Thank you for the link. Unfortunately, this tutorial does not include any pressure load. However, i did look at some other O ring studies like this one :
https://www.youtube.com/watch?v=QzXy6PhBs6U
https://tarkka.co/2019/04/11/overview-of-hyperelastic-fea-of-o-ring/
It uses what is called a fluid pressure penetration load. It is a pressure that spread from defined start points, unless contact is active. Some documentation exist in the "contact technology guide"
It can be applied by using the APDL command SFE. I am using this snippet to apply the load on the surface (named selection "pressure") from the start points (in named selection "StartPoints") :
kbc,0 ! I want this pressure to be ramped
cmsel,s,Pressure
esln,s,1
esel,r,type,,cid_1
sfe,all,1,pres,,6e5
ALLSEL
cmsel,s,StartPoint
esln
csel,r,type,cid_1
sfe,all,2,pres,,6e5
ALLSEL
On overall it is working neatly. One problem remains : My flexible body has some self contact (not shown in the previous figures). It is defined separately from the contact with the other body. Fluid pressure start from this self contact although it is not specified as a starting point. I will update this post if I find the answer.
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