Hello everyone,

I was trying to run a simulation on a convoluted rubber hose supported with steel rings. A negative pressure is acting on the inner surface of the hose, which should ideally lead to the hose buckling. The steel rings, in reality, stabilize the hose during buckling. Hence the simulation would ideally predict and show the difference in the integrity of the hose with and without the steel rings.

The problem, however, is the simulation approach. I want to do the classic "Static structural --> Eigenvalue buckling --> Static structural" approach mentioned in :

https://www.padtinc.com/blog/the-focus/eigenvalue-buckling-and-post-buckling-analysis-in-ansys-mechanical

I am not getting any convergence, naturally, because of the complicated contact conditions between multiple rings and the rubber hose. 

How can I approach this? 

(P.S : The steel rings are attached to the hose just with the help of the hose geometry. No bonding agent in any way.)

 

Convoluted Hose with Rings

 

Regards,

Pari