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Sergio
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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?
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If I remember well, when we create lower order sub meshes in Salome to adjust/force the mesh to some pattern, number of elements or wathever, this submeshes are keeped in the main meshes, in some cases I had to delete manually those kind of element …
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Hi @denissps , I was able to mesh with line elements in Salome and export succefully to Mecway lot of models. All my meshes were only line elements, maybe you can try exporting as two separated meshes (one for beams and the other for solid or shell …
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Now that the program has the preload boundary condition, maybe a new "hexagonal plate with circular pattern at the middle with no triangles at all" and "hexagonal plate with circular hole" could be usefull to build precise bolts and nuts with hexa e…
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Thanks! In fact for conformal meshes still I prefer Salome.
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Nice trick from the SimCommons team! It´s a simple picture imported with the text, and attached on the back plane. Very smart :-)
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Hi Dave, maybe if you could upload the initial step we could get a better idea or try by ourselves. I usually use Salome to create hexa meshes, but is not very friendly :-)
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There is a difference in this FEA model against the P-Veng, look in the plane zone bellow the pipe, that is present in the results but not in the drawing. I will fix as soon as I have a little of time, saddly I don't have the editable geometry, but …
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These are the project files in case someone one to try https://drive.google.com/file/d/1qlSoiOQNtQe6HhbdEVFaHbAQojy6SB7s/view?usp=sharing Still I have to finish to understand why Pveng report shows Pl+Pb+Q mostly and not Pl+Pb, this makes hard to …
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Hi @disla , as far as I remember I have used frictionless support for taking in count the axial simmetry
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As far as I know we cannot replace the version of netgen that is included with Mecway. Would be nice to have a way to do it, so we could chose mesher program and version, the same as today with the solver. There is a very usefull feature on Netgen s…
