Reply To: Problems with fatigue calculations

[javat33489]

Hello, how do the element stress results compare to the S-N curve? Do the elements showing low fatigue life have higher stresses/high damage ratio?

 

- Sir, I have modified and simplified the SN curve for the test in this way, from the tensile strength of the material:

 

Mises stress:

 

 

*CONTROL_TERMINATION, also see texpo parameter

- Sir, there is no such parameter

 

 

Regarding your question 3, expected fatigue cycles are computed as “expected fatigue life” times “zero-crossing frequency with positive slope”. For d3ftg generated in a time domain fatigue analysis, only cumulative damage ratio and expected fatigue life are provided. There is no “zero-crossing frequency” so no “expected fatigue cycle” is provided.

 

- I understand sir, there will be no cycles. How then can I check the load, for example, for a task I will drill 10 mm, but I need to check the strength at 1000, how can I scale this? what maps or settings?

 

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PS

 

Maybe I can upload a K-file here? Can you watch it?