. However, in the rolling step, the wheel just keeps going through the rail body without contacting it.
The boundary conditions are a fixed support at the rail bottom face. A displacement boundary condition that only allows displacement of the wheel center in the vertical and longitudinal directions (z and x respectively) as well as rotation about the y axis are applied to a pilot node placed at wheel center. A force condition of 75000 N in the direction vertical direction is applied on the pilot node at wheel center. The contact between the wheel and rail is frictional contact. Please find attached a figure of the problem I obtain and the boundary conditions as they are defined in apdl.
Thank you so much for the help.
Best regards,
Hajar
It is perhaps simpler to calibrate the contact model in a steady-state analysis.
It is even simpler to use Workbench
Dear sir @Tomáš Létal, after meshing the wheel and rail pieces I followed this path to define contact between the two bodies.
Preprocessor>modeling>create>contact pair. Then contact wizard window is opened and I started selecting target side ( upper surface of rail) and contact side (bottom surface of wheel) then I defined symmetrical pair and I defined friction coefficient of 0.2 . After this I opened advanced settings and I choosed standard contact type and I also selected (close gap/reduce penetration).
Sir @Tomáš Létal, I also tested the contact statut using the CNCHECK,Auto command and it gives these results about contact statut analysis. Maybe this can give more complet information about the contact definition.
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