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idaholab / moose

Multiphysics Object Oriented Simulation Environment
https://www.mooseframework.org
GNU Lesser General Public License v2.1
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Improve convergence of anisotropic creep return mapping solve #20247

Open dschwen opened 2 years ago

dschwen commented 2 years ago

Reason

The lack of a line search might be what's negatively impacting the Newton-Raphson loop within the anisotropic creep.

Design

Investigate the is use of the NestedSolve helper class (which uses a libEigen non-linear solver).

Impact

If it pans out we'd get better convergence and larger time steps in anisotropic creep. @recuero

recuero commented 2 years ago

20296 Related?

recuero commented 2 years ago

If nothing else, this will remove code and broaden the user of helper functions.