axisymetric loading of a thin cylindrical

[sdravida]

Hello,



I am modeling a thin cylindrical pipe (clamped at both ends) with a
static radial pressure. I am expecting it to bow at the middle of the
length of the pipe (like a barrel). Instead I am getting a maximum
deflection near the two ends of the pipe. What is the possible
explanation for this?



If we cut a section of the pipe and look at the surface it will be just
like a beam fixed at both edges. A uniform load in this case will have
max deflection at the center. Doesn't same analogy apply to the pipe?



many thanks

Ram.

 

[Natewebb]

I cant really understand what you are seeing but it sounds like you are comparing a pressure vessel to a simply supported beam.


The hoop stress in a pressurized cylinder will cause radial expansion, and if the ends are somehow clamped, the radial displacement there should be less, but axial displacement could be greatest at the ends. So make sure what type of displacement you are looking at.

 

[ndk]

For calculating pipe pressure, you should use 2D plane strain model with pressure load.