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Example calculation

Circular plate with non-reinforced or edge-reinforced hole

according to Draft DIN 3840

Input data

  Type of hole    
  Outside radius of the plate r1   mm
  Plate thickness hF   mm
  Radius of the hole r0   mm
  Middle radius of bolts circle rt   mm
  Middle radius of gasket rD   mm
  Inside pressure p   bar
  Gasket force FD   kN
  Additional hole force F0 add   kN
  Allowable stress for plate material σall   N/mm²
 
 

Referenced maximum single moments

  due to inside pressure MP   kN·m/m
  due to hole forces MF   kN·m/m
  due to border moment MM   kN·m/m
 

Results

  Maximum stress in the plate σmax   N/mm²
  Minimum required plate thickness hF min   mm
  Warning: The radius of the hole is invalid!
The hole is too small.
  Warning: The radius of the hole is invalid!
The hole is too large.

Sketch

 

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