Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #include "PhaseFieldFractureMechanicsOffDiag.h"
      11             : 
      12             : registerMooseObject("SolidMechanicsApp", PhaseFieldFractureMechanicsOffDiag);
      13             : 
      14             : InputParameters
      15           0 : PhaseFieldFractureMechanicsOffDiag::validParams()
      16             : {
      17           0 :   InputParameters params = Kernel::validParams();
      18           0 :   params.addClassDescription("Stress divergence kernel for phase-field fracture: Computes off "
      19             :                              "diagonal damage dependent Jacobian components. To be used with "
      20             :                              "StressDivergenceTensors or DynamicStressDivergenceTensors.");
      21           0 :   params.addParam<std::string>("base_name", "Material property base name");
      22           0 :   params.addRequiredParam<unsigned int>("component",
      23             :                                         "An integer corresponding to the direction "
      24             :                                         "the variable this kernel acts in. (0 for x, "
      25             :                                         "1 for y, 2 for z)");
      26           0 :   params.addCoupledVar(
      27             :       "c",
      28             :       "Phase field damage variable: Used to indicate calculation of Off Diagonal Jacobian term");
      29           0 :   return params;
      30           0 : }
      31             : 
      32           0 : PhaseFieldFractureMechanicsOffDiag::PhaseFieldFractureMechanicsOffDiag(
      33           0 :     const InputParameters & parameters)
      34             :   : DerivativeMaterialInterface<Kernel>(parameters),
      35           0 :     _base_name(isParamValid("base_name") ? getParam<std::string>("base_name") + "_" : ""),
      36           0 :     _component(getParam<unsigned int>("component")),
      37           0 :     _c_coupled(isCoupled("c")),
      38           0 :     _c_var(_c_coupled ? coupled("c") : 0),
      39           0 :     _d_stress_dc(
      40           0 :         getMaterialPropertyDerivative<RankTwoTensor>(_base_name + "stress", coupledName("c", 0)))
      41             : {
      42           0 : }
      43             : 
      44             : Real
      45           0 : PhaseFieldFractureMechanicsOffDiag::computeQpOffDiagJacobian(unsigned int jvar)
      46             : {
      47           0 :   if (_c_coupled && jvar == _c_var)
      48             :   {
      49             :     Real val = 0.0;
      50           0 :     for (unsigned int k = 0; k < 3; ++k)
      51           0 :       val += _d_stress_dc[_qp](_component, k) * _grad_test[_i][_qp](k);
      52           0 :     return val * _phi[_j][_qp];
      53             :   }
      54             : 
      55             :   // Returns if coupled variable is not c (damage variable)
      56             :   return 0.0;
      57             : }