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OGS
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OGS
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<OpenGeoSysProject>
<meshes>
<mesh axially_symmetric="true">model.vtu</mesh>
<mesh axially_symmetric="true">geometry_left.vtu</mesh>
<mesh axially_symmetric="true">geometry_right.vtu</mesh>
<mesh axially_symmetric="true">geometry_top.vtu</mesh>
<mesh axially_symmetric="true">geometry_bottom.vtu</mesh>
</meshes>
<processes>
<process>
<name>SD</name>
<type>SMALL_DEFORMATION</type>
<integration_order>2</integration_order>
<constitutive_relation>
<type>MFront</type>
<behaviour>GuentherSalzer</behaviour>
<material_properties>
<material_property name="YoungModulus" parameter="YoungModulus" />
<material_property name="PoissonRatio" parameter="PoissonRatio" />
<material_property name="PrimaryPowerLawFactor" parameter="Ap" />
<material_property name="PrimaryPowerLawExponent" parameter="np" />
<material_property name="SecondaryPowerLawFactor1" parameter="As1" />
<material_property name="SecondaryPowerLawExponent1" parameter="ns1" />
<material_property name="SecondaryActivationEnergy1" parameter="Q1" />
<material_property name="SecondaryPowerLawFactor2" parameter="As2" />
<material_property name="SecondaryPowerLawExponent2" parameter="ns2" />
<material_property name="SecondaryActivationEnergy2" parameter="Q2" />
<material_property name="HardeningExponent" parameter="mup" />
<material_property name="InitialHardening" parameter="epsV0" />
<material_property name="ReferenceStress" parameter="sref" />
</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="ElasticStrain" output_name="ElasticStrain" />
<secondary_variable internal_name="HardeningStrain" output_name="HardeningStrain" />
</secondary_variables>
<reference_temperature>T_ref</reference_temperature>
</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>IterationNumberBasedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>200</t_end>
<initial_dt>1</initial_dt>
<minimum_dt>1.e-3</minimum_dt>
<maximum_dt>10.</maximum_dt>
<number_iterations>1 5 10 15</number_iterations>
<multiplier>1.2 1.0 0.8 0.6</multiplier>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>uniaxial_test_output</prefix>
<timesteps>
<pair>
<repeat>10000</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
</variables>
</output>
</time_loop>
<media>
<medium>
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>0</value>
</property>
</properties>
</phase>
</phases>
</medium>
</media>
<parameters>
<parameter>
<name>YoungModulus</name>
<type>Constant</type>
<value>1e5</value>
</parameter>
<parameter>
<name>PoissonRatio</name>
<type>Constant</type>
<value>0.27</value>
</parameter>
<parameter>
<name>Ap</name>
<type>Constant</type>
<value>6.5e-24</value>
</parameter>
<parameter>
<name>np</name>
<type>Constant</type>
<value>11.88</value>
</parameter>
<parameter>
<name>As1</name>
<type>Constant</type>
<value>0.001</value>
</parameter>
<parameter>
<name>ns1</name>
<type>Constant</type>
<value>2.7</value>
</parameter>
<parameter>
<name>Q1</name>
<type>Constant</type>
<value>40e3</value>
</parameter>
<parameter>
<name>As2</name>
<type>Constant</type>
<value>0.001</value>
</parameter>
<parameter>
<name>ns2</name>
<type>Constant</type>
<value>6.8</value>
</parameter>
<parameter>
<name>Q2</name>
<type>Constant</type>
<value>65e3</value>
</parameter>
<parameter>
<name>mup</name>
<type>Constant</type>
<value>2.95</value>
</parameter>
<parameter>
<name>sref</name>
<type>Constant</type>
<value>1.0</value>
</parameter>
<parameter>
<name>epsV0</name>
<type>Constant</type>
<value>1.e-4</value>
</parameter>
<parameter>
<name>T_ref</name>
<type>Constant</type>
<value>293.15</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0</values>
</parameter>
<parameter>
<name>zero</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>axial_pressure</name>
<type>CurveScaled</type>
<curve>ax_loading_curve</curve>
<parameter>loading_value_top</parameter>
</parameter>
<parameter>
<name>loading_value_top</name>
<type>Constant</type>
<value>-1</value>
</parameter>
</parameters>
<curves>
<curve>
<name>ax_loading_curve</name>
<coords>0.0 0.1 60.0 60.1 200</coords>
<values>0.0 16.0 16.0 25.0 25.0</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>geometry_left</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>geometry_bottom</mesh>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>geometry_top</mesh>
<type>Neumann</type>
<component>1</component>
<parameter>axial_pressure</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>60</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>uniaxial_test_output_ts_199_t_199.000000.vtu</file>
<field>displacement</field>
<absolute_tolerance>9e-14</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<file>uniaxial_test_output_ts_199_t_199.000000.vtu</file>
<field>sigma</field>
<absolute_tolerance>9e-8</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
</test_definition>
</OpenGeoSysProject>
1.11.0