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Goodman Approach Stress Value

- January 10, 2022 at 9:17 pm
  
  halilkimsesiz
  Subscriber
  
  I have been running a question for fatigue life calculation and calculation of factor of safety. When I try to calculate factor of safety by using Goodman approach, ANSYS take the minimum stress value as zero while calculating stress mean and alternating. But the problem is minimum stress is not zero in this calculations, Could anyone give me a suggestion to get over this situation. Thank you to everyone.
- January 11, 2022 at 4:45 pm
  
  Ashish Khemka
  Forum Moderator
  
  You can change the Loading Type in Fatigue Tool. Please see if the following link is of help to you:
  
  Fatigue Analysis Application (ansys.com)
  
  Regards Ashish Khemka
- January 11, 2022 at 7:17 pm
  
  halilkimsesiz
  Subscriber
  
  First of all thank you very much. Problem is I can't change the loading type because I am running a autofrettage process which is like 670-0-400 (MPA). I choosed the cyclic loading as last step (400Mpa). It is working between 0-400. However, there is a plastical deformation because of first step which makes the minimum stress different then zero. I mean when the pressure is zero the minimum stress is not zero but ANSYS takes it as zero. Is there any solution advice for this situation please?

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