Thank you. I'm still a little confused.

Please see diagram below of what I would like to achieve:

I would like to ultimately be able to vary the degree and then constrain movement within the bottom layer (pink/salmon colored, frictionless or rigid as I don't care about it's deformation, currently), then apply an axial displacement on the tubing to see the characteristics/behavior that occur within the free movement plane. 

I hope this helps clarify. Any input on how to best approach this physical problem is greatly appreciated.

Kind Regards,