ansys - contact for simulation seal

[Jacopo93]

Good evening to all boys,
I wanted to ask you some advice to prepare a calculation:

what is the most suitable contact in ansys to simulate the behaviour of two flanges connecting pressure tubes? that, in other words, guarantee a stagnation.

thanks in advance

 

[lucadileta]

Good evening to all boys,
I wanted to ask you some advice to prepare a calculation:

what is the most suitable contact in ansys to simulate the behaviour of two flanges connecting pressure tubes? that, in other words, guarantee a stagnation.

thanks in advance

hello jacopo, by itself stagna does not mean anything. the seal is defined according to the liquid or gas and according to a certain operating pressure. In most cases, a "bonded" contact is sufficient to simulate the joint of two flanges in an approximate manner, but for a simulation that includes a seal and, for example, bolts, it is not good. depends on what level you have to study the problem and especially with what purpose.

 

[Jacopo93]

hello jacopo, by itself stagna does not mean anything. the seal is defined according to the liquid or gas and according to a certain operating pressure. In most cases, a "bonded" contact is sufficient to simulate the joint of two flanges in an approximate manner, but for a simulation that includes a seal and, for example, bolts, it is not good. depends on what level you have to study the problem and especially with what purpose.

Thank you very much for the answer.

This is a thermomechanical analysis in which I have to go to evaluate the effect of thermal gradients and loads agents on the flange and verify its seal.

I thought to check the seal by evaluating whether the compression status associated with the bolting remains such even with the action of all the loads (p internal, p external, delta t, m stinging). as contact I thought about the frictional.

Thank you very much

 

[lucadileta]

Thank you very much for the answer.

This is a thermomechanical analysis in which I have to go to evaluate the effect of thermal gradients and loads agents on the flange and verify its seal.

I thought to check the seal by evaluating whether the compression status associated with the bolting remains such even with the action of all the loads (p internal, p external, delta t, m stinging). as contact I thought about the frictional.

Thank you very much

hi jacopo, in this case therefore it seems to me to understand that the analysis is precisely in depth on the flanged connection. sure then with the frictional contact you will have a representation closer to reality. when you do the analysis you will see yourself however as the pressure cone generated by bolts will be limited to a relatively narrow radial area so you will realize that the modeling of the seal will be much more important than the bolted connection itself. Maybe if you put something more detailed I can understand something more.

This video could help you.
https://vimeo.com/126995717

 

[Jacopo93]

thanks for the suggestion.

I have to study a flange of a pipe. with pressure gas, constant internal and external, with external insulation. I have to assess the effects on the flange.

 

[lucadileta]

ok, the problem is relatively simple, if you need help ask as well.

Hi.