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Example calculation

Analysis for cyclic loading

according to AD 2000-Merkblatt S2 (October 2004)

Input data

          Time point 1   Time point 2    
  Stress components   σx       N/mm²
σy       N/mm²
σz       N/mm²
τxy       N/mm²
τyz       N/mm²
τzx       N/mm²
  Maximum cycle temperature   T       °C
  Yield strength   Rp0.2     N/mm²
  Tensile strength at room temperature   Rm20     N/mm²
  Material group          
  Loadings type          
  Surface roughness   Rz     µm
  Actual wall thickness   s     mm
  Component welding class      
  Fatique notch proof      
  Vessel longitudial or circumferential weld      
  Ground flushed and 100% tested weld      
  Stress relieved      
  Stresses are evaluated from strains      
  Calculation theory      
  Cyclic load collective      
 
 

Results

  Permissible load cycles number   Nall      
 

Additional results

  Decisive calculation temperature   T*     °C
  Yield strength at T*   Rp0.2/T*     N/mm²
  Reference stress amplitude   va     N/mm²
  Surface influence factor   fo      
  Wall thickness influence factor   fd      
  Mean stress influence factor   fM      
  Temperature influence factor   fT*      
  ke/v– factor   ke/v      
  Maßgebende va   va*     N/mm²
  Stress range   a*     N/mm²

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