iMechanica - Extended Chaboche viscoplastic model for cyclic loading - Comments

I have a technical report of

jovebird — Wed, 02 Apr 2008 16:21:18 -0400

I have a technical report of implement viscoplastic model for single crystle. let me know if you want

I am doing similar thing

jovebird — Thu, 27 Mar 2008 13:46:06 -0400

I am doing similar thing with you, coding a UMAT in abaqus for a
elastic-viscoplastic model. I work in a civil engineering field and this model
is overstress viscoplastic type of model for soil. With experience of
implementing the elastic-viscoplastic model in AFENA, I still feel difficulty in
convergence issues.
Hope we can share some experience in this work.

Extended Chaboche viscoplastic model for cyclic loading

Fatigueless — Sun, 16 Mar 2008 23:20:56 -0400

These days I've been applying oneself to implement the Chaboche viscoplastic model in ABAQUS user-subroutine for simulating the cyclic loading in single crystals.
The procedure can easily get out. I'm not sure about the problem, the deduction of Jacobian, the convergence?
Btw, I know there is free subroutine for crystal plasticity by Huang YG. I wonder if the UMAT routine for chaboche model is available, then I can generalize it to fit for my case.
If pity there isn't, guide or example for viscoplastic model can be of great help also.
Thanks a lot

maxianfeng@gmail.com