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Huang's subroutine for plasticity of single crystal

Dear All,

I am using Huang subroutine for my model which is a polycrystal of FCC material. The problem is that I faced with the error code 145 in Abaqus which is related to singularity. Does anyone have any idea that what I should do?

Thank you,

Arman,

You probably have a divide by zero happening. Try to brute force debug the UMAT by using WRITE (7,*) statements and finding out where exactly it happens.

 

 

You probably have a divide by zero happening. Try to brute force debug the UMAT by using WRITE (7,*) statements and finding out where exactly it happens.

 

 

Frank Richter's picture

Hello

 

errors 14x have been discussed in the ABAQUS mailing list
https://groups.yahoo.com/group/ABAQUS

Search the archive.

The error, particularly error 144, is quite common when using subroutines and was reported also in one case when using only standard commands. One posting reported this error when porting the code to another operating system.

My advice, which relates to error 144, is to modify the initial, maximum and minimum time increment. Try increasing and decreasing these parameters. Define a parameter study for convenience. This is a workaround, though not an explanation.

Good luck

Frank

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