March 19, 2023 at 7:16 pm
Miguel
Subscriber

Thanks Peter,

  1. I see your point about not needing to lift the weight 50mm in the last 10th step. My idea was to show clearly (later in images for profane viewers) this has been retired and the table in its final exempt position. However I don´t quite understand your alternative of “fixing the pilot node…” and what the difference/advantage would be, or the problem with what I did…
  2. Fully agree but, how do I then keep the dead-weight from flying away in x/y directions and producing rigid-body motion problem? For example, if I set an additional remote-displacement for these DoF, I would be keeping it from moving when the table tends to drag it in those directions and would be also falsifying the real situation, wouldn´t I? May be a rough contact would do the trick?
  3. I am with you in this remark: in fact, I started with all-bonded contacts to make things easier and after that ran several configurations changing some bonded to no-separation and then to frictional trying to approach to the most reallistic model. I managed to solve them all but they all shared isotropic-hardening plasticity model for materials. Then when I changed the materials model to kinematic-hardening is when I began to encounter convergence problems and distorted elements appearing (which did not exist in formerly successful runs mentioned)…
  4. Here I enter in more swampy ground: I don´t know what this coefficient ratio refer to and how to deal with it. Regarding increasing results accuracy I tried to run a case using adaptive convergence but in this case I failed as I exposed in this other post:   https://forum.ansys.com/forums/topic/adaptive-convergence-for-accuracy/

 

Any other hint or suggestion you might have?