Field-variable-dependent DIFFUSIVITY

[adp0014]

Hello everybody

I would like to make a mass diffusion analysis with ABAQUS in which the diffusivity coefficient D is dependent on the equivalent plastic strain (PEEQ in ABAQUS) obtained in a previous static analysis. I'm confused about whether should I use the USDFLD subroutine or another one, and how to use it. I'm a beginner in writing user subroutines.

Thanks in advanced!