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Victor
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Comments
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mfem looks spectacular but none the examples I could see have the transitions between element sizes needed for Mecway or CCX. It must be for some other method or element type that allows that very easy kind of mesh where corner nodes are connected t…
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If you just want a grid of nodes or rectangular elements at the points, rather than holes, you can do: 1) Mesh tools -> Create -> Quick square 2) Set the node coordinates of the corners 3) Mesh tools -> Refine -> Custom 4) Select rows an…
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It's a very small element that can be hidden by the mesh lines. Check the status bar to see if more than 0 elements get selected.
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@prop_design, when the solver fails, you can press the Select elements button in the Details window to find it. It's a poorly shaped one. I guess you'd have to tweak the meshing parameters to get rid of it, or add a local refinement. There's two lik…
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Updated to Beta 2 with these changes: * Extra E3 parameter for laminates. Elastic modulus in the 3 direction. * No longer sets OMP_NUM_THREADS environment variable for CCX. * Bugfixes: At high DPI settings, there were misplaced controls and t…
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If you were to use the same DXF file, Automesh 2D on lines needs a single closed loop (optionally with internal loops, but you don't have those). So remove the internal lines and merge the open ends (View -> Open cracks shows some gaps). Then you…
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@cmmcnamara - the speed you described is about what I get for the default settings. But with all 7 speed sliders (attached picture) set to maximum, it does several revolutions per second and panning hard just makes it vanish off the screen instantly…
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@cmmcnamara, there are no speed settings for the SpaceMouse in Mecway. Could you please measure roughly the time taken to do a 360 degree rotation and to pan across the whole screen with the controller at its limit? And also the speeds you prefer. …
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That's great news. Not only will it be good for post-buckling, but I hope it'll also solve a lot of convergence failures that happen with contact.
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Not sure how (von Mises) safety factor can be negative. Could you show an example? But yes, very low safety factors can be caused by badly shaped elements which tend to have greater error in stress for their size, sometimes quite extreme peaks. Ther…
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It's the other way round (reference temperature is the initial temperature) so it will already be doing what you want. Yes, you can reverse the effect by negating the 6 stress components in linear analysis because stress is proportional to load and…
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Oh, good point about the rotation. That itself is suspicious though because of symmetry and it might be taking energy away from the linear motion. Normally, I'd say it's not reasonable to expect the same results from the same inputs with different …
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Does the CCX one rebound above its starting height, violating conservation of energy? I got a little bit of that with an orthotropic material but mostly it won't solve that far and I lost the special material that worked! One source of a difference…
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I got it to bounce off the surface before it fails with these changes. Not sure if all of them are necessary: * Removed back surface of plate from contact. * Changed plate to quadratic elements. * Refined plate. * Turned on Automatic time s…
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tk1537, I don't see why not, it just hasn't come up much. You can write the formula in a spreadsheet though and copy and paste the table to Mecway. You have to put a column of commas between the two values though.
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I hope to add a simple option to turn on cavity radiation in future. In the mean time, here's an example doing it by hand. It's a bit of work, something like: * Make the model using ordinary radiation. * Solve. * Open the .inp file and copy …
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I don't intend to make it a more general PDE solver like COMSOL/etc. But CCX's radiation between surfaces would certainly be a good fit. Not quite yet though. For now, you'd still have to define that by hand.
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Oh, that's a good point cmmcnamara. I don't see a problem with that. The CCX manual has a little table listing the relationship between thermal and diffusion variables too.
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It's just a different sign convention. Mecway follows what seems to be common for FEA software. I'm not sure if there's an important reason for that difference (something to do with being 3D?) or just legacy. Consistency with bending moments like yo…
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Not that I know anything about Salome, but that whole mesh looks like just a first pass without some optimization or shape improvement steps that would normally smear out those perfectly regular grids and high aspect ratio triangles or split them in…
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No mass participation, sorry. Thanks Famous_Mortimer
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That's probably more of a question for Guido from CCX. If you can afford a few hours, you could have a go at compiling CCX which would be the first step to writing a user subroutine. There are step-by-step instructions along with the source code inc…
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I'm not sure if there's a way to get CCX beam results per element. There's element stresses at integration points available in the .out file using *EL PRINT though. This might be a lucky accident but if you assign a section shape to the spring mate…
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I think it would be possible by writing a user subroutine for a load, such as a concentrated load. Section 8.4.2 (or 9.4.2) Concentrated load (cload.f) of the CCX manual says that node displacements for the whole model are available to the *CLOAD us…
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Hopefully by the end of February. No new meshing options but some new features will be: - A built-in Python interpreter and partial API for writing scripts to read solution data and a few other basic operations. To be extended in subsequent releases…
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Yep, that one.
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Not unless there's enough demand. The reason for removing the integration was that nobody seemed to use it and it was complicating the code. Note that Tochnog Professional is different from TOCHNOG. From what I understand, TOCHNOG is older and less…
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Here's an example with just a Z-direction spring. You would need to repeat it for the other two directions. The two beams are only separated for clarity and the spring element's length and orientation should be ignored by the solver. What's going o…
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This sounds like what the SPRING2 element in CCX is for. You'd have to define them using CCX -> custom model definition. See SPRING2 and *SPRING in the CCX manual for details. I don't know of any limit on the number of equations, but the GUI wil…
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Hello Mishal - Soil only as a linear elastic material, as far as I know. You might look at Tochnog Professional for soil which is now free. It used to have an interface in Mecway but they are now only compatible by some common file formats. - No. T…
