How to do hand calculations for a rectangular gas tank under internal gas pressure?

- January 23, 2019 at 7:37 am
  
  naveen28
  Subscriber
  
  Hi,
  
  I am performing an static analysis for a closed rectangular gas tank (steel) with 3mm thickness which is exposed to internal gas pressure of 0.08 Mpa.
  
  Gas tank dimensions are 1400 x 950 x 625 (L x H x W). I need to find maximum deformation and stress values.
  
  Please let me know how to perform hand calculations for the above case for validation purpose.
  
  Note: For FEA simplification,I have took symmetry of gas tank through it length and used midsurface (shell elements) in ANSYS.
  
  Thanks,
  
  Naveen
- January 23, 2019 at 9:02 am
  
  sathya
  Subscriber
  
  Hi,
  
  As the formulations for pressure vessels stress(Bending and Membrane) involves numerous factors,I request you to refer ASME section viii Appendix 13 for correct assumptions and formulations.
- January 23, 2019 at 12:09 pm
  
  naveen28
  Subscriber
  
  Hi Sathya,
  
  Thanks for your response. Can you please share any link to refer ASME section viii Appendix 13?
  
  Thanks,
  
  Naveen
- January 29, 2019 at 1:13 am
  
  sathya
  Subscriber
  
  Hope this might help you.
  
  https://www.osti.gov/servlets/purl/6667698/
- January 30, 2019 at 6:33 am
  
  naveen28
  Subscriber
  
  Thank you Sathya.
  
  Whether the calculations metioned in the link is applicable for both small & large deflection theory?
  
  Because in my case, I need to solve through large deflection thoery as the deflection exceeds 0.5*thickness.