Hoop Stress for 'inner tube-type' design
Hoop Stress for 'inner tube-type' design
(OP)
I need help setting up COSMOS for a inflated tube. It's simple enough to use the equation: ?=PD/2t . But I wanna use COSMOS, and it doesn't want to work right.
P= 80psi
D=10.22 (though I'm unsure this is the nominal diameter)
t=thickness of tube
(Or is it this simple?)
P= 80psi
D=10.22 (though I'm unsure this is the nominal diameter)
t=thickness of tube
(Or is it this simple?)






RE: Hoop Stress for 'inner tube-type' design
Is this like a pipe inner tube / liner (i.e. linear) or like a tyre inner tube (i.e. circular)?
Can you advise on what you want to achieve as there maybe alternatives ways to doing this?
Any particular reason you want to use COSMOS over classical methods for what appears to be a simple problem.
RE: Hoop Stress for 'inner tube-type' design
-It's like a tire inner tube - you're from England, aren't you?
RE: Hoop Stress for 'inner tube-type' design
I guess your modelling the inner tube alone with a pressure on the inside and no outer wall support from the tire etc and if you apply a constraint to the model it doesn't work correctly and if you don't apply any constraint then you get messages something like it is under constrained and static analysis failure?
If this is the case then if you apply weak springs then you can get it to work. You need to take a bit of care with the results as you are constraining the model and verify it but I tried doing this and the results are within a reasonable degree of accuracy.
If this is not the case if you let me know how you are constraining the model.
RE: Hoop Stress for 'inner tube-type' design
RE: Hoop Stress for 'inner tube-type' design
corus