The "best" way to simulate a bolt depends on the goals of the analysis; what are the goals of the analysis? What do you need to simulate? I emphasize need because you rarely need to simulate the exact nature of a bolt.
"I worry a little bit, because I see a deformation where the bolt head sit. And as
I understand there not supposed to be deformation where the bolt head touch the
Can you explain this a little further? What do you mean by, "deformation where the bolt head sits?" In a real world bolt connect, the material around the bot head can move; in a SW Simulation idealized bolt head, this is not the case because the software is using rigid links to connect the meshed geometry to the beam element representing the bolt.
Thanks shaun for your answer
Well I trying to simulate what happened to a bonnet, (a part of a water valve ) with a pressure of 125 bar inside it
The bonnet connect to a diaphragm anda body.
my goal is not what happened to the bolt . my goal is to see what happened to the bonnet.
If you think there is a better way to make the connection between the bonnet the diaphragm and the body
I will be happy to hear
run the analysis on the bonnet only with it restrained where it is bolted and connects to the other parts. that is the only other option.
but i'm still not sure i understand what displacement you are talking about. could you point it out in your document?
1. I didn’t know if I have to put bolt connection , or there is other way to connect
between the body the diaphragm and the bonnet only with fixture and which type
I put here a link form YouTube movie from inovia system that show the best way to
simulate bolt connection with 2-3 fixture could you please can take a look at that movie and to tell me if
the this is the right way? Advanced Fixtures in SolidWorks Simulation - YouTube
2. when I put bolt connection in my study, is the bolt simulate all the fixture that
a bolt connection should simulate like no displacement in the z direction (the plane where the head of the bolt sit should
not move up as I understand)
you could use fixtures if you don't need to hold 2 parts together like they do in that example. fixtures hold things with respect to the environment.
if you need to hold 2 parts together, use bolts. check the tutorials for an example. i'm sure there are also youtube videos on using bolts as well
I am not sure I understand your question (can you attach the assembly here), but I'm thinking you might not need the fastener included in the analysis, but rather, Split the face where the fastener face would come in contact and add a Fixed constraint to that split area.