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These connections can transmit little, if any, moment and, therefore, are treated as pinned joints. The cross bracing connecting the two truss structures is bolted to the truss structures. Each truss structure is stiffened by internal bracing, which is welded to the main members. The two main members in each truss structure are steel box beams (box cross-sections). (I already tried to impose a pressure on the lateral surface and it worked but that is not the point of my study, unfortunately.The crane consists of two truss structures joined together by cross bracing. It seems that there is still a conflict in the fact that I impose the same the constraint twice at the same place. This way there are no conflict between symmetry BCs and "load" BCs.īut still I get the same message. The nodes have been identified in node set ErrNodeBCRedundantDof." So I tried another solution :Ģ) I defined 2 BCs (displacements): one for Ux and the other one for Uz, I also defined 2 analytical fields so that Ux is proportional to X (and Uz to Z). constraints are specified simultaneously. "31 nodes have dof on which velocity/displacement/acceleration/base motion etc. So when I try to run the job I get this kind of message : This is obviously incompatible with the other BCs (symmetry->no normal displacement on faces Z0Y & X0Y). I tried 2 solutions :ġ) I defined 1 BC (displacement) on the lateral surface (Ux=1/Uz=1) Therefore I would like to subject the lateral surface of the cylinder to a displacement. I would like to take non-equi biaxial residual stresses into account and study their influence. I am now confronted with another problem. I finally found a pretty satisfying mesh and managed to achieve very good results with it.
Abaqus 6.14 edge seed bias how to#
RE: How to refine an axisymmetric mesh in the contact region ? rstupplebeen (Mechanical) 3 Jun 11 08:00 The model is 200 times bigger than the contact region, the purpose was to avoid the boundary effects on the elastic calculations.
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I study the influence of residual stresses on indentation testing, the point of the preload step is to impose a non-axisymmetric displacement (for the moment it's just a pressure but I will fix this too). Has it something to do with large deformation?ħ.
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I am sorry but I don't get what the non linear geometry option does exactly.
Abaqus 6.14 edge seed bias verification#
Yes, I will once I have made the initial verification of my model.Ħ. We are not very into adaptative meshing (yet).Ĥ.
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Cheese is just a funny name I gave to my part. Indeed the load could be non-axisymmetric, that is the point of my work.Ģ. I already tried a similar mesh but I would really like to mesh with Hex.ġ. RE: How to refine an axisymmetric mesh in the contact region ? rstupplebeen (Mechanical) 1 Jun 11 15:29 If I get the time I will try running this model. What does the preload step do? Is this legacy? It is not turned on in the preload step.ħ. Nonlinear geometry should be used when contact or plasticity are used. I tried 20 global and for the 3 edges near indention bias 20 on the peripheral side and 0.5 near contact. Since you have switched to tets you can use adaptive remeshing to refine the mesh locally based on the loading.ĥ. The part name is cheese are you really modeling the indention of cheese?!?ģ. Why not axisymmetric? I was under the impression that the loading was non-axisymmetric otherwise I would have suggested it earlier.Ģ. Here is a running list of questions and comments:ġ.