I have a question regarding the best way to determine if a lead screw will bind under a combined loading of temperature change and pressure.  The lead screw is steel and the nut that interacts with the lead screw is made of Delrin.  Knowing the configuration of the screw, I have the following questions:

1) After applying the pressure and temperature change to the axisymmetric model, is there a way to determine the relative binding due to contact/friction between the two parts?  I understand that the axisymmetric analysis does NOT represent the helical configuration of the actual geometry, but I am hoping to be able to see if the intended motor used in the system might stall.

2) Is there a neat way to maybe integrate the output of CPRESS over the "helical" length of the thread - each gear tooth in the axisymmetric model?

3) Do I have to succumb to creating a 3D model to get the stall load (torque) based on various levels of contact friction?

Thanks for the help.