Crystal Plasticity

[David Rivera]

Hi,

I am new to the moose framework and I would eventually like to run some crystal plasticity simulations.  I have been attempting to learn by running some of the test cases in the crystal plasticity module, in particular the crysp_poly.i input file, however I receive the following error:
 

A 'CrystalPlasticitySlipSysAux' is not a registered object.

I was wondering how to compile the correct libraries or if there was a detail I am not familiar with in working within the module. Thank you for your help

-David

[Andrs, David]

$ cd <where_my_moose_checkout_is>/modules/tensor_mechanics

$ make

$ cd tests/crystal_plasticity

$ ../../tensor_mechanics-opt -i crysp_poly.i

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[Cody Permann]

I just grepped for that object and it doesn't exist in the modules even though it's being used in that particular file. This file must be leftover from a previous implementation and didn't get removed. I confirmed it's not being run in the test suite.

Perhaps one of the phase-field/tensor-mechanics developers can chime in with some guidance.

Note: That file should be removed. I'm opening a ticket.

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[Chakraborty (Non-US), Pritam]

I will remove this file since it is not run while testing.

I will suggest you to look into the tests file in tensor_mechanics/tests/crystal_plasticity and try running them.

Let me know if you have questions.

Regards

Pritam

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[David Rivera]

Thank you, I really appreciate the help and clarification, the other input files appear to run without any problems.

I was interested in the crysp_poly.i input file because it appeared to be an example of how to run a polycrystal case.  Is there an existing input file of this type which I could use to get started in simulating the deformation of a multi-grained material?  Thank you.

-David

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[Chakraborty (Non-US), Pritam]

Hi David,

I have used 2 different ways to set up a polycrystal problem.

(i) Using voro++ and cubit to obtain a tet meshed polycrystal microstructure where there will be blocks for each grain. The mesh conforms so you don't have artificial stepping in this case.

(ii) Use ElementPropertyReadFile to read Euler angles. Internally a Voronoi tessellated microstructure is generated using random spatial locations of grain centers. You can get artificial stepping using this method. I will suggest you to look into moose/modules/tensor_mechanics/tests/elem_prop_read_user_object/prop_grain_read.i.

Let me know if you have any questions.

Regards

Pritam

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[David Rivera]

Hi Pritam,

Thank you for your response, this gives me a good place to start and begins to clear up some of the implementation details, thank you again.

Regards,

David

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