April 19, 2020 at 1:57 pm
Wenlong
Ansys Employee

I think fix support should be enough. 


Fix support does not lock 6 DOS in all the cases, for example, if you fix an edge of a shell, it only lock the translational DOFs but still allows rotational DOFs, and that's why there is a "Fix rotation" boundary condition. 


If you are using solid elements, there is no rotational DOF for solids, so using fixed support should be fine. 


Regards,


Wenlong