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OGS
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OGS
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<OpenGeoSysProject>
<mesh>square_1x1_quad_1e1_2_matIDs.vtu</mesh>
<geometry>square_1x1.gml</geometry>
<processes>
<process>
<name>SD</name>
<type>SMALL_DEFORMATION</type>
<integration_order>2</integration_order>
<constitutive_relation>
<type>MFront</type>
<behaviour>DruckerPrager</behaviour>
<material_properties>
<material_property name="YoungModulus" parameter="E" />
<material_property name="PoissonRatio" parameter="nu" />
<material_property name="Cohesion" parameter="kappa" />
<material_property name="FrictionParameter" parameter="beta" />
<material_property name="DilatancyParameter" parameter="beta" />
</material_properties>
</constitutive_relation>
<specific_body_force>0 0</specific_body_force>
<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_variable internal_name="EquivalentPlasticStrain" output_name="EquivalentPlasticStrain" />
</secondary_variables>
</process>
</processes>
<time_loop>
<processes>
<process ref="SD">
<nonlinear_solver>basic_newton</nonlinear_solver>
<convergence_criterion>
<type>DeltaX</type>
<norm_type>NORM2</norm_type>
<abstol>1e-14</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>IterationNumberBasedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>1</t_end>
<initial_dt>0.1</initial_dt>
<minimum_dt>1.e-4</minimum_dt>
<maximum_dt>1</maximum_dt>
<number_iterations>1 4 10 15</number_iterations>
<multiplier>1.2 1.0 0.8 0.6</multiplier>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>two_material_ids_single_solid</prefix>
<suffix>t{:.4ftime}</suffix>
<timesteps>
<pair>
<repeat>1</repeat>
<each_steps>10000</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
<variable>EquivalentPlasticStrain</variable>
<variable>MaterialForces</variable>
<variable>NodalForces</variable>
</variables>
</output>
</time_loop>
<media>
<medium id="0, 1">
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>1</value>
</property>
</properties>
</phase>
</phases>
</medium>
</media>
<parameters>
<parameter>
<name>E</name>
<type>Constant</type>
<value>360</value>
</parameter>
<parameter>
<name>nu</name>
<type>Constant</type>
<value>0.2</value>
</parameter>
<parameter>
<name>kappa</name>
<type>Constant</type>
<value>0.0866</value>
</parameter>
<parameter>
<name>beta</name>
<type>Constant</type>
<value>0.1667</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0</values>
</parameter>
<parameter>
<name>dirichlet0</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>dirichletLinearNeg</name>
<type>Function</type>
<expression>-0.0005*t</expression>
</parameter>
<parameter>
<name>dirichletLinearPos</name>
<type>Function</type>
<expression>0.0005*t</expression>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>displacement</name>
<components>2</components>
<order>1</order>
<initial_condition>displacement0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>left</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>dirichlet0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>dirichlet0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>right</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>dirichletLinearPos</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>top</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>dirichletLinearNeg</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>20</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>BiCGSTAB</solver_type>
<precon_type>NONE</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-16</error_tolerance>
</eigen>
</linear_solver>
</linear_solvers>
<test_definition>
<vtkdiff>
<regex>two_material_ids_single_solid_t_.*.vtu</regex>
<field>displacement</field>
<absolute_tolerance>1e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>two_material_ids_single_solid_t_.*.vtu</regex>
<field>sigma</field>
<absolute_tolerance>3e-13</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>two_material_ids_single_solid_t_.*.vtu</regex>
<field>epsilon</field>
<absolute_tolerance>3e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>two_material_ids_single_solid_t_.*.vtu</regex>
<field>EquivalentPlasticStrain</field>
<absolute_tolerance>3e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>two_material_ids_single_solid_t_.*.vtu</regex>
<field>MaterialForces</field>
<absolute_tolerance>1e-15</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>two_material_ids_single_solid_t_.*.vtu</regex>
<field>NodalForces</field>
<absolute_tolerance>6e-13</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
</test_definition>
</OpenGeoSysProject>
1.11.0