Hi,
In my non linear analysis, I use hydrostatic pressures on a rubber element. During the simulation, the rubber moves, and the hydrostatic pressure doesn't change with the nodes new positions. Its value stays the same at each timestep, keeping the value of the rubber's initial position (even if follow displacement is ticked).
Could you help me with that please?
Xavier
Solved! Go to Solution.
Solved by John_Holtz. Go to Solution.
Hello Xavier,
You mention two things here. Value of pressure and the pressure moving as part displaces.
The value of the pressure is controlled by the load curve. If the value is not doing what you expect please check and verify the load curve.
If the direction of the pressure remains at the initial direction and does not adapt to the displacement of the rubber go to the definition dialog of the pressure and check the "Follows Displacement" checkbox.
The load curve gives to the hydrostatic pressure the initial value.
Afterward, the fluid surface point doesn't gives to the hydrostatic pressure the new value at each timestep.
If I am not clear enough, i can send you picture of my problem.
Hi Xavier,
I just did a test, and it appears that the pressure is updating as my body moves. See the attached animation. The length of the pressure arrows change as my part moves, and it comes to an equilibrium at a position that I would expect.
Is your analysis setup for "large displacement" or "small displacement"? This is a setting under the Element Definition for each part.
I do see one problem in the Results environment. You can select a load and inquire on its value, but the window is showing the magnitude as "nan" (meaning that it does not know what the value is). Otherwise, it looks okay to me.
Hi Xaivier,
I should have mentioned that I am using Sim Mech 2017. What version are you using?
In one of your posts, you mentioned that the pressure was not updating. How do you know the pressure value is not changing?
Can you attach an archive of your model? Or at least some images to show what is happening with your model.