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Example calculation

Rectangular tubes subject inside pressure and external forces

according to TRD 320 and EN 12952-3 § 9.3

Input data

  Outer width of tube B   mm
  Outer height of tube H   mm
  Tube wall thickness S   mm
  Inside corner radius Ri   mm
  Allowable stress Sm   N/mm²
  Inside pressure p   bar
  xyz
  External forces Fxyz   kN
  External moments Mxyz   kN·m
 
 

Stresses after design codes

 

Stress efficiencies

acc. to TRD 320

  at the corner   N/mm²  
  at the middle of side face   N/mm²  

acc. to EN 12952-3 § 9.3

  at the corner   N/mm²  
  at the middle of side face   N/mm²  

acc. to German rules

  at the corner   N/mm²  
 

Analytical calculated stresses

 

Stress efficiencies

membrane

  at the corner   N/mm²  
  at the middle of side face   N/mm²  

membrane+bending

  at the corner   N/mm²  
  at the middle of side face   N/mm²  

Sketchs

   

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