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Changeable pressure surface issue

Changeable pressure surface issue

Changeable pressure surface issue

(OP)
I am modeling a seal with hyperelastic oring. I've applied a pressure to the oring from the gas side. But under the pressure rubber strongly deforms, so the surface to which the pressure is applied should also change.
My question is: is it possible (and if yes - how?) to apply pressure to changeable surface which takes into account model deformation?

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