Calculating the hydrostatic pressure on a tube

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SUMMARY

The discussion focuses on calculating hydrostatic pressure for a submarine project involving a perspex tube with specific dimensions: 26mm inside diameter and 30mm outside diameter, designed to submerge to 100m. Key parameters to calculate include deformation (ε), critical pressure (Pc), and the failure mode (buckling vs. compression). Participants recommend using online engineering calculators and provide links to resources such as PetroWiki and Engineers Edge for further assistance.

PREREQUISITES
  • Understanding of hydrostatic pressure principles
  • Familiarity with material properties, specifically for perspex (E = 1.3 GPa)
  • Knowledge of deformation and buckling concepts in structural engineering
  • Basic skills in using online engineering calculators
NEXT STEPS
  • Research the derivation of formulas for deformation (ε) in cylindrical tubes
  • Study critical pressure (Pc) calculations for thin-walled tubes
  • Learn about buckling analysis for cylindrical structures
  • Explore online engineering calculators specifically for pressure vessel design
USEFUL FOR

Engineers, particularly those involved in submarine design, structural analysis, and anyone interested in pressure vessel calculations will benefit from this discussion.

Orben24
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Hey guys.
I'm working on a submarine project and my goal is submerging it to 100m, but I'm having trouble calculating the parameters i need.
I'm working with a perspex tube (E is about 1.3Gpa), 26mm inside diameter and 30mm outside diameter. the tube X meters long with inside pressure of 1 atm.

I'd be happy if you guys could direct me to the right formulas (and how to derive them) for the deformation (ε), the critical pressure (Pc) and would it fail from buckling or by compression.

Thanks for the help! very much :)
 
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