Gurus,
I've just been assisting a colleague (who's new to Mechanica) to set up an analysis. This analysis lends itself to cyclic symmetry, albeit only two-fold. He's successfully split the surfaces (actually using volume regions I think) and created a cyclic symmetry constraint, which has correctly recognised a 180° angle.
However, when we run the analysis there is significant displacement into the symmetry 'plane', and it's all in one direction ('outwards' or 'plus material') rather than the 'S'-shape I'd consider acceptable for this constraint. It looks suspiciously as though it's not actually enforcing the constraint, or at least not as we want it.
Possibly relevant: this is a contact assembly with two components and several volume regions on each, underneath the contact location in 'onion layers'. He's selected all the relevant surfaces for each half of the symmetry constraint, and there are no obvious discontinuities in the stresses which would suggest a missed surface.
Has anyone done this before and encountered similar?
Thanks!