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Stress Concentrations and Fatigue

Question asked by 1-JKJ62I on Aug 13, 2009
Latest reply on Aug 21, 2009 by Jose Eduardo Fernandes de Camargo



I was hoping that someone could please help me out with a fatigue issue.


I am designing a 6082-T6 aluminum part that will be cyclically loaded.  After running FEA, it has a very high stress concentration in a small round.  To avoid any fatigue failures do I need to make sure that the stress concentration is below the aluminum fatigue limit?  Also, is there a general safety factor that is used with the fatigue limit to determine an allowable stress at the stress concentration area?  I would like to design for at least 10 million cycles. 


Thank you very much for your help, I appreciate it.