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Python command to extracting stiffness matrix from abaqus model

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VARAPRASAD
Posts: 14
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(@VARAPRASAD)
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Joined: 12 years ago

Dear All:

I want to extract stiffness matrix from my model using python command.

I know how to extract stiffness matrix using input file commands, but the problem is when I want o run input file using python, pthon skip those lines correspond to extracting stiffness matrix. I dont know why. Because of this, I want to include some command inside my python code in order to extract stiffness matrix from abaqus model. But, I dont know how o do this. Could you please help me?

Thanks,

Malekan

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Jorgen
Posts: 3974
(@jorgen)
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Joined: 3 years ago

I dont understand. Global stiffness matrix or local tangent stiffness matrix?

-Jorgen

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VARAPRASAD
Posts: 14
Topic starter
(@VARAPRASAD)
Active Member
Joined: 12 years ago

Global stiffness matrix. I want to pass this matrix to another program.

Malekan

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Jorgen
Posts: 3974
(@jorgen)
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Joined: 3 years ago

I am not sure if you can do that. Let us know if you figure out a way...

-Jorgen

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VARAPRASAD
Posts: 14
Topic starter
(@VARAPRASAD)
Active Member
Joined: 12 years ago

Actually, I want to write the global stiffness matrix to a file that will read by another program. I know how to write stiffness matrix to file using input file command, but my problem is when I want use python. Do you know any command to do that?

Malekan

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Jorgen
Posts: 3974
(@jorgen)
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Joined: 3 years ago

Can you let me know how you write the stiffness matrix to file using input file command?

-Jorgen

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VARAPRASAD
Posts: 14
Topic starter
(@VARAPRASAD)
Active Member
Joined: 12 years ago

I added these lines before step definition in input file:

*STEP, name=exportmatrix
*MATRIX GENERATE, STIFFNESS
*MATRIX OUTPUT, STIFFNESS, FORMAT=LABELS
*END STEP

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