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Ansys Fatigue in Workbench

Ansys Fatigue in Workbench

Ansys Fatigue in Workbench

(OP)
Hi all can anyone help

when doing a fatigue safety factor in Ansys WB 13

it would seem anything above 1x106 cycles doesnt change

the fatigue safey factor.

ie i have just set up the same analysis with 1x109 cycles

and 1x106 cycles and the SF doesnt change it only changes

when you get below 1x106 cycles a little confusing

can anyone help

Thanks

Stu

RE: Ansys Fatigue in Workbench

This is not really a question about ANSYS.  You should read up on fatigue before dong a fatigue analysis.  Specific to your question, you should read about endurance limits, then determine if they are applicable to your specific material.  

RE: Ansys Fatigue in Workbench

(OP)
Thanks

but it is about ansys, the material is carbon steel
and i have found my answer


"In a constant amplitude analysis, if the alternating stress is lower than the lowest alternating stress defined in the S-N curve, the life at that point will be used."

Hence the stresses in my analysis were very low but it does give
confusing results if you dont know the above

Stu

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