Shaft with key and sleeve - Torsional Loading Simulation

[Arline]

Hi,
I want to simulate the pump shaft,key and sleeve as an assembly to check for strength. The assembly is loaded with torsion and downthrust (axial load along the shaft axis)
I am defining contact between shaft & key, key & sleeve, etc.

My question is what boundary condition should i apply and where to apply on the parts ?

Please help.

 

[johnsmith2]

what software you use?

 

[Arline]

I am using ANSYS.