I don't think that rotational constraints are necessarily "ignored" by mechanica. Every FEA package i've seen has translational and rotational constraints, and they make sense in cartesian coords. I'm just not sure how mechanica really handles the rotational constraints in polar coords when...
I like the idea of using polar constraints. I think I remember something about that now from my FEA class in college. What's confusing to me is that when constraining in polar coords, it asks for Dr, Dtheta, Dz, Rr, Rtheta and Rz. Isn't Rz the same as Dtheta? I'm not sure if i'm setting up...
I'm actually having a similar problem with bearing constraints in Pro/m, but i'm not sure I follow your advice, JohnAndrews. Split the model how? Are you basically trying to simulate spider elements, which mechanica doesn't seem to have?
I'd appreciate some further explaination of your...