Changing pressure BC during solution based on contact region, is it possible?

[assafwei]

Hi,

I want to simulate the deformation of a hyperelastic seal during vacuum.
The seal sits on a "cage" with ribs (restrictor to prevent the seal from collapsing into the vacuum chamber) and a sealing surface, I want to understand how will the seal deform in order to see if I need to change the cage and restrictor to prevent the seal from collapsing into the hole it is supposed to seal.
Since the area on which the pressure is subjected on the seal during this process changes (depends on the interaction of the seal and the cage / restrictor) I was wondering if there is some way to set the pressure BC such that it will change with the change in contact between the seal and the cage / restrictor.

Thanks.

 

[FEAdesserve]

Hi
The problem you are facing is due to the material model you use. To simulate such problems, you need to use Gasket joint materials.

Regards,
Desserve Engineering

 

[assafwei]

Hi,

Thanks for the reply.
I am not familiar with the gasket material - maybe you can explain how using this material will overcome the change in the area where the pressure is applied to the seal?
Secondly - my seal is not sweepable and is "bulky" (not flat) - I looked at the gasket material help - it seems as if it is only possible to use this material on "flat" bodies.

Thanks.