Abaqus Sequential Thermo-Mechanical

lmorand · Sep 8, 2022

Good morning all,
I'm running uncoupled sequential thermo-mechanical simulations (for AM).
This means that I'm using the .obd file from the heat transfer simulation as a predefined field in the mechanical simulation.
However, I'd like to do a temperature cutoff for the nodal temperatures that are being fed into the mechanical model.
For example, any values over 1500 C would be overwritten to be 1500 C.

Is there a way to do this within Abaqus? I'd rather not have to open and edit the long .odb file by hand.

Thank you for any ideas!

FEA way · Sep 30, 2022

You could use Python scripting for that. You would likely have to utilize it to create a new odb and write field output (in form of modified field output read from the original database) to it. Check the documentation chapter "Scripting --> Accessing an Output Database --> Using the Abaqus Scripting Interface to access an output database --> Writing to an output database".

lmorand · Sep 30, 2022

For anyone with the same issue, here is what I did:
-Generate report from ODB in Viewer GUI in CSV format
-Run MATLAB script to identify temps above threshold value
-Run MATLAB script to replace temps above threshold value with threshold value
-Run MATLAB script to write to new CSV file
-Use UTEMP subroutine to define temperatures at specific time steps and nodes in mechanical analysis

I was not able to use python because of the encryption of the ODB. It would have been difficult to then create a modified ODB with my edited temperatures when the ODB structure was not clear.

Hope this helps someone.

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Abaqus Sequential Thermo-Mechanical

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