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Victor
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That would pretty much be how to do it currently. Though, writing a mechanical .inp file might lead to a lot of manual changes being needed, so after adding the contact, you can change the analysis type back to thermal so it creates a thermal .inp f…
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Yea re-importing orphaned frd files is something somebody else wanted too to work around a different issue so I might to to add that. No options for show origin and resolution but the next version (v6, beta coming within a couple of weeks hopefull…
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Error codes 1-4 digit error codes without a P in front are from ARPACK when solving large eigenvalue problems. From the ARPACK manual: = 1: Maximum number of iterations taken. All possible eigenvalues of OP has b…
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Changing the temporary folder There's an undocumented setting to change the temporary folder which is used by the solver and mesher. This can be useful if the default drive is full. Edit the configuration file which is located in %localappdata%\…
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Hello Ben. See the sample BeamBendingAndTwisting.liml which is described in the manual (Help menu -> Manual). It produces 4 stresses - one at each of the four corners of the cross-section, and another at a user defined location in the section.
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I'm just studying this more now so beware I'm not too sure of myself... I think you can ignore air over short distances since it doesn't absorb much radiation at typical thermal radiation wavelengths. In a vacuum chamber where there's radiation …
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Yep, it's proportional to those things but Mecway also includes incident radiation from the ambient if you specify an ambient temperature. Normal heat flux out of the surface is Q = σE(T^4 - T0^4) T = temperature of the surface T0 = ambient t…
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Ooh, this is a problem with the software that it allows it to get stuck in that confusing state. What's happened is there's a very large shell offset (20.5 m) on all the shell elements so they're outside the visible range. To correct it, click the n…
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I still don't understand the need for full slider range after setting the max/min. Can you show an example? The example above looks fine without full range, doesn't it?
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Yea TIE is probably more permissive of this kind of thing. In the next version I'll make TIE an easier option by just ticking a box. You probably know this Sergio, but for anyone else, its weakness is that it requires the surfaces to be coincident a…
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Nodes 33 and 34 are slaves of two different bonded contacts which isn't allowed. Also, the constrained nodes at the ends of the beams aren't allowed to be bonded contact slaves at the same time. A workaround is to extrude a small extension at the …
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There's not much error checking of the liml files because it assumes they were written by Mecway or LISA. You can debug it in a general way by deleting parts of the file until the error goes away. Most items are optional except where they're refer…
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VTK support which Sergio suggested recently is probably the next thing I expect to do for results export. For now, if you're using the CCX solver, you can write a batch file to automatically open the output file in CGX after it solves. Your toolti…
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Thanks for those suggestions. The first two I've added to my list but can't promise when. As for the max/min sliders, I don't quite understand what's wrong with the sliders not being at the top and bottom. Is it that sometimes they're so close tog…
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I just noticed the mesh isn't properly connected in some places. Use View->Open cracks to reveal the gaps and Mesh tools -> Merge nearby nodes to correct it.
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I'll have to investigate because it certainly seems like a bug. No idea what's causing it yet.
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Yes but it's difficult so I don't plan to do that.
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When I tried it didn't show any worrying penetration, though there were some strange graphical glitches with transparent elements in the solution. How far was the penetration and on which parts? Be aware that the default deformed view scaling fact…
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The cutting plane slider cuts the front off by moving the plane into the screen regardless of how the model is oriented. I suppose it would be more sensible if once you started using it, it locked its direction to the model. The loads do include a…
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I would think so. That sounds even easier.
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Not much, though they're much the same as constraint equations in other software. You can use them to distribute forces by making the displacement of one node equal to an average of the displacements of two or more other nodes a bit like the linkage…
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Good point. I'll try to move *MATERIAL to after the sets and surfaces. Section cards should already be there. *EXPANSION should be written for isotropic materials in axisymmetric but only if there's also a thermal stress defined in Mecway. That co…
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Pyramids are currently a problem and I don't know a practical solution sorry. Version 6 will export them as collapsed hex elements which are OK for CCX but it's hard to do that by hand. Correct that convection isn't currently exported but you coul…
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What happens is as you suggested in point 1 - there's a temperature difference across the element and the heat flux is calculated from the nodal temperatures so it ends up being non-zero. This is just discretization error and it would approach zero …
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Not yet sorry. The next version (6) will do this though. For now, you would have to save as .inp then run CCX directly. The save step is still a manual process tough.
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Great idea though it'll be low priority.
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Use a displacement constraint. Typically select the row of nodes along the edge you're constraining then apply it. For shell elements, you can apply it to the edge "face" so that it's retained through mesh refinement.
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Penetration is unavoidable with this type of contact. You just have to reduce it to an acceptable level. Do that by increasing "Slope of pressure-overclosure curve K", perhaps by an order of magnitude at a time until the penetration is acceptable. …
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Here's a slightly simpler and probably more correct way from what I suggested before. It's a single thin element between the beam and the solid. It's joined to each with bonded contact. The bonded contact between the beam and this thin element sprea…
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You don't need to explicitly define conduction since that's the function of the elements that make up the mesh. It's also determined by the thermal conductivity which you can specify as a material property.
