Line data    Source code

       1              : // Copyright 2024, UChicago Argonne, LLC
       2              : // All Rights Reserved
       3              : // Software Name: NEML2 -- the New Engineering material Model Library, version 2
       4              : // By: Argonne National Laboratory
       5              : // OPEN SOURCE LICENSE (MIT)
       6              : //
       7              : // Permission is hereby granted, free of charge, to any person obtaining a copy
       8              : // of this software and associated documentation files (the "Software"), to deal
       9              : // in the Software without restriction, including without limitation the rights
      10              : // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      11              : // copies of the Software, and to permit persons to whom the Software is
      12              : // furnished to do so, subject to the following conditions:
      13              : //
      14              : // The above copyright notice and this permission notice shall be included in
      15              : // all copies or substantial portions of the Software.
      16              : //
      17              : // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      18              : // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      19              : // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      20              : // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      21              : // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      22              : // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      23              : // THE SOFTWARE.
      24              : 
      25              : #include "neml2/models/solid_mechanics/GursonCavitation.h"
      26              : #include "neml2/tensors/Scalar.h"
      27              : #include "neml2/tensors/SR2.h"
      28              : #include "neml2/tensors/SSR4.h"
      29              : 
      30              : namespace neml2
      31              : {
      32              : register_NEML2_object(GursonCavitation);
      33              : 
      34              : OptionSet
      35            2 : GursonCavitation::expected_options()
      36              : {
      37            2 :   OptionSet options = Model::expected_options();
      38            2 :   options.doc() = "Local mass balance used in conjunction with the GTNYieldFunction, \\f$ "
      39            2 :                   "\\dot{\\phi} = (1-\\phi) \\dot{\\varepsilon}_p \\f$.";
      40              : 
      41            6 :   options.set_input("plastic_strain_rate") = VariableName(STATE, "internal", "Ep_rate");
      42            2 :   options.set("plastic_strain_rate").doc() = "Plastic strain rate";
      43              : 
      44            6 :   options.set_input("void_fraction") = VariableName(STATE, "internal", "f");
      45            2 :   options.set("void_fraction").doc() = "Void fraction (porosity)";
      46              : 
      47            6 :   options.set_output("void_fraction_rate") = VariableName(STATE, "internal", "f_rate");
      48            2 :   options.set("void_fraction_rate").doc() = "Rate of void evolution";
      49              : 
      50            2 :   return options;
      51            0 : }
      52              : 
      53            1 : GursonCavitation::GursonCavitation(const OptionSet & options)
      54              :   : Model(options),
      55            1 :     _phi_dot(declare_output_variable<Scalar>("void_fraction_rate")),
      56            1 :     _Ep_dot(declare_input_variable<SR2>("plastic_strain_rate")),
      57            2 :     _phi(declare_input_variable<Scalar>("void_fraction"))
      58              : {
      59            1 : }
      60              : 
      61              : void
      62            2 : GursonCavitation::set_value(bool out, bool dout_din, bool /*d2out_din2*/)
      63              : {
      64            2 :   const auto ep_dot = SR2(_Ep_dot).tr();
      65              : 
      66            2 :   if (out)
      67            1 :     _phi_dot = (1 - _phi) * ep_dot;
      68              : 
      69            2 :   if (dout_din)
      70              :   {
      71            1 :     const auto I = SR2::identity(_phi.options());
      72              : 
      73            1 :     if (_phi.is_dependent())
      74            1 :       _phi_dot.d(_phi) = -ep_dot;
      75              : 
      76            1 :     if (_Ep_dot.is_dependent())
      77            1 :       _phi_dot.d(_Ep_dot) = I * (1 - _phi);
      78            1 :   }
      79            2 : }
      80              : } // namespace neml2