Can any one help me to do waterproof test of a model. PFA Model image.
Solidworks User Simulation
It's possible to set up a simulation with all the parts in contact and with a positive pressure on the outside. If the model is clean this would not take very much time.
Are the dark parts rubber gaskets? With good contact analysis you can put in pre-load from the fasteners and see sealing pressure on the rubber. Though I'm not certain what happens when bolt pre-load is 'used up' (i.e. tension in a fastener is lost) and a non-linear material model might be necessary for the rubber.
Can you provide the least bit of detail about what we're looking at?
I'm guessing that it contains pressure inside the semi-transparent parts. Or is it that backwards - does it keep pressurized fluid out?
Yes it going to be placed in the water so it'll pressurized outside.
As this is an assembly I just want to know the weak points and what will be the maximum pressure.
Thank you so much for the answer shawn.
I went ahead and set this up, thinking it would be a fun two minute job. It was a little more involved, but still not bad.
Built a simple model with one cap and six screws. Set it up in half symmetry.
Forgot to restrain anything at first, ended up fixing one point, all axes, and a point on the other end, in-plane. Combined with the symmetry condition this constrains the part.
A large friction value is needed for the rubber gasket contacts, or it will be pushed into the cavity.
Meshed to ensure two solid elements across every wall.
With all the contact it took 14 minutes to run this relatively small model on a fast quad-core system.
Thank you very much for your effort shawn.
If I'm using the o ring then I can go with the shrink fit right?
Yes the shrink fit contact is what I used here where my gasket fit inside the cylinder. I modeled it with an initial interference of about .030" (over a 3" diameter).
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