Is there any perfomance difference or advantage when solving a static analysis that is based on a multi-body part versus the same but of an assembly?
shouldn't be. what are you seeing?
i use a lot of multibody parts since we build assemblies/part specifically for analysis.
the only disadvantage is that sometimes it is harder to select bodies to apply things to and you can't explode a multibody at the assy level so visualization can become challenging.
I am still a newbie with simulation and I am trying to figure out a way to speed up an analysis. Figured maybe an assembly saved as a part might be more efficient. Seems to not matter as you mentioned. Also, there's no way with a multi-body part, to automatically find contact sets.
when you say "speed up" do you mean the solve time? or assembly performance in general?
regarding the second part, if 2 bodies are touching, automatic (global) bonding will apply. and contact set search should work.
If define contact sets even though there is global bonding, will I be adding extra computational time when it is not needed?
as long as you aren't overriding global bonded with no penetration, you should be ok. allow penetration you might be able to save some solve time. if you're overiding bonded with bonded, there might be a small over head just because the methods are slightly different, but it should be pretty close.
i'd be looking at if you can leverage symmetry, different idealizations, if there are simplifications that you can make..etc. to reduce solve time
Here's part of my problem:
I've discovered that the solving time is very long for a series of bolt connections for a connector fastened to an aluminum cover and components. I have 3 of these connectors which have 4 FHMS fastening from the top and 4 PHMS fastening from the bottom. See pic below. I am using a global no penetration and contact sets defined between each - node to surface. The cover is anchored via foundation bolts/virtual floor and the PCB is bonded to the top cover. Any thoughts?
Typo on picture attachment, The second gasket reference from the top is supposed to say "connector flange".
How many bolt connectors? If you need them, no real way around using them.
If you are overriding the global contact with contact sets, why not just keep it bonded? That would tell you immediately if there is an issue doubling them up.
How much faster does it run completely bonded? If your bolts are tight, is that assumption ok for preliminary results?
This is where the problem lies - there are 112 of these bolt connections, 8 each for 14 connectors. Each of these has preloads contributes to internal and external material deformation. My problem is what is the extent of the deformation.
I solve the problem without the bolt connections - used the bolt clamp force on the surfaces where the bolt would mate with the materials and globally bonded contacts but I am not sure how good this solution is.
I was never able to get a solution using the bolt method.
anyway to leverage symmetry and/or simplfiication?
if you want a second opinion, feel free to send me the assembly at firstname.lastname@example.org
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