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OGS
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OGS
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<OpenGeoSysProject>
<mesh>cube_1x1x1_hex_1e0.vtu</mesh>
<geometry>cube_1x1x1.gml</geometry>
<processes>
<process>
<name>SD</name>
<type>SMALL_DEFORMATION</type>
<integration_order>2</integration_order>
<constitutive_relation>
<type>MFront</type>
<behaviour>PowerLawLinearCreep</behaviour>
<material_properties>
<material_property name="YoungModulus" parameter="E" />
<material_property name="PoissonRatio" parameter="nu" />
<material_property name="PowerLawFactor" parameter="A" />
<material_property name="PowerLawEnergy" parameter="Q" />
<material_property name="PowerLawExponent" parameter="n" />
<material_property name="ReferenceStress" parameter="sigma_f" />
<material_property name="LinearLawFactor" parameter="A2" />
<material_property name="LinearLawEnergy" parameter="Q2" />
<material_property name="SaltGrainSize" parameter="Dgrain" />
</material_properties>
</constitutive_relation>
<specific_body_force>0 0 0</specific_body_force>
<reference_temperature>T_ref</reference_temperature>
<process_variables>
<process_variable>displacement</process_variable>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="ElasticStrain" output_name="ElasticStrain" />
<secondary_variable internal_name="sigma" output_name="sigma" />
<secondary_variable internal_name="epsilon" output_name="epsilon" />
</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-12</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>2</t_end>
<timesteps>
<pair>
<repeat>1</repeat>
<delta_t>1</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>uniax_compression</prefix>
<timesteps>
<pair>
<repeat>1</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
<variable>ElasticStrain</variable>
<variable>NodalForces</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<media>
<medium>
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>2570.0</value>
</property>
</properties>
</phase>
</phases>
</medium>
</media>
<parameters>
<parameter>
<name>T_ref</name>
<type>Constant</type>
<value>298.15</value>
</parameter>
<parameter>
<name>E</name>
<type>Constant</type>
<value>25e9</value>
</parameter>
<parameter>
<name>nu</name>
<type>Constant</type>
<value>0.25</value>
</parameter>
<parameter>
<name>A</name>
<type>Constant</type>
<value>0.18</value>
</parameter>
<parameter>
<name>n</name>
<type>Constant</type>
<value>5.0</value>
</parameter>
<parameter>
<name>sigma_f</name>
<type>Constant</type>
<value>1e6</value>
</parameter>
<parameter>
<name>Q</name>
<type>Constant</type>
<value>54000</value>
</parameter>
<parameter>
<name>A2</name>
<type>Constant</type>
<value>6.5e-5</value>
</parameter>
<parameter>
<name>Q2</name>
<type>Constant</type>
<value>24500</value>
</parameter>
<parameter>
<name>Dgrain</name>
<type>Constant</type>
<value>5e-2</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0 0</values>
</parameter>
<parameter>
<name>sigma_ax</name>
<type>Constant</type>
<value>-1e6</value>
</parameter>
<parameter>
<name>zero</name>
<type>Constant</type>
<value>0</value>
</parameter>
</parameters>
<process_variables>
<process_variable>
<name>displacement</name>
<components>3</components>
<order>1</order>
<initial_condition>displacement0</initial_condition>
<boundary_conditions>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>left</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>front</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<component>2</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>cube_1x1x1_geometry</geometrical_set>
<geometry>top</geometry>
<type>Neumann</type>
<component>2</component>
<parameter>sigma_ax</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>100</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>
</linear_solver>
</linear_solvers>
<test_definition>
<vtkdiff>
<file>uniax_compression_ts_2_t_2.000000.vtu</file>
<field>displacement</field>
<absolute_tolerance>1e-13</absolute_tolerance>
<relative_tolerance>1e-14</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>uniax_compression_ts_2_t_2.000000.vtu</file>
<field>NodalForces</field>
<absolute_tolerance>1e-9</absolute_tolerance>
<relative_tolerance>1e-11</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>uniax_compression_ts_2_t_2.000000.vtu</file>
<field>sigma</field>
<absolute_tolerance>1e-8</absolute_tolerance>
<relative_tolerance>1e-12</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>uniax_compression_ts_2_t_2.000000.vtu</file>
<field>epsilon</field>
<absolute_tolerance>1e-14</absolute_tolerance>
<relative_tolerance>1e-15</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>uniax_compression_ts_2_t_2.000000.vtu</file>
<field>ElasticStrain</field>
<absolute_tolerance>1e-14</absolute_tolerance>
<relative_tolerance>1e-15</relative_tolerance>
</vtkdiff>
</test_definition>
</OpenGeoSysProject>
1.12.0