I have a series of rods passing thought a wall through bushings. my interest is what happens to the objects held at the end of the cage. Its one of these things:
So you have end plates holding 4 bars and in between you have a plate with 4 bushings. As you move or apply a force the rods should slide through the bushings and create reaction displacements of the end parts. I only care about the displacements at the end parts and would like to have the rods pass through the bushings without any friction.
So far, I’ve sectioned the part of the rod that passes through the bushing and created a node set that I then attach to a reference point through a rigid constraint. The reference point is then given a boundary condition constraining the xy to 0mm and leaving Z free.
This sort of works, but the rods don’t follow the bushing holes obviously. how can I constrain the same reference point to two node sets?
I’m going to try a few things, but welcome any input.
Indeed, contacts can be quite problematic and they may increase the analysis time significantly. But they are often unavoidable and I would use them here as well. With proper local mesh refinement, the simulation shouldn’t take that long.
Such a mesh might be too dense. For initial calculations use rather coarse global meshes with local refinements in critical regions (with high stress gradients) and then refine when needed (following a mesh convergence study).