Oh dear, that failure with the geometry preview is terrible! I'm not sure what's wrong and can't find a workaround yet but I'll fix it for the next release. Sorry for such a frustrating experience.
I'm not seeing any speed difference between comman…
Fantastic writeup and pictures! If it's not too late, I encourage you to run it through the latest version (16) because the shell elements are upgraded to a much more accurate formulation, especially on curved structures like this.
To avoid decomposing the vector, you could use frictionless supports like this. It's not exactly the same since it also adds some rotational constraints though.
"¿why it works when it is imposed only in one cartesian coordinate without showing let’s call it free rigid body motion"
It's some undefined behavior of the matrix solver when its underconstrained. There are no guarantees about what happens to the …
Yes, suppressed should be "acts like it's been deleted" but here's a place where it does have some side effect. It's not ideal and perhaps I'll change it but it doesn't affect the solution so I think it's harmless. Only a problem for hacking the CCX…
You can do that here too, but it's easier because there's no transformation. See attachment. It's not over-constrained because each of the 3 displacement constraints only constrains the displacement in one direction. The 3 together fully constrain t…
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.
I guess it's surpris…
You can do this without any custom CCX cards. I've attached an example to displace the end of the beam 1mm in the longitudinal direction only.
Nonetheless, the following change to your file works for me. It displaces the node in the (-1,1,0) direct…
Thanks for sharing that, @mmartin. Did you find it was necessary to have such small time steps, which are 1/10 of the time resolution of the seismic displacement function? It's taking too long to solve so can you spoil the ending - does the column c…
Oh, I see now. I was somehow looking at the wrong file before. Your explanation does sound like what happened. I'll see about adding a warning in a future version. Fixing it properly will be more difficult than Refine x2 because it has to keep track…
Could you clarify where the problems happen? I don't see any duplicated elements nor the beams merged to the solids or shells when I apply Refine custom to the whole model or to just the shells.
The convergence tolerance for compression-only support is no longer available. It converges when there are 0 changes in contact status at each node.
Compression only support is really a poor-man's contact that I added because the CCX interface wasn…
Indeed a surprisingly simple solution. I didn't know bonded contact works all the way out to the circumference of the end of a beam element. Unfortunately, the internal solver only connects them at the node, so it won't contact the edges of the hole…
That can happen when it fails generating the volume mesh but after generating the surface mesh which it always does first.
With the surface mesh, can you then turn it into solids with Mesh tools -> Automesh 3D? That will also show you any gaps t…
The surface integral tool should work correctly for diffuse radiation because it's really measuring the heat flux inside the elements at the location of the surface where it has a single direction at each point. Heat can't escape the surface in any …
Unfortunately, I can't find the test I used. It was probably a fully closed box with a solid element inside it. I think the problem was the view factor seemed to be wrong - maybe temperature not as I expected? It wasn't a failure to converge.
I probably won't make it configurable. The location is managed by .Net which also does things like transferring settings to updated installs of the software. Microsoft has somehow decided that's where applications should store their settings and I t…
I hope it's really solved. Perhaps the test I did was wrong but it left me with little confidence in the cavity radiation.
You can set orthotropic in the Thermal tab of material properties.
Interpolating is to decouple the number of displayed colors from the number of defined colors. That way, you can change the number of colors, perhaps to reveal detail in a special case, or to highlight a zero-crossing without redefining them all.
A…
If you set the "Number of colors" to 10 but have 20 colors specified, it keeps them distinct.
I understand those other issues and they're on my list for future updates.
Although this is tedious, you can get predictable view orientations using the…
Internal solver doesn't do cavity radiation or automatic time stepping.
1. I can't find the problem with temperature BC and radiation on a shell surface. Could you give me a more specific example? When I try it, it fixes the surface temperature as …