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JohnM
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Just looked at that paper, fascinating stuff. I think it's useful to run the modal analysis first, as this will give you some idea about your required time stepping. For example: 1/(frequency * 10) might be a good start.
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Attached is a simple example using temperature dependent properties using CCX custom model definition. Run with different temperatures, and deflections will change. CCX custom commands open up a lot of potential to extend your capabilities, so it'…
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@3rav, we'd like to try a modification to CCX that I discussed with Guido, but we are not proficient at compiling a Windows executable. Can you provide a recipe here?
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I think your mesh did not make solids, Mecway thinks your model is shell elements. You have multiple parts, they need to be read in as individual STEP files and meshed separately. You likely got a "Gmsh may be bad" message at the end of your meshin…
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@prop_design F77 here as well. But everyone around here is a JavaKid or PythonKid. They've missed out on the thrill of debugging a 5000 line spaghetti code
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Python script to create center node of circle between 3 points. I just adapted this from old FORTRAN (no jokes), and it "seems" to work. I can't tell you what it is doing with more than 3 nodes selected - I tested a few examples and it wasn't clear…
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@disla I suggest you look into getting good at reading/writing liml files. Once you set up this reader/writer, you can do a lot of things, and probably faster than waiting for an update from Victor (who in fairness, has to manage priorities). We …
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Look at Program Files > Mecway > Mecway13> Samples, there is a file called MeshGenerator.xls. This is at least an idea starter. I would also recommend looking at the Python Scripting functionality, but you need to use this interactively in…
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This might not be what you are looking for, but once you realize that solid elements do not have rotational degrees of freedom, merging two nodes across solid components makes a pin, which can be handy in some applications.
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While we are on this subject, I will point out that PASTIX is a rocket of a solver, but I have found that you need to keep your PARDISO handy, because PASTIX will sometimes struggle to converge when PARDISO does not.
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Look into PvPython PvBatch. It's standard punishment for interns around here to capture good post activities in paraview and save as Python script. Also check out Paraview Glance https://kitware.github.io/paraview-glance/app/ This is a neat li…
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The *TIE tolerance will only move slave nodes towards the master surface. If the master surface is much finer than the slave surface, you will still have the issue in my red nodes/blue nodes sketch and your test problem. But for reference I would u…
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When you use the finer mesh as the master, you are bound to get nodes that "float". They won't show up in any constraint equations, because they don't have a home, as in the figure below: These are the nodes that don't get attached, and create th…
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Stresses will usually reveal "missed" contacts. In your case though, SWAP your master/slave surfaces. Mecway and CCX use asymmetric contact, which mean this matters. You generally want your slave surface to have the finer mesh. Also, get comfortabl…
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Click on part in tree, that selects elements. Click the node icon at the top of the view port, that selects the nodes attached to those elements - the selected nodes will be shown at bottom
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One simple way is to look in the tree at the component created. Also, there is a running tab at the bottom, with the third entry being whatever is currently selected:
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I am pretty sure you can export from IA-FEMESH to ABAQUS format. This is nearly identical to CalculiX format, and you can import this directly. It's possible you'll need to make minor modifications to *SOLID SECTION command, but I would just try im…
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We do a lot of this. If the parts around the o-ring are much stiffer than the rubber, there is a nice trick. Attach a layer of "stiff" material to top or bottom part (make it a sector model as well). push with only one node that you have put into a…
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Look here in Calculix manual, see simple youtube example (does not include harmonic)
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Here you go. As Victor suggested, I added a small ring of shells just above the pipe and made them my surface. Select that surface, switch to "nodes connected to that surface" and use the "insert node between" to get a center node. Name both the fac…
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Mishal, you make me feel spoiled - we export to STEP from Solidworks or Inventor, and most of the time they simply mesh (especially in Gmsh). If we want to simplify the geometry, this is usually done in those CAD packages as well (sometimes in FreeC…
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Try node-surface coupling
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I ran this using Steady and Transient with t=100000, both ran fine and gave same answer. Running CCX 2.16, tried different solvers, all worked. Even though Mecway gives warning, RADIATE command still gets written to CCX deck.
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tried it, same issue. Strangely though, I read it in/out of a CAD package and it "fixed" the issue.
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For Python users, there is a nice XML parser built in that makes quick work of manipulating Mecway models files.
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Happy New Year Dave, I am always impressed with people who can accomplish something with Salome. I have downloaded that thing and then punted more times than I care to admit. That big bloated 2 GB install, the six rows of menu items, I just don't g…
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If you are doing this to code, you will want to look at AWS methods or equivalent, and possibly require someone with AWS certification. There are specific guidelines for modeling welds and evaluating results, and they have more to do with getting jo…
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https://mecway.com/forum/discussion/762/a-case-for-load-cases-folders There's some discussion here about running batch jobs. If you want to take this further, Google "Optimax Matej", you'll find a free code that can automate running a job in ba…
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If a mesh is too coarse, the peak stress will not exceed the elastic limit, you won't activate plasticity, and you won't get permanent deformation. Run your model elastically, note areas where the stresses overshoot the yield strength. Make sure yo…
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Mesh matters here. If you under-predict stresses, you won't activate the plasticity as soon, and you'll likely under-predict the plastic strain and the permanent set.
