hertzian contact stresses, Stratic structural, equivalent stresses

hi,

I am simulating hertyian contact stresses and i have the boundarz conditions as

  1. Force 200N load ( red region in the image) on the outer ring
  2. other ends of the shaft are fixed


I have used share topology and the rolling eleimint is getting twisted and the simulation isnt giving expected results.

If i dont use share topology the elements are not contacting and moving away each other.

I have used a frictional contact between outer ring and rolling elemnt and outer ring and surface of the shaft.

i have usef augmented lagrange method formulation and stiffnes factor from 0.1 to 1.

I have given the interferance treatment to adjust to touch .

please suggest me what went wrong and any other boundary condition to stop the twisting of rolling element.

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