friction release

[g.borre]

Hi

i would like to model a pipe with a axial release, function of he internal pressure.

How can I create a bar release definitiion with a friction property?

Thanks

[Rafal.Gaweda]

I guess : Nonlinear function -> Force Displacement type

[g.borre]

I've tried to model a friction property (see attach) but the results are not what I expected.

I've fixed an upper  value of force. In my mind, when the force due to thermal conditions is higher of that limit, the release have to release completely ux and the bar with a fx force = 0.

[g.borre]

the objective is to model a bar release Ux that is activated only when the axial action exceeds a predetermined value .

[Rafal.Gaweda]

Maybe this way:

File with such function attached

[g.borre]

Ok, it works but I don't understand the meaning of the use of "case component". Is a time history analysis like?

when i do the analysis with my RSA I have this error message (see attach).

[Rafal.Gaweda]

Ok, it works but I don't understand the meaning of the use of "case component". Is a time history analysis like?

I have activated saving results for each  iteration in nonlinear settings to see how it works

when i do the analysis with my RSA I have this error message (see attach).

Run buckling calculations and check buckling coefficients.

[Rafal.Gaweda · Accepted solution]

Ignore this warning: critical coeffs are OK.

[g.borre]

thank you.