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/phase_field_fracture/LinearIsotropicStrainEnergyDensity.h"
      26              : #include "neml2/tensors/SSR4.h"
      27              : #include "neml2/tensors/Scalar.h"
      28              : 
      29              : namespace neml2
      30              : {
      31              : register_NEML2_object(LinearIsotropicStrainEnergyDensity);
      32              : 
      33              : OptionSet
      34            2 : LinearIsotropicStrainEnergyDensity::expected_options()
      35              : {
      36            2 :   OptionSet options = ElasticityInterface<StrainEnergyDensity, 2>::expected_options();
      37            2 :   options.doc() =
      38            2 :       "Calculates elastic strain energy density based on linear elastic isotropic response";
      39            2 :   options.set<bool>("define_second_derivatives") = true;
      40              : 
      41            2 :   return options;
      42            0 : }
      43              : 
      44            1 : LinearIsotropicStrainEnergyDensity::LinearIsotropicStrainEnergyDensity(const OptionSet & options)
      45              :   : ElasticityInterface<StrainEnergyDensity, 2>(options),
      46            1 :     _converter(_constant_types, _need_derivs)
      47              : 
      48              : {
      49            1 : }
      50              : 
      51              : void
      52            3 : LinearIsotropicStrainEnergyDensity::set_value(bool out, bool dout_din, bool d2out_din2)
      53              : {
      54            3 :   const auto [K_and_dK, G_and_dG] = _converter.convert(_constants);
      55            3 :   const auto & [K, dK] = K_and_dK;
      56            3 :   const auto & [G, dG] = G_and_dG;
      57            3 :   const auto vf = 3 * K;
      58            3 :   const auto df = 2 * G;
      59              : 
      60            3 :   const auto s = vf * SR2(_strain).vol() + df * SR2(_strain).dev();
      61              : 
      62            3 :   if (out)
      63            1 :     _psie = 0.5 * SR2(s).inner(_strain);
      64              : 
      65            3 :   if (dout_din)
      66              :   {
      67            1 :     _psie.d(_strain) = s;
      68              :   }
      69            3 :   if (d2out_din2)
      70              :   {
      71            1 :     const auto I = SSR4::identity_vol(_strain.options());
      72            1 :     const auto J = SSR4::identity_dev(_strain.options());
      73              : 
      74            1 :     _psie.d(_strain, _strain) = vf * I + df * J;
      75            1 :   }
      76            3 : }
      77              : } // namespace neml2