<OpenGeoSysProject>
  <meshes>
    <mesh>domain.vtu</mesh>
    <mesh>top.vtu</mesh>
    <mesh>bottom.vtu</mesh>
    <mesh>left.vtu</mesh>
    <mesh>right.vtu</mesh>
  </meshes>
  <processes>
    <process>
      <name>SD</name>
      <type>SMALL_DEFORMATION</type>
      <integration_order>2</integration_order>
      <reference_temperature>T0</reference_temperature>
      <process_variables>
        <process_variable>displacement</process_variable>
      </process_variables>
      <secondary_variables>
        <secondary_variable internal_name="sigma" output_name="sigma" />
        <secondary_variable internal_name="epsilon" output_name="epsilon" />
      </secondary_variables>
      <specific_body_force>0. -9.81</specific_body_force>
      <initial_stress>sigma0</initial_stress>
      <constitutive_relation id="0">
        <type>MFront</type>
        <behaviour>MohrCoulombAbboSloan</behaviour>
        <material_properties>
          <material_property name="YoungModulus" parameter="E" />
          <material_property name="PoissonRatio" parameter="nu" />
          <material_property name="Cohesion" parameter="Cohesion" />
          <material_property name="FrictionAngle" parameter="FrictionAngle" />
          <material_property name="DilatancyAngle" parameter="DilatancyAngle" />
          <material_property name="TransitionAngle" parameter="TransitionAngle" />
          <material_property name="TensionCutOffParameter" parameter="TensionCutOffParameter" />
        </material_properties>
      </constitutive_relation>
      <constitutive_relation id="1">
        <type>LinearElasticIsotropicSoftening</type>
        <youngs_modulus>E</youngs_modulus>
        <poissons_ratio>nu</poissons_ratio>
        <strength>strength</strength>
      </constitutive_relation>
    </process>
  </processes>
  <media>
    <medium id="0">
      <phases>
        <phase>
          <type>Solid</type>
          <properties>
            <property>
              <name>density</name>
              <type>Parameter</type>
              <parameter_name>density</parameter_name>
            </property>
          </properties>
        </phase>
      </phases>
      <properties />
    </medium>
    <medium id="1">
      <phases>
        <phase>
          <type>Solid</type>
          <properties>
            <property>
              <name>density</name>
              <type>Parameter</type>
              <parameter_name>density_relaxing</parameter_name>
            </property>
          </properties>
        </phase>
      </phases>
      <properties />
    </medium>
  </media>
  <time_loop>
    <processes>
      <process ref="SD">
        <nonlinear_solver>basic_newton</nonlinear_solver>
        <convergence_criterion>
          <type>PerComponentDeltaX</type>
          <norm_type>NORM2</norm_type>
          <abstols>1.e-5 1.e-5</abstols>
          <reltols>1.e-5 1.e-5</reltols>
        </convergence_criterion>
        <time_discretization>
          <type>BackwardEuler</type>
        </time_discretization>
        <time_stepping>
          <type>IterationNumberBasedTimeStepping</type>
          <t_initial>0.0</t_initial>
          <t_end>8640000</t_end>
          <initial_dt>86400</initial_dt>
          <minimum_dt>86400</minimum_dt>
          <maximum_dt>432000</maximum_dt>
          <number_iterations>1 4 10 15 20 25 31</number_iterations>
          <multiplier>1.5 1.3 1.2 1.1 0.8 0.7 0.6</multiplier>
        </time_stepping>
      </process>
    </processes>
    <output>
      <type>VTK</type>
      <prefix>SD_softening_excavation</prefix>
      <suffix>ts{:gtime}</suffix>
      <timesteps>
        <pair>
          <repeat>1</repeat>
          <each_steps>1</each_steps>
        </pair>
      </timesteps>
      <variables />
      <fixed_output_times />
    </output>
  </time_loop>
  <parameters>
    <parameter>
      <name>displacement0</name>
      <type>Constant</type>
      <values>0 0</values>
    </parameter>
    <parameter>
      <name>zero</name>
      <type>Constant</type>
      <value>0</value>
    </parameter>
    <parameter>
      <name>one</name>
      <type>Constant</type>
      <value>1</value>
    </parameter>
    <parameter>
      <name>T0</name>
      <type>Constant</type>
      <value>300</value>
    </parameter>
    <parameter>
      <name>density</name>
      <type>Constant</type>
      <value>2600</value>
    </parameter>
    <parameter>
      <name>sigma0</name>
      <type>MeshElement</type>
      <field_name>sigma0</field_name>
    </parameter>
    <parameter>
      <name>geo_stress</name>
      <type>Function</type>
      <expression>2600*9.81*y</expression>
    </parameter>
    <parameter>
      <name>density_relaxing</name>
      <type>CurveScaled</type>
      <curve>strength_curve</curve>
      <parameter>density</parameter>
    </parameter>
    <parameter>
      <name>strength</name>
      <type>CurveScaled</type>
      <curve>strength_curve</curve>
      <parameter>one</parameter>
    </parameter>
    <parameter>
      <name>E</name>
      <type>Constant</type>
      <value>1500000000.0</value>
    </parameter>
    <parameter>
      <name>nu</name>
      <type>Constant</type>
      <value>0.25</value>
    </parameter>
    <parameter>
      <name>Cohesion</name>
      <type>Constant</type>
      <value>3000000.0</value>
    </parameter>
    <parameter>
      <name>FrictionAngle</name>
      <type>Constant</type>
      <value>25</value>
    </parameter>
    <parameter>
      <name>DilatancyAngle</name>
      <type>Constant</type>
      <value>0</value>
    </parameter>
    <parameter>
      <name>TransitionAngle</name>
      <type>Constant</type>
      <value>0</value>
    </parameter>
    <parameter>
      <name>TensionCutOffParameter</name>
      <type>Constant</type>
      <value>0</value>
    </parameter>
  </parameters>
  <curves>
    <curve>
      <name>strength_curve</name>
      <coords>0.0 8640000</coords>
      <values>1.0 1e-12</values>
    </curve>
  </curves>
  <process_variables>
    <process_variable>
      <name>displacement</name>
      <components>2</components>
      <order>1</order>
      <initial_condition>displacement0</initial_condition>
      <boundary_conditions>
        <boundary_condition>
          <mesh>left</mesh>
          <type>Dirichlet</type>
          <component>0</component>
          <parameter>zero</parameter>
        </boundary_condition>
        <boundary_condition>
          <mesh>bottom</mesh>
          <type>Dirichlet</type>
          <component>1</component>
          <parameter>zero</parameter>
        </boundary_condition>
        <boundary_condition>
          <mesh>right</mesh>
          <type>Dirichlet</type>
          <component>0</component>
          <parameter>zero</parameter>
        </boundary_condition>
        <boundary_condition>
          <mesh>top</mesh>
          <type>Neumann</type>
          <component>1</component>
          <parameter>geo_stress</parameter>
        </boundary_condition>
      </boundary_conditions>
    </process_variable>
  </process_variables>
  <nonlinear_solvers>
    <nonlinear_solver>
      <name>basic_newton</name>
      <type>Newton</type>
      <max_iter>30</max_iter>
      <linear_solver>general_linear_solver</linear_solver>
    </nonlinear_solver>
  </nonlinear_solvers>
  <linear_solvers>
    <linear_solver>
      <name>general_linear_solver</name>
      <eigen>
        <solver_type>SparseLU</solver_type>
        <scaling>true</scaling>
      </eigen>
      <petsc>
        <parameters>-ksp_type bcgs
                    -pc_type ilu
                    -ksp_rtol 1.e-20 -ksp_atol 1.e-18
                    -ksp_max_it 4000</parameters>
      </petsc>
    </linear_solver>
  </linear_solvers>
  <test_definition>
    <vtkdiff>
      <regex>SD_softening_excavation_ts_.*.vtu</regex>
      <field>displacement</field>
      <absolute_tolerance>1.0e-10</absolute_tolerance>
      <relative_tolerance>0</relative_tolerance>
    </vtkdiff>
    <vtkdiff>
      <regex>SD_softening_excavation_ts_.*.vtu</regex>
      <field>sigma</field>
      <absolute_tolerance>0</absolute_tolerance>
      <relative_tolerance>1.0e-5</relative_tolerance>
    </vtkdiff>
    <vtkdiff>
      <regex>SD_softening_excavation_ts_.*.vtu</regex>
      <field>epsilon</field>
      <absolute_tolerance>0</absolute_tolerance>
      <relative_tolerance>1.0e-5</relative_tolerance>
    </vtkdiff>
  </test_definition>
</OpenGeoSysProject>