Recently I spent a whole day getting mad with the partition tool of Salome 5.1.3. NETGEN is not able to mesh a simple square face, if there is a "open ended" partition within the face. If the partition cuts the entire face, there is no problem.
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| Partition bug in Salome 5.1.3 |
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| Partition the entire face works in Salome 5.1.3 |
Since I need to model a lot of weld seams, I cant partition every face through the entire machine. I would end up with a very strange chess board.
Fortunately this bug is fixed in Salome 5.1.4. The partition tool works great with half cut faces.
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| Partition with Salome 5.1.4 |
Because Salome Meca 2010 includes version 5.1.3 of Salome, maybe someone else encounters this problem. So just switch to Salome 5.1.4 (and of course there are some other great features too).
Since you mentioned Weld seams,and that you have to work with a lot of them. Is there a "simple" model (preferably using shell or plane elements) that can be used for modelling fillet (T) welds for automobile bodies? The model should be accurate as well as computationally inexpensive (there may be thousands of them on the car body).
ReplyDeleteHi, nice to see a comment here.
ReplyDeleteJust like you, our models contain a lot of fillet welds and unfortunately they are very important for the behavior of the structure. (The frames of electrical machines I am working on, are basically welded flat plates.)
In short, we simply model the fillet with shell elements (T), without any additional shells for the welding. All plates are partitioned around the welding (at a distance of 50 - 200mm) and for the calculation of eigenvalues we assign special material and physical properties to that small area (e.g. greater thickness, stiffness, ...)
The thickness of our plates is > 50mm, so the parameters will not fit a car body, but this should be the least "expensive" way to model a welding.
I will try to write a blog post about this next week (I am on vacation right now :))
If you like to discuss this in detail, just contact me via this site or twitter.