Stress Determination in thin wall cylinder

AI Thread Summary
To calculate the stress in a thin-walled cylinder storing water, the formula stress = pd/2t can be used, applying the water pressure at the specific depth. This method is valid for vertical axis storage tanks filled with still water. However, if the cylinder is inclined, the same equation may not apply directly due to variations in stress distribution. Additionally, when analyzing structures like silos that experience both pressure and frictional forces, it's important to consider how these forces interact with the stress calculations. Overall, while the thin-walled pressure vessel formula provides a good approximation, it may not capture the complete stress variation with depth.
scootypuffsnr
Messages
13
Reaction score
0
hi, i was wondering if a thin walled cylinder was storing water, where the pressure is dependent on the depth of water, how would you calculate the stress in the wall at some depth,
eg are you allowed to use the thin walled pressure vessel stress formula: stress = pd/2t and use the water pressure at that depth?

Thank you
 
Engineering news on Phys.org
Yes that's ok for a vertical axis storage tank holding still water .
 
Last edited:
thank you so much for the reply,
what do you mean for the vertical axis? if the cylinder was inclined at the bottom of the cylinder would you not be able to apply the same equation
and also do you know how would you include frictional forces if it was acting at the same time in the stress calculations
 
I don't understand where your frictional forces have come from .

Describe what you are doing in more detail and/or send a diagram ?
 
im actually analyzing a silo structure storing bulk material to analyze the stress concentrations near the bolt holes so it would have pressures and frictional forces on the walls but just thought cylinder with water would be easier to describe
 
scootypuffsnr said:
hi, i was wondering if a thin walled cylinder was storing water, where the pressure is dependent on the depth of water, how would you calculate the stress in the wall at some depth,
eg are you allowed to use the thin walled pressure vessel stress formula: stress = pd/2t and use the water pressure at that depth?

Thank you
This would be a very good approximation but it would not be exact because of the variation of stress (and hoop strain) with depth.

Chet
 
Hi all, i have some questions about the tesla turbine: is a tesla turbine more efficient than a steam engine or a stirling engine ? about the discs of the tesla turbine warping because of the high speed rotations; does running the engine on a lower speed solve that or will the discs warp anyway after time ? what is the difference in efficiency between the tesla turbine running at high speed and running it at a lower speed ( as fast as possible but low enough to not warp de discs) and: i...
Thread 'Where is my curb stop?'
My water meter is submerged under water for about 95% of the year. Today I took a photograph of the inside of my water meter box because today is one of the rare days that my water meter is not submerged in water. Here is the photograph that I took of my water meter with the cover on: Here is a photograph I took of my water meter with the cover off: I edited the photograph to draw a red circle around a knob on my water meter. Is that knob that I drew a red circle around my meter...
Back
Top