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Sergio
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Comments
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Nice project! I would work in the cad to get the midsurfaces, and then export every component as a single step or iges files to be meshed as shells in Mecway. Another way would be mesh as solid (but using a 2d mostly quads extruded to get hexas/wedg…
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Have checked the step, is a very bad quality shape probably created from a stl then converted to step (due to the big faceted triangled faces). In my opinion will be better to recreate the geometry in the cad because is a simple cilinder, than tryin…
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Hi Guillermo, just for check it, using CCX 2.14 I was able to solve easily your last model.
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I agree with Dave, very nice model
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As far as I know is perfectly possible, even if you don´t add or remove features (faces), the boundary conditions should keep in place. Just be sure to add the bc based on faces of the step, and not of the mesh. In case the bc were not reatached to …
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Just one tip, use three second order element in thikness, lineal elements can underestimate the deformation for sheet metal parts. Your part is very regular, can be easily meshed as a revolution mesh.
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By the way, the actual sector has a bad angle, about 9.xx degrees, so there will be more than 36 sectors. That's why in the results there is a small gap between sector, and I was forced to use the CHECK=NO option to be able to solve it anyway.
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Now I'm not remember well if is included or not in the Mecway interface, but you can add the card by means of custom CCX data on the tree. Check the attached model
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In case of using CCX solver, check the generated input file and look for this line. N is the number of sectors that makes the whole goemetry, and NGRAPH is the quantity that will be saved on the results. For having a complete representation both num…
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If you work with the CCX solver there are three system variables that will let use n quantity of cores of your pc: • CCX_NPROC_STIFFNESS to create the element stiffness matrices in parallel • CCX_NPROC EQUATION_SOLVER to solve the system of equation…
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Export as .unv
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But do you have well defined (a partition on the faces) each thickness region? In that case can be done also en Salome creating groups of elements by face and then in Mecway assigning a different material/thikness to each group (previously you need …
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You can import all the steps in Salome and make a union (partition on Salome) of the steps to generate then a conformal mesh.
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Thanks for the support. I have removed the horizontal constrain to be more like the real situation, after that both models shows about the same deflection (20mm). For the lineal model, internal solver gives the same result, didn't try yet with the n…
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Probably if you solve directly with CCX you can use CGX with batch commands to postprocess and get the stress/strain plots, results and then you can link to your report generator program.
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I don't have Mecway on this PC installed, but you need to define first the node set and after use the custom CCX feature on the model tree to enter the card exactly as I write (if the orientation of the model agree with the picture).
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Hi, have made some stents in the past. You can use the CCX card *TRANSFORM to relate the inner nodes of the stent to a cilindrical coordinate system: *TRANSFORM,NSET=NSET_INNER,TYPE=C 0.,0.,0.,0.,0.,1. Also, your model is simetric, so you can use…
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Hi, have you tried with CalculiX solver and *CYCLIC SYMMETRY MODEL card? I have tested for static analysis and works very well, it allow you to create a very good model (fine mesh) of one sector and then compute the results for the whole part (even …
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I have imported the dxf over an empty new file in Mecway, and the error appears. If I try open in place of import, I can import it and see in the tree that there are x elements (the number of lines of the dxf), but nothing in the model display area …
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Have checked with other files (solid steps), and I was able to import the 3d model, but is not visible. After meshing the same error appear, so probably is a problem with this particular Windows installation. One interesting thing that I found was …
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Have imported the lines in Salome (as igs), then mesh as 1D element and export as UNV and import in Mecway with the same error
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Have uninstall/reinstall the new version and still cannot open dxf, the error is the same
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Thanks for checking, I will try to re-install, as I have the same version as you. A very weird thing because last week the dxf importing was working ok on this machine. Regards
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You could solve the problem as no lineal with lineal material properties. "If you want to control the sequence in which loads are applied or ramp them up gradually, check the Quasi-static box and specify the Time period and Time step size under Ana…
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If you upload the steps incuded in the model I could give a look later. Take a look on the forum, there is another thread with something very similar.
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Jola, do first a 2d quad dominant mesh on all the geometries, and then just extrude the faces that you need to create the hexas/wedges. Then you can delete all the rest 2d elements
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Hi Jolan, welcome on board! One of the mantra of my first FEA mentor (a venerable French guy also) was... "Sergio, remove all the unnecessary areas of the model" and he was very right! Removing the features and volumes that will not help you on the …
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You can separate the faces on your CAD leaving only the cross section and just export this faces, then mesh with cuads and revolve it and create the holes using the specific tool. For meshing with coincident nodes you can mesh it on Salome, or Gmsh…
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One thing that I do in some cases is reduce the quatity of datasets that CCX saves, so by example 1 every 2, or 1 evry 5 in some cases or less. This reduce the global size of the result file. Use the FREQUENCY parameter on the NODE FILE card: "FRE…
