I believe a lot of persons think these features are important. But how can we make it happen ?-alex- wrote: ↑Tue Feb 09, 2021 8:04 amYou are right, but my comments above were about the current situation (bodies with space between).
Currently if you analyse a multi-solides model with contacts on coïncident slave and master faces (lets say Part_Compound with 2 plates) you will not get expected behavior. Slave and master nodes seem to be fused. I assume that's due to single mesh as said in early posts of this thread. If you want I will send an exemple later, no time right now sorry.
BTW I fully agree with your request in order to allow contacts on multi-bodies meshing with coïncident faces with no space between. Would be a huge enhencement.
*tie constraint for multiple mesh
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Re: *tie constraint for multiple mesh
Re: *tie constraint for multiple mesh
Ah, good question. By coding I assume... but I have no skills about that so...
If I understand correctly there is 2 strategies:
- improve the current algorithm as @ur said
- implement multi-mesh analysis
I would prefer the second strategy, I assume this would be a convenient way to allocate each slave or master face to the suitable meshed body, efficiently in non ambiguous manner.
IIRC @bernd has an experimental multi-mesh FEM in his branch right?
BTW how can we access your multi-mesh branch? Just by compiling it?bernd wrote:ping
Ok, so do you think multi-mesh analysis would ease to know which node belong to the suitable contact face?
Any opinion much appreciated.
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Re: *tie constraint for multiple mesh
Good to hear this. I have been working on some FEM algorithms now and then. So please let me know if I can help.davidosterberg wrote: ↑Wed Feb 10, 2021 9:43 pmAs I tried to say above. I am planning to implement this. Unless somebody else is already working on it of course.
Re: *tie constraint for multiple mesh
I have attached an example in the issue report.
Also in this post
https://forum.freecadweb.org/viewtopic.php?f=18&t=71154
Also in this post
https://forum.freecadweb.org/viewtopic.php?f=18&t=71154