material_phase_phenopowerlaw.yaml

[krishnendumukherjee789-cpu]

I am new to the python evironment of DAMASK.I am going through the tutorial. I am not able to create the file material_phase_phenopowerlaw.yaml
Kindly help me,

Krishnendu Mukherjee

[hyharry]

you can follow the official video tutorial here. this repo is also a good starting point.

[krishnendumukherjee789-cpu]

Thank you Harry . I have created the material.yaml as described in the tutorial.
Can you please let me know how do I create the grain structure.
The grain orientations are I guess already given in the material.yaml file. I guess I just need to give the seed number and the seed location. The grain orientation and phase of the seed is to be linked to the material.yaml file.

Thank you.
Best regards,
Krishnendu

[eisenlohr]

If you would like to use the DAMASK grid solver, the How-To guide on Voronoi tessellation demonstrates an option to generate a polycrystalline structure.

[krishnendumukherjee789-cpu]

Thank you. I have created Polycystal_15_64x64x64.vti file. As I have the damask version 3.0.0-alpha4 , I have to use the command grid = damask.Grid.from_Voronoi_tessellation(cells,size,seeds) Hopefully this will be okay.
Now my question is how to connect these 15 grains to the 15 grains that I have described in my material.yaml file. Will it be automatically connected when I run the program after giving the load.yaml file ?

[eisenlohr]

Yes, the vti file contains a field called "material" that holds the indices (zero-based) that are used as lookup into the list of materials defined in the material.yaml file. That is, index 0 references the first entry in the list, index 1 the second, and so on.

[krishnendumukherjee789-cpu]

Thank you. I have now created the final file, tension-hold-unload.yaml following https://damask-multiphysics.org/documentation/how-to_guides/loadcase_generation.html
As I have the damask version 3.0.0-alpha4 , I have to use the command
load_case = damask.Config( solver={'mechanical': 'spectral_basic'}, loadstep=[] )
Hopefully that will be okay.
Now, kindly let me know the command to submit the job with the files, material.yaml, Polycystal_15_64x64x64.vti and tension-hold-unload.yaml
I am working in python environment.
Thank you.