August 21, 2018 at 6:26 amKumarVaibhavSubscriber
I am simulating a case similar to a cantilever but i am not able to find the FOS using fatigue tool?However i have been able to find the FOS using stress tool.CAN SOMEONE EXPLAIN ME the difference between the two.What is the significance of the two.My geometry shows different regions with FOS marked by colour notations.pls explain
August 21, 2018 at 10:45 amSandeep MedikondaAnsys Employee
Fatigue Safety Factor is a contour plot of the factor of safety with respect to a fatigue failure at a given design life. The maximum Factor of Safety displayed is 15. For Fatigue Safety Factor, values less than one indicates a failure before the design life is reached.
In a Stress Life fatigue analysis, one always needs to query an SN curve to relate the fatigue life to the stress state. Can you confirm if you have this in your Engineering Data because the error is pointing to missing/invalid data?
Safety factor in the stress is a term describing the load carrying capability of a system beyond the expected or actual loads just in that analysis. This is typically calculated based on the Maximum shear stress but there are other options available. So the selected failure theory selected predicts a minimum safety factor of just over 1.
Hope this helps,
October 25, 2018 at 6:45 am
October 25, 2018 at 11:53 ampeteroznewmanSubscriber
In that image, you can see the Toolbox on the left has a Life category and the S-N Curve object has been added to the material, Structural Steel and the data for the curve added.
March 10, 2019 at 6:07 am1KarthiKEYANSubscriber
Hi, u can add it in altenating stress in ur engineering data...it will already present for structural steel as default..check over it..
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