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First step - will change the rotation of the L members but I have another question. Should I set it to 0 or 90? Angle normally would be +/-45º , +/-135º. It aligns the flanges with the Cartesian planes. If you show the beam thickness you can see …
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Hi LHartley , -You have all the members specified as truss; columns included. ¿Is that ok with you? -L members have their V axis naturally rotated 45 degrees. That makes you are losing strength capacity of the members and it will be difficult to …
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The offset card allows to build custom beams in ccx extending considerably the available sections. I have tested with a custom build IPE160 but I don’t really think it is worth the effort unless one builds a library or needs a specific custom profil…
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Hi, I must correct my previous post. There is a way to offset beams when using the ccx solver and adjust stiffeners positions. I requires custom cards but it is not complex. First go to the Element Properties in the Mesh Tools menu and set the pr…
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Confronting ideas politely is always worth. I would like to use the result of this discussion as example to encourage more users to participate in the forum. The fruits are already beginning to be seen. Eight revolutions in Total CalculiX Time: 16.6…
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Thanks Victor, I’m working on that old problem with pure shells and large rigid body rotations, and I have already identified two issues. The first is related with the shell losing its axis of rotation. That’s fixed and was caused by a wrong unders…
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Hi, Now that we have this wonderful shell elements and that their usage will probably be extended more and more, would be nice if the edge detecting selection tool could be extended also to the shell faces as it works on solids. Not sure if it was …
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Hi, After a long debate, Victor has helped me to identify the origin of the discrepancy between my results and MECWAY. It has turned out that the starting hypotheses in the statement of my post was wrong. Precisely the one "displacement of 1mm in …
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That’s really impressive. Beauuuuuutiful mesh. I am a big fan of manual meshing and MECWAY is very strong in this sense. Congratulations to you and of course Victor for the new release. We have a gem on our hands.
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@Victor "Oh, I see what you mean now about "if I eliminate the Orientation card in the three my custom model fails". That's because the custom CCX cards refer to an ELSET (element_orientation_elements) that the orientation card creates" The Orien…
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I would better like to find the way to impose an arbitrary displacement on beams without having to decompose the vector. I guess now the question is ¿why it works when it is imposed only in one cartesian coordinate without showing let’s call it free…
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Hi, Victor and Thanks for your reply, Thats ok for 1 Beam but we couldn't solve the attached file as it would over constrain the model. The most general case is important as it involves dandelions (spiders). I think my method could solve it corre…
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Hi, The Coordinate system shown in Figure 153 has been removed from the ccx Manual 2.20. I think it is not said but the vector from beam to b point must be orthogonal to the beam and pass through the point a. I have tried other combinations that re…
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HI, This is OPTION 3 using the rectangular coordinate sistem (as MECWAY likes) that seems to work too. I’m using a *TRANSFORM TYPE=R (rectangular) custom made and built directly from the beam direction. For direction (1,1,1) it is (-1,1,0) I woul…
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¿Is it still possible to switch between Paradiso and Pastix? I experienced issues with mixed precision and nonlinear analysis too. I compiled the MKL Pardiso with out of core provided within the ccx folder in the last Mecway distribution and I don't…
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Sure.
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Here you can see why it was not working. Connection between a beam and a shell is rigid although they both have rotational degrees of freedom. When connected to the through thickness shell side , it don’t allow that section to rotate properly during…
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Hi cwharpe, Good news for your Dandelion. If you use Springs instead of beams , the square plate with hole delivers exactly the same result as Rigid body. The picture shows Node Surface Coupling RIGID against Dandelion using Beams , using Trus…
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Hi cwharpe, Sergio Well done and thanks for sharing!!. I can see you managed to find the way to get it work. As these spiders are new to me , I have been doing some readings and tests and if I understood it correctly literature differentiate betwe…
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Thank you very much Manuel !! , That’s the first approach to seismic analysis in the time domain I see with Mecway and could be very useful to me too. ¿May I ask you some questions if you don’t mind? -¿Is this method able to capture any possible…
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Hi, Cwharpe, Not sure if this is the same as a spider beam (new to me) but If it is, it could be done "easily" and maybe could be translated into your API function. Unfortunately, I’m very bad programing and I can’t help in that sense. It is based…
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Hi, Victor, I think I see what happens. You fixed the custom refinement adding a merge operation as some of the middle nodes disconnect in previous versions. Now , when merging, there is this particular case when two elements that are going to be r…
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Running the model just opened the plates separate as they are not attached in any means. After a Custom refinement 2,2,1, the nodes between plates are merged and the solution gives cero displacement . Additionally, internal solver shows a warning.:…
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Hi dperk492, I think there is no tolerance adjustment parameter to adjust convergence. ¿Could you post the file or a simplified version to see if we can help? I have found the compression only support can be difficult sometimes.
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HI Tim, Select the lip nodes, change the selection to edges, and extrude as usual but just one subdivision. Then collapse (*) this short shell ring. (*)Collapse means to reduce the element dimension by one. Volume to shell, shell to line or line …
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Thanks Sergio. I would say it's new. ccx beams where just the rectangular shape isn't it. Hallow tube doesn't work to me for this particular model.
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Thanks Manuel. @Victor, this version has internal solver and all the same elements as the original file but for some reason I can't see, it doesn't work on the full bolt model. I fixed the problem why the internal solver didn’t work. The projectio…
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Hi, Victor, The internal solver can set up a bonded contact between a beam and a solid or a beam and a Shell at an intermediate node, the same as we have in this bolt. See file. I think the main issue is that pretension, forces to convert the beam …
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There are two options available in Calculix. 7.129 *UNCOUPLED TEMPERATURE-DISPLACEMENT step - thermal and mechanical analyses are solved sequentially - thermal simulation is followed by mechanical one in each increment and thus there’s no feedba…
