Fatigue in Abaqus

[bm92]

I'm hoping there's someone here who can give me a little help. So I've run a large number of fatigue tests, both stress and strain controlled, and using the data from these I've calibrated material constants for the chaboche model in Abaqus and run the simulations getting fairly similar results.

What I want to do now is determine the high cycle fatigue life (strain energy approach) of the material and compare it to available data. My main problem is choosing appropriate fatigue models and then calculating them. I was looking at the following models

I know I need to look at the strain energy density output in Abaqus and need to post process the results some how (maybe a script in matlab). How do I take the abaqus output and get it in a form where I can determine fatigue life using the above equations?

Any help or guidance would be appreciated, I've been scouring the internet but can't find any info on it.

 

[Mustaine3]

Fatigue codes often use C++ or Python to add their output into the odb or to create a new odb. That allows to use all postprocessors that support the odb for visualization.

Edit: And for sure - with these two languages it is also possible to read data from the odb.

 

[IceBreakerSours]

Python scripting. Pick up a good book or visit a good website, become comfortable with Python, open an .RPY file, and go through the Scripting User's Guide available in the documentation.

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