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Sergio
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Comments
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Bonded contact should be work (be sure to use TIE option) or you can apply a temperature to the rod and thermal properties to work with the dilatation of the material. In this case you need to work with the CCX cards in the custom step feature.
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That´s the things that keep me away from using shells on CCX, have know that we cannot use TIE, but also the artifacts that it creates at the angles (knots) or find weird how the boundary conditions are traslasted to the expanded nodes. Another draw…
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As far as I know CSV are always generated in the same way no matter the regional configuration, maybe this could lead to other problems. I live in Argentina and even if we use commas for decimal separator, I always modify the regional settings to us…
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Could be as an extra tool, but why not an option on the program to keep outside by default? I mean, Abaqus, and NX does in that way to don't inflate the models files. Regards PD: I can answeer myself... doing an extra tool is easier, is just readi…
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By the way the creep will be present if the hook is stressed at temperature for long time, in your case maybe would be outside of the furnace so won´t be affected.
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I'm working in a similar problem, a table to support some assemblies that will be under thermal release stress treatment at 730 degrees. One thing that could be a problem is also creep, at high temperatures could be significant. We are constrained a…
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I agree, for long runs is nice to be able to see and update the progress of the increments.
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Victor, that option "mesh only and choose units" will be perfect, because most of time that (at least me) I do it is for continuing writting my own cards separately. I'm constantly adding those "Don't generate keywords" entries in my models. Regards
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If you use coincident mesh (made it on Salome) there is no need to bond as they share nodes.
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Another option would be making a volume division on the geometry using Salome, then join both and make a mesh on that joined geometry, to have a continuos mesh but divided exactly where you need the plane with coincident nodes. Then you can export a…
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One thing that we as user must recognize is that this kind of problem is not only related to Mecway alone, Abaqus itself has the same behaviour sometimes (the inp files that Abaqus CAE generate are not so easy to read by human eye, or worst thing so…
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I also use a lot of sharing inp (or at least import/export/fine tuning), so it makes a little complex to see forces or pressures applied to each node or element face. Andrea, one thing that sometime did for improve the reading of input file is gen…
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Yeah, were ten years ago or more. I use solid element as I neeed to compute the slippage and separation under the bolt head at ultimate loading of aluminium brackets. We divide the shaft of the bolt, normally the non threaded portion and apply only …
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Look for the CalculiX 09 channel in Youtube, he has made some video of this kind of unions using bolts. With CCX you can use also the PRELOAD card to apply directly the bolt preloading. By the way Andrea, how do you apply the temperature preload to…
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I have seen Tekla for creating those structures and joints, it has some kind of library for them.
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You can try any 3D cad as Freecad, Salome (yes, simple geometry can be generated there), Onshape, Fusion 360, Solidworks, Solidege, NX, CATIA...all will generate a STEP file. Regards
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Have made some analysis (and real vacumm tests at low and high temperature) of this kind of part in the past, for pickup engine air intakes. We use EPDM rubber and other solver in that moment. As Victor says, you need to perform an no lineal static …
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By the way, if you are working in make optional the field variables (NODE FILE and EL FILE cards in CCX), could you add the NODE PRINT card available in the GUI directly also?
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User calculated resuls sounds great. I use it in Nastran computing first individual unit load cases and then combining the results to create multiaxial loading. Could it be that some crude damage be calculated maybe? Regards
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German, nice to meet you, even more knowing that you are involved with UTN!!! I live very close to UTN Pacheco... About your problem, try to change the place were Mecway save the simulation files to the same folder as the lml file (in the options m…
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Guess that they are like the selection tools, at the begining one can be reluctant to adopt it, but after we found more and more oportunities to use it. In most cases an experienced user will not need it, but sometimes is good to have a quick tool t…
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Today I did some test to see the graphics capacities of Mecway, so I took a medium size mesh and with the refine command divide by two the size and run again the calculus to see the differences in results, and Mecway performance. First I notice a bi…
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Try hiding the element edges, or better, improving your mesh to don't have such quantity of elements for a simple model. Anyway, managing such big models can be tricky in Mecway, a little better on Prepomax, but nothing is perfect. Worst thing is …
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Back to this thread, is possible to compute stress linearization on Mecway for shell or axisymmetric elements? Have made some tests last week with no success. Regards
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I never did such comparation (lineal vs hyperelastic behavieur), but guess that with the right Young Modules and Poisson coefficient at low deformation deformations should similar. I will try tonigh with a sample to see the differences. Regards
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Nice model Barrti. One of the drawback of using CCX with beams elements, is that if you define a circular/anular section, the results will show it as cuadrangular equivalente sections. Regards
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What's the aim of your simulation? All depend on that, if you need an rough estimation of deformation, then maybe is enough. If you need to predict stresses, or durability I suggest you go further with more complex material modeling. Regards
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True is as a rubber FEA part analyst for years, I never use this kind of coarse aproximation for rubber, I always use hyperelastic with specific material coefficients. I have told to use such a coarse representation of the rubber only in case that i…
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My votes for a built in material database! I have the same problem, have started saving all my materials in one file, but then when I import it, all materials came on the actual model, and even if they lay on the unused material branch, some warning…
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For EVA I would choose hyperfoam material, is not available directly from Mecway´s interface, but you can easily setup by means of CCX custom cards. Now stiffness of foams will depend on material and density, so you must perform a kind of material c…
