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There is something weird on your rotation symbol ¿isn't it?. Do you have the beam correctly oriented ? Your picture shows constrain in the W direction which is the right one but it looks pointing upwards. If you are getting the right analytical val…
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You could also use the Deleted unused nodes in Mesh tools.
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Hi, You probably have some shell or beam element in your model. If yes, add a modify Keyword *NODE FILE --->OUTPUT 2D. Then proceed as normal. I have tried with creating a table, copy into notepad to remove the spaces, and paste it back to mecw…
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Hi and welcome, To allow the rotation on a beam you could also proceed as this: Activate the thickness of the beam to see its shape. Select its surface on the extreme like in the picture. Apply to that surface a flexible joint on beam Boundary co…
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@prop_design The main issue is probably me writing too much. I'm trying to understand why Rigid Body is not working as expected for me with shells and beams. Some behaviours seem random but now I understand what is going on much better and I will…
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@Victor. The file ROT NODE VISIBLE shows clear that the Rot Node is moving when the user only wants a displacement of a Rigid Free Body. That's from my point of view something weird. ROT NODE can not move if the user do not request it or the surro…
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Another example that I have convert to Shell element. Try to solve the rigid body motion without constraining the Rotations of the reference nodes. It finishes that it is not a rigid body. @prop_design you can see in the picture I'm getting 4951mm…
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A rigid body should not deform and end further than the imposed displacement value. I would understand some rotation maybe but not distortion. ¿Is there any way to check if the ROT Node coordinates have change since it was originally created by …
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HI Victor, Ok. Let's consider I forget about ROT NODE for a while. We don't talk about it, and I never meet him. I don't know about the custom model definition option. If I introduce three displacements into the Mecway Reference node of a Node-Surf…
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The strange-seeming interdependencies are not so strange if you have into consideration that any rotation promoted by the ROT NODE on the RIGID BODY is done around the REF NODE as CENTRE of the rotation. That's why the position of the ref node , mak…
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"Mecway quietly moves rotational loads and constraints on the exposed reference node to the hidden ROT NODE behind your back". ¿Is that right?. That is exactly what I’m exposing. I thought that was happening because the ROT NODE end up in the bod…
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I just realized that this is not only in RIGID BODY. As MECWAY noticed and warn, displacement BC on shells and beams sometimes causses incorrect stresses in ccx. This issue is the same, it is related and can be fixed the same way. If BC's are i…
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This is an example of rigid body working in Static 3D applied to Shells and Beams (respecting the above points).
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@Prop_Desig Don’t know Prop_Design. Maybe it is due to the mesh but a function defined with parameters or its equivalent piecewise function by means of user curve definition should give the same results.
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It might be related with the difference between : *DISTRIBUTING COUPLING (force or displacement) and *COUPLING *DISTRIBUTING (*DISTRIBUTING preceded by a *COUPLING ). No kinematic relations are created between the reference node and the coup…
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Thanks, Kenn, Regarding the speed up of the computational process with BC applied to the nodes I mean applied to the nodes directly instead of applying to the surface where they belong. I think that when it is applied to the surface the solver need…
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Hi Kenneth, I commented on the "Nonlinear Axisymmetric Post" that I noticed that when imposing the BC,s directly to the nodes, the assembly of the matrices and computation is much faster. Don’t know exactly why. The difference is big. I have also l…
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Excellent paper. Thanks for sharing. I would add this extract from the Calculix Forum. Xyont: https://calculix.discourse.group/t/elasto-plastic-bending-elements-accuracy/700/12 "hi, beam & shell element are expanding to solid element in Cal…
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I have just notice that displacement is not working eigther in Distributing.liml The deformation shown is due to the self weight. ¿Is the *BOUNDARY card allowed for node-Surface distributing coupling ? It is shown in the manual but seems can not …
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It is set up in static analysis and it works ¿?¿ . In nonlinear it fails if you try to go more than 20% plastic strain. The above study case we are reaching between 45% - 50%.
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I will post in new subject to not contaminate the Improvement suggestions.
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This is a 3 min run very raw just valid to check contacts and estimate parameters. https://we.tl/t-CAhFphCTiJ
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Hi I would solve one of the bolts with its contacts first (master/slave, stiffness values, tie or elastic,...) Once it works, then i would go to the full model with more confidence and not wasting computational time. I have done a quick first run a…
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There are many things going on there. I would split the problem and proceed by steps. I would suggest you try to find a convergent solution first with linear elements on a reduced model (See pic). It contains most of the details to be solved and ea…
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Hi Victor, Thanks for the interest. What I’m mostly interested is the capability of the surface to follow the REF node and deform at the same time. Without some Dynamics I do not think there is much difference with actions “directly” applied on t…
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Try to install Gmsh and link it with MECWAY. Regarding Netgen, I normally set the elements per curve and elements per edge to 0.01. I saw it a long time ago in a post at this forum and it has a lot of sense. If you have two sides of different leng…
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Reading this is comforting. Well, I think then that I will stop at least for now. Let me know if you make any progress. It has been a very good exercise. I feel more confident now. Regarding the material databases, I'm sorry I can't help. I basic…
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Hi Ken, My model don’t converge with the Ramberg-Osgood parameters and I can’t find why. It works with the ISOTROPIC HARDENING CURVE including friction. Strain values are close to the Abaqus results but when entering Ramberg in material it fails. ¿…
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I don't have any issue ?¿? Just some elements of difference. (Netgen 6).
