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user subroutine Gapelectr

user subroutine Gapelectr

user subroutine Gapelectr

(OP)
I am trying to use Abaqus to model corrosion.  I set up a simple test to try and understand the user subroutine Gapelectr and *Gap Electrical conductance.

I have figured out that Abaqus is thinking that Temp(1) and Temp(2) are zero (really electrical potential (1) and electrical potential (2)) across the gap.

This is even after I set up a multiple increment step, in which on increment 1, I leave out any dependence on the difference in potential and just set the Gap to a specified conductance.  Thus, a definite potential gradient should form across the gap.  However, on increment 2, I ran a test where I set sigma(1) = Temp(1) (I also tried Temp(2) and Temp(1)-Temp(2)).  And everytime I get a zero current.  So this is why I think Abaqus thinks that Temp(1) and Temp(2) are zero.

Any thoughts, or has anyone used Abaqus for electrochemistry, corrosion, galvanic corrosion, Butler-Volmer models, etc.?  Thank you very much.

RE: user subroutine Gapelectr

(OP)
I think the real issue is that I need to pass in the electrical potential to my user subroutine, but after scouring the help files, I can't figure out how to do this.

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