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/VolumeChangeEigenstrain.h"
      26              : #include "neml2/tensors/functions/pow.h"
      27              : 
      28              : namespace neml2
      29              : {
      30              : register_NEML2_object(VolumeChangeEigenstrain);
      31              : 
      32              : OptionSet
      33            2 : VolumeChangeEigenstrain::expected_options()
      34              : {
      35            2 :   OptionSet options = Eigenstrain::expected_options();
      36            2 :   options.doc() =
      37              :       "Define the (cummulative, as opposed to instantaneous) linear isotropic volume expansion "
      38              :       "eigenstrain, "
      39              :       "i.e. \\f$ \\boldsymbol{\\varepsilon}_V = (\\frac{V}{V0})^(1/3)-1 \\boldsymbol{I} \\f$, "
      40              :       "where "
      41              :       " \\f$ V \\f$ is the current volume, "
      42            2 :       "and \\f$ V0 \\f$ is the reference (initial) volume.";
      43              : 
      44            6 :   options.set_input("volume") = VariableName(STATE, "V");
      45            4 :   options.set("volume").doc() = "Volume";
      46              : 
      47            4 :   options.set_parameter<TensorName<Scalar>>("reference_volume");
      48            2 :   options.set("reference_volume").doc() = "Reference (initial) volume";
      49              : 
      50            2 :   return options;
      51            0 : }
      52              : 
      53            1 : VolumeChangeEigenstrain::VolumeChangeEigenstrain(const OptionSet & options)
      54              :   : Eigenstrain(options),
      55            3 :     _V0(declare_parameter<Scalar>("V0", "reference_volume")),
      56            2 :     _V(declare_input_variable<Scalar>("volume"))
      57              : {
      58            1 : }
      59              : 
      60              : void
      61            2 : VolumeChangeEigenstrain::set_value(bool out, bool dout_din, bool d2out_din2)
      62              : {
      63            2 :   if (out)
      64            1 :     _eg = (pow(_V / _V0, (1.0 / 3.0)) - 1.0) * SR2::identity(_V.options());
      65              : 
      66            2 :   if (dout_din)
      67              :   {
      68            1 :     if (_V.is_dependent())
      69            1 :       _eg.d(_V) = 1.0 / (3 * _V0) * pow(_V / _V0, (-2.0 / 3.0)) * SR2::identity(_V.options());
      70              :   }
      71              : 
      72            2 :   if (d2out_din2)
      73              :   {
      74            0 :     if (_V.is_dependent())
      75            0 :       _eg.d(_V, _V) =
      76            0 :           -2.0 / (9.0 * _V0 * _V0) * pow(_V / _V0, (-5.0 / 3.0)) * SR2::identity(_V.options());
      77              :   }
      78            2 : }
      79              : }
      80              : // namespace neml2