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Sergio
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Nice update Victor! Related to @Sebastianmaklary comment, would be nice to have the option so choose the solver (Spooles, Pardiso, Pastix...) when the user select CalculiX as solver, and in the Options windows a place to specify the number of cores…
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That´s amaizing @disla ! I remember have seen a FEA model of a roller coaster with the buggy moving all around, does this kind of modelation in Mecway/CCX take in count inertial loads due to speed of movement?
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Thanks @JohnM ! I'm working with the internal solver so this is not a problem, but is good to know also for CCX. That "Modify Keyword" feature is very interesting :-)
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I found it :-) Would it be nice that the menú option would be available from the results itself, and an option to writte it to a new file.
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thanks! @prop_design Now I realize that this exact mesh can be done directly in Mecway meshing with surface elements (with the option to use quads), and then revolving to get the hexas.
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I would start with a mesh generated by Netgen standard inside Mecway (taking in count the size of the elements to have at least three in the main thikness), so then the mesh and BC can be associated to the imported CAD geometry. If standard Netgen d…
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Maybe you could solve your problem, make a copy of the file and then remove all the bc if you don't want to share how you did it.
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https://imgur.com/a/UjArmJ6 https://www.reddit.com/r/fea/comments/9uatvs/help_fea_3d_printable_models_with_color_mapping/
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You could open your CCX results (.frd extension) with FreeCAD, and then export as STL, even in deformated state. Now I don´t remember well if is FreeCAD, Salome or Paraview, but is possible, I have even 3d printed with stress colors a deformated mod…
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@LorenzoS, the first thing that you must understand is that not always the finished CAD model, with all the small details is the best for FEA, there are a lot of features that will complicate your mesh innecesary that will not affect the results. Al…
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and the project files as well
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Finaly I was able to upload the pictures
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Part is simmetric, and if we sacrifice a little of accuracy, we could say that is axissimetric and reduce a lot the size of the model.
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Hi, this would be my workflow, normally I would choose the hexa or axissimetric mesh for solving this vessel. For some reason I cannot post images here since a week or two, have uploaded to imgur https://imgur.com/a/JfwVrIZ
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Hi, welcome to the forum. About your questions: 1) For modeling use the best CAD available. At work I have Solidedge, at home Alibre Atom, and sometimes as last resource FreeCAD (for split faces on parts made with Alibre, as it doesn't have a speci…
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For analizing this simple bush the outer/inner sleeves are not needed.
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Yes, zooming performance for big models is not the best. Another helpfull option would be a new dedicated tool to "zoom to selected area" directly.
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Very very nice model... a last trick. In order to better/quick convergence all the loads are applied as displacements and not forces, and, a RIGID BODY is created between the movil side (inner sleeve faces in this case) and a node in the center of t…
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@disla, the procedure for simulation is the normal for a silent block or any part that is molded with plastic or metal sleeves or inserts, due to the big difference in thermal restriction of rubber and those other materials. About the press fit, the…
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Woooow, nice example @disla, but there is a mistake. The order of the loads must be: 1) Cool down the part from mold to room temperature (so the temperature and restrain is a lot more). The rubber will get streched in this kind of assembly as in yo…
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If is only for compute the stiffness or stress in the part, for a cylindrical bush the inner/outer sleeves are not needed for the simulation (unles they get in contact with the rubber or have some special shape). The press fit can be modeled using a…
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Some pictures and animations of a very simple bush: https://drive.google.com/drive/folders/1BNMXJYl-5QSG4qEw49QTRvr0yvvjuDiV?usp=sharing Be carefull in case you include the outer/iner rings, as CCX will promediate the stress between rubber and met…
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Hello @Alex, for rubber bushes is very important to take in count the thermal restrain prior to the assembly operation and then the mechanical load, due to the high stresses related to high thermal restrain of rubber compared to metal or plastics ar…
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@kennethfugate in the automotive industrie, some manufacturers ask you for postprocessing stresses at a layer of shell elements, will try this to see if is possible. Guess that they do it for getting the stresses at the real surface of the part and …
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Thanks @JohnM !!!
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I have more succes gluing different parts directly with TIE and not ELASTIC.
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My workflow for beam structures is model the frame in FreeCAD as several sketchs if they lay in a plane, or some more complex 3d curves for beams with weird curves. Then I export to Salome (not remember if as step or igs) and make the mesh there, gr…
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Hi @majkus , there is only one element on the longer side, it should be at least three to connect to the vertical members. You can select the four elements, and then refine by three. After that move (drag on the screen) the nodes of the horizontal m…
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If the problems are related to the shell elements, the geometry of "VISTA ISOMÉTRICA" is relative simple and could be meshed with hexa elements directly in Salome.
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Nice model @denissps, could you share a picture of the stress also? Was CCX or internal solver?
