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Sergio
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Comments
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There is a specific boundary condition in Mecway/CalculiX called Pre-Tension Section
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If you think that there will be contact between de bolt body and hole, then you need to apply contact with separation at the two bolt and nut heads and plate to allow the slippage, otherwise the TIE will prevent the internal contact. Also add the bo…
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In my opinion the level of penetration in the plate to plate contact area is too high with your model set up. I have changed the contact between bolt head and plate to a basic TIE, and increase a lot the contact stiffness (up to 16000 Gpa/mm) and ge…
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Hi Manuel, I was able to solve it reducing the element size of the thin component and changing the contact parameters to basic TIE configuration. Still didn´t have the time to analyze the new bc of this new version of Mecway, but can you tell us why…
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Guess that the path is starting with the default contact stiffness, and if you see that the contact is not detected at all, switch the contact pairs. If you see that there is some penetration in the contact area, then increase the contact stiffness …
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In fact, I didn´t find any improvements using the other contact options or kind of contacts in my mechanical simulations, is just a matter of adjusting the contact stiffness and sometimes switching the master/slave pairs.
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Hi, you could define the surface or node groups in Mecway, and then define the contact as a CCX custom model definition, and writing by hand the appropiated cards.
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About the copy to clipboard function, I use very very few times, maybe if it would be available as an option in the contextual menu in the model tree when we select the field to postprocess, or maybe adding a new contextual menu to the graphic area …
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atacched
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I think that with a model with more element in thickness should work well the cyclic symmetry. Another issue is that Mecway cannot separate components in the results if you ask for the symmetric results.
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I have used very few times the cyclic symmetry, attached some examples that I did years ago (was not implemented in GUI so I wrote the cards manually), hope it help you. https://drive.google.com/file/d/1rUnfCIAdxrY3Nx6fUAcNqFWH_GCyIufH/view?usp=sha…
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Attached the model solved
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I use wedges for structural simulations and they behave well. This model can be solved easily with frictionless supports in the simmetry faces and high contacts stiffness
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@Victor, could be that the program shows the colapsed elements with the same red cross symbol as the distorted elements? In that way we could figurate quickly the error.
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Pay attention that you have colapsed hexas at the center line of the model, it should be wedges. Use the tool Merge nodes witi a small tolerance such as 0.001 mm to stich the nodes and convert the colpased hexas in wedges. With that at least the fa…
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If you look to convert groups of elements to components, there is a way to make it by means of a python script, look in the script post: https://mecway.com/forum/discussion/1020/python-api-scripts#latest
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I found a way to make it in Gmsh, or even inside Mecway using Gmsh and custom commands, but to me is easier to do it in Salome directly. https://mecway.com/forum/discussion/808/conformal-meshes-with-gmsh
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I think that these anotations could be translated into the different input files (CCX and OpenRadioss), so it should be only text. 1. For the analysis could be a separated text field and branch in the model tree (*HEADING card for CCX, don´t know …
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You can use Contact with Bonded option, but you need to remove the first two faces of the slave surfaces (because they are also restrained by the Fixed boundary condition). You can fuse the faces in CAD and export as one step file, and then mesh wi…
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I support that, revisiting old analyses after years can be tricky, and having a short note explaining the reason or boundary conditions can help a lot.
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ffontana, in the last two versions there is a new very powerfull solver available for Mecway, OpenRadioss. Guess that the developer will include some more features of this one before tryng other. By the moment Mecway has the intenal solver, CalculiX…
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Hi, which features of Mystran you would need it? As far as I know most of them are covered by CCX or Mecway solver.
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The integration with OpenRadioss looks amazing, same for Alibre Desing. I think that Alibre + Mecway is the ideal setup for freelancers engineers/analyst. I can't wait to have a moment to try out all these new tools!
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Did you try to export the CAD from Solidwork (remove small components before) as an STL and import in Mecway? With solid meshes sometimes I export the results to Paraview and then import also the CAD model to compare there. With this kind of struct…
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If two or more named selection could be visible at the same time, then would be usefull having the oportunity to define different color for them also.
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I suffer that problem designing and testing (FEA and physical tests) an engine mount aluminium bracket twenty years ago (or more). For low loads the initial bolt preload was enough to keep the part in place with the bolts centered in the holes (slot…
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Yes, for models by made several components takes a lot of time to create the TIE bc. Automatic contact detection would be great.
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I'm sharpening my arguments to propose OpenFOAM support as well :-)
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Hi @Thomas, it looks like an old feature of NX Nastran where we could compute some unit load cases, and after combining and doing some calculation.
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@FERNANDO, of course, working outisde Mecway is 10x more complex and time consuming. Still I don´t understand why also in Paraview as in Mecway cannot pick a node and get the field variable as with CCX results. In this example the 2d plot is from a …
