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OGS
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OGS
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<OpenGeoSysProject>
<meshes>
<mesh>A2.vtu</mesh>
<mesh>A2_0.vtu</mesh>
<mesh>A2_1.vtu</mesh>
<mesh>A2_2.vtu</mesh>
<mesh>A2_3.vtu</mesh>
<mesh>A2_4.vtu</mesh>
<mesh>A2_5.vtu</mesh>
<mesh>A2_6.vtu</mesh>
<mesh>A2_7.vtu</mesh>
</meshes>
<processes>
<process>
<name>SD</name>
<type>SMALL_DEFORMATION</type>
<integration_order>2</integration_order>
<constitutive_relation id="0,1">
<type>LinearElasticIsotropic</type>
<youngs_modulus>E</youngs_modulus>
<poissons_ratio>nu</poissons_ratio>
</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_variables>
<initial_stress>sigma0</initial_stress>
</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-10</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>8</t_end>
<timesteps>
<pair>
<repeat>2</repeat>
<delta_t>0.5</delta_t>
</pair>
<pair>
<repeat>35</repeat>
<delta_t>0.2</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>time_linear_excavation_A2</prefix>
<timesteps>
<pair>
<repeat>40</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<media>
<medium id="0, 1">
<phases>
<phase>
<type>Solid</type>
<properties>
<property>
<name>density</name>
<type>Constant</type>
<value>1200</value>
</property>
</properties>
</phase>
</phases>
</medium>
</media>
<parameters>
<parameter>
<name>sigma0</name>
<type>Constant</type>
<values>-7.6e6 -9.6e6 -4.9e6 0</values>
</parameter>
<parameter>
<name>E</name>
<type>Constant</type>
<value>4000e6</value>
</parameter>
<parameter>
<name>nu</name>
<type>Constant</type>
<value>.35</value>
</parameter>
<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>load_top</name>
<type>Constant</type>
<values>-9.6e6</values>
</parameter>
</parameters>
<curves>
<curve>
<name>excavation_curve</name>
<coords>1 2 8</coords>
<values>2.5 2 1.25</values>
</curve>
</curves>
<process_variables>
<process_variable>
<name>displacement</name>
<components>2</components>
<order>1</order>
<initial_condition>displacement0</initial_condition>
<deactivated_subdomains>
<deactivated_subdomain>
<time_interval>
<start>0.51</start>
<end>1.0</end>
</time_interval>
<material_ids>0</material_ids>
</deactivated_subdomain>
<deactivated_subdomain>
<time_curve>excavation_curve</time_curve>
<line_segment>
<start>0 0 0</start>
<end>2.5 0 0</end>
</line_segment>
<material_ids>0</material_ids>
</deactivated_subdomain>
</deactivated_subdomains>
<boundary_conditions>
<boundary_condition>
<mesh>A2_0</mesh>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>A2_7</mesh>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>A2_3</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>A2_4</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>A2_6</mesh>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<mesh>A2_5</mesh>
<type>Neumann</type>
<component>1</component>
<parameter>load_top</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>10</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>DIAGONAL</precon_type>
<max_iteration_step>10000</max_iteration_step>
<error_tolerance>1e-14</error_tolerance>
</eigen>
</linear_solver>
</linear_solvers>
<test_definition>
<vtkdiff>
<regex>time_linear_excavation_A2_ts_.*_t_.*.vtu</regex>
<field>displacement</field>
<absolute_tolerance>3e-13</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>time_linear_excavation_A2_ts_.*_t_.*.vtu</regex>
<field>epsilon</field>
<absolute_tolerance>3e-13</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
<vtkdiff>
<regex>time_linear_excavation_A2_ts_.*_t_.*.vtu</regex>
<field>sigma</field>
<absolute_tolerance>2e-5</absolute_tolerance>
<relative_tolerance>0</relative_tolerance>
</vtkdiff>
</test_definition>
</OpenGeoSysProject>
1.12.0