Contact Settings plastic wheel to aluminium rail

Hello,
I would like to model a contact between wheel (plastic) and rail (aluminum) in Simlab (Optistruct).
Modeled is point contact. By applying a vertical force on the wheel, a pressure ellipse will occur, so that at higher force several elements will come into contact.
Which contact settings should I use to model a realistic contact between the two contact partners?
Many thanks and best regards
Stephan