WIP: Added P91LAROMANCEStressUpdate

[tophmatthews]

Closes #141

[tophmatthews]

Ping @sapitts. This is the P91 ROM. I match plastic strain rates well, but am missing dislocation density rates...Not sure why yet, and I'm still digging, but I thought you may want to see it too.

[sapitts]

Thanks @tophmatthews. I had a separate version of this class that I was working with from Aaron's email, but I will abandon that one in favor of yours (they ought to be identical anyway).

To make things easier on Lynn, since Blackbear doesn't have a tied MOOSE submodule and we need the error checking update still in a pull request, I'm going to drop this code into a MOOSE only branch (so Lynn will only have to pull that branch, rather than making sure he has your Blackbear branch and my MOOSE branch) to get through this milestone. Once Civet returns I'll delete that branch and we'll proceed with yours in blackbear

[tophmatthews]

No worries @sapitts! Just wanted to all be on the same page.

[sapitts]

For consistency, I've modified the above lines with the following, based on Aaron's email:

  params.addRangeCheckedParam<Real>("initial_cell_dislocation_density",
                                    4.0e12,
                                    "initial_cell_dislocation_density >=1.0+12 & "
                                    "initial_cell_dislocation_density <= 6.0E+12",
                                    "Initial density of cell (glissile) dislocations (1/m^2)");
  params.addRangeCheckedParam<Real>(
      "max_relative_cell_dislocation_increment",
      0.5,
      "max_relative_cell_dislocation_increment > 0.0",
      "Maximum increment of density of cell (glissile) dislocations.");
  params.addRangeCheckedParam<Real>(
      "initial_wall_dislocation_density",
      10.0e12,
      "initial_wall_dislocation_density >= 6.0e12 & "
      "initial_wall_dislocation_density <= 18.0e12",
      "Cell wall (locked) dislocation density initial value (1/m^2).");

[sapitts]

for later, I just noticed the HT9 reference here