Hi Daniele,

if you developed UMAT, then write the damage variable in one of SDV's and visualize it applying the ABAQUS postprocessor. 

Hi Daniele,

If you just need to use S, EE, CE etc. to create new variable, try to use the Create Field Output function in ABAQUS Visualization module.

Or you can use UVARM.

If you want to learn how to use python to perform post processing, read the abaqus.rpt in your working direction (usually it is C:/Temp), that python file will help you a lot. 

Dear Konstantin,

do you refer to a particular Abaqus software package? Because normally I use ABAQUS CAE to pre and post process my data. But I would like to develop something more reliable and versatile, and since now python coding appears the only way to manipulate odbs.

Dear Jingdong I need to post process the SDVs which for example have a different way of calling, for example, they have no components. I will look to that .rpt file anyway thanks for the tip.

PS

In my code, I run the analyses and obtain the response, and I can get the creep and fatigue damage as well using the proper SDVs and Fortran coding. However, due to the numerical procedure, these calculation are done on the converged results, which represent the load cycle steady state response. If I would like to asses that cyclic response using different damage law I have to run again the analysis each time, and this is really time-consuming. For this reason, once I get the steady state response,  I would like to keep the original ODB and perform on it the manipulation by using the python code.

Hi Daniele,

in this case write a python or c++ code: open the odb, read stress/strain tensors and compute damage inside your code. Please note, the opening and reading may take time for large number of elements, so the procedure with UMAT may be efficient as well.

Daniele, 

I had a similar problem until recently and a colleague showed gave me a very simple python script to extract stress and strain data, from a specific element and integration point without opening the ODB. It runs in the backgound from the command line and generates text files of the results but it could be of interest to you. 

Dear Cathal,

thanks for your reply, I am really interested in learning more about it. So feel free to send me an email and we can discuss this further.

Kind regards