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@LHartly, it's @Disla who's the big thousand-word photo poster. This might be my first :P
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@LHartley only if there's no global buckling mode with a lower critical load. If you removed the guy wires, I imagine this truss/frame would begin to buckle globally before any individual member fails.
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Copy/paste, sorry. A few people have asked for variables like that so hopefully in future.
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I see these error messages start to look useless when they say something's not allowed but it still works. Maybe it should explain the reasons too. Nonetheless, I still wouldn't use *TIE on shells because you never know if it's quietly over-stiffeni…
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@disla > I'm obtaining a different result each time I press the run button and only after 5-10 runs a credible result pup up which by the way only fits my expected result if I keep the second buckling factor. Would you be able to send me that …
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You can usually use the elastic option instead of *TIE. It works on shells. *TIE kind of works sometimes but it's unreliable and I'm not sure what all the failure modes are. Nonlinear analysis not converging is usually because of unconstrained rig…
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When I suggested node-surface contact, I meant just using that to make the surface rigid, not to connect it to anything - you can use one of the surface nodes or some other unused node as the reference node. If you really don't want to mesh the fla…
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No, sorry. I'm not sure it would be safe to do that automatically since Mecway doesn't know how much of the contact area will actually be connected before solving. If you could use the internal solver, you might make point connections with line2 fi…
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No. You have to use a mesh of the surface. But it can be a single solid element if it's rigid. You can make it rigid with node-surface coupling or use high Young's modulus.
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It sounds like a poor quality mesh but such elements are supposed to be indicated with a red "X" visible in wireframe view. Do they show that? If not, could you please send me the file to investigate why they're not being detected?
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In the DC current solution, you can use Solution -> Volume integral to integrate power density.
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You can make these settings in Analysis settings: Analysis type: Buckling Modes: 3 or whatever Shift point: 1 seems to be OK. It should be lower than the lowest buckling factor but not too many orders of magnitude lower or the error increases. Bewa…
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Mesh the plate and use contact with the CCX solver and Nonlinear Static 3D. If the plate is effectively rigid, you can use a very coarse mesh, like one huge element.
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Just a guess but your 3rd picture looks like it might be a symmetry boundary. Be aware that symmetry for DC current flow is the default when no boundary conditions are applied so maybe you can remove something from there??
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That happens when other constraints share the bonded contact's slave nodes. Those could be fixed electric potentials or other bonded contacts. A workaround is to extrude a thin layer from some surfaces and exclude the thin edge of that from one of t…
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There isn't a way to create a von Mises stress with the proper calculated values through a script without solving it again. You can add the Zienkiewicz-Zhu von Mises stress item to the outline tree with wrong values using solution.set_variable("zz…
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@jaros No non-commercial price anymore, sorry.
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@German It's according to Three-Dimensional Static and Dynamic Analysis of Structures A Physical Approach With Emphasis on Earthquake Engineering, 3rd edition, by Edward L. Wilson, Chapter 6. Incompatible elements.
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Not really. CalculiX has a 1-DOF spring (SPRING1 element) which you could define manually but that's probably even less convenient. You can create line elements by extruding from nodes, and could generate all 8 isolators together with 2 extrude ope…
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Not picking nodes in Mecway is because the OpenRadioss stresses/etc. are only on elements, not nodes. I intend to apply node averaging in Mecway so it has both.
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@Tao, I've heard of this same problem from one other person before. Did you experience it with previous versions too?
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I'm not able to reproduce this problem with a 262000 element model. Perhaps you could send it to me privately? That error message is supposed to show if you modify the node numbers near the top of the form to something that's invalid, like a non-ex…
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Other than Gmsh/Salome as Sergio suggested, since it's just a prismatic extrusion, you can do a surface mesh, delete all but one end surface, then extrude to a solid in Mecway. That will give you a hex-dominant mesh that's structured in one directio…
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@Fatmac Thanks for that Altair Study Guide. It's easier to read than the user guide and more helpful about recommended element options. The fixed format does take getting used to. But there's also a lot of consistency so it gets easier. Here's an …
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Hello Bruce The tube mesh you showed is likely too coarse being made from tet elements (automesher). Other ways to mesh it that will probably give better results and/or fewer nodes are: - Make a surface mesh then delete all except the inner or out…
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Previous versions would all co-exist by default but now (26+), it automatically uninstalls the old one (25+) retaining its settings and file associations. You can copy 25 to somewhere else before installing 26.
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@Sergio The void material (/MAT/LAW0) stays put on its own. Another way is /BCS for fixed displacement boundary conditions.
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Oh yes, OMP_NUM_THREADS for multithreading.
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You can do but I'd put them somewhere else then set their location as in your picture. If you change anything in the installation folder, it can get messy if you uninstall or update.
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Yes. You can do this: 1. Select the surface faces 2. Create a new node-surface coupling. The surface will automatically be assigned. 3. Select the reference node. 4. Edit the node-surface coupling. The selected node will be automatically assigned to…
