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OGS
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OGS
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<OpenGeoSysProject>
<mesh>square_1x1_quad_1e0.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>MohrCoulombAbboSloanUBI</behaviour>
<material_properties>
<material_property name="YoungModulus" parameter="YoungModulus" />
<material_property name="PoissonRatio" parameter="PoissonRatio" />
<material_property name="PlaneCohesion" parameter="PlaneCohesion" />
<material_property name="PlaneFrictionAngle" parameter="PlaneFrictionAngle" />
<material_property name="PlaneDilatancyAngle" parameter="PlaneDilatancyAngle" />
<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>
<specific_body_force>0 0</specific_body_force>
<process_variables>
<process_variable>displacement</process_variable>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="ElasticStrain" output_name="ElasticStrain" type="static" />
<secondary_variable internal_name="sigma" output_name="sigma" type="static" />
<secondary_variable internal_name="epsilon" output_name="epsilon" type="static" />
</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>IterationNumberBasedTimeStepping</type>
<t_initial>0.0</t_initial>
<t_end>2.0</t_end>
<initial_dt>0.01</initial_dt>
<minimum_dt>0.001</minimum_dt>
<maximum_dt>0.01</maximum_dt>
<number_iterations>1 4 10 20</number_iterations>
<multiplier>1.2 1.0 0.9 0.8</multiplier>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>triax_0</prefix>
<timesteps>
<pair>
<repeat>1</repeat>
<each_steps>10000</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>sigma</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<local_coordinate_system>
<basis_vector_0>e0</basis_vector_0>
<basis_vector_1>e1</basis_vector_1>
</local_coordinate_system>
<media>
<medium>
<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>e0</name>
<type>Constant</type>
<values>1 0</values>
</parameter>
<parameter>
<name>e1</name>
<type>Constant</type>
<values>0 1</values>
</parameter>
<parameter>
<name>YoungModulus</name>
<type>Constant</type>
<value>170e6</value>
</parameter>
<parameter>
<name>PoissonRatio</name>
<type>Constant</type>
<value>.22</value>
</parameter>
<parameter>
<name>PlaneCohesion</name>
<type>Constant</type>
<value>1e3</value>
</parameter>
<parameter>
<name>PlaneFrictionAngle</name>
<type>Constant</type>
<value>30</value>
</parameter>
<parameter>
<name>PlaneDilatancyAngle</name>
<type>Constant</type>
<value>0</value>
</parameter>
<parameter>
<name>Cohesion</name>
<type>Constant</type>
<value>2.e3</value>
</parameter>
<parameter>
<name>FrictionAngle</name>
<type>Constant</type>
<value>40</value>
</parameter>
<parameter>
<name>DilatancyAngle</name>
<type>Constant</type>
<value>10</value>
</parameter>
<parameter>
<name>TransitionAngle</name>
<type>Constant</type>
<value>29</value>
</parameter>
<parameter>
<name>TensionCutOffParameter</name>
<type>Constant</type>
<value>1.0</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>axial_displacement_top</name>
<type>CurveScaled</type>
<curve>dis_loading_curve</curve>
<parameter>loading_value_top</parameter>
</parameter>
<parameter>
<name>loading_value_top</name>
<type>Constant</type>
<value>-1.e-4</value>
</parameter>
<parameter>
<name>neumann_force_value_left</name>
<type>Constant</type>
<values>1e0</values>
</parameter>
<parameter>
<name>neumann_force_left</name>
<type>CurveScaled</type>
<curve>pre_loading_curve</curve>
<parameter>neumann_force_value_left</parameter>
</parameter>
<parameter>
<name>neumann_force_value_right</name>
<type>Constant</type>
<values>-1e0</values>
</parameter>
<parameter>
<name>neumann_force_right</name>
<type>CurveScaled</type>
<curve>pre_loading_curve</curve>
<parameter>neumann_force_value_right</parameter>
</parameter>
</parameters>
<curves>
<curve>
<name>dis_loading_curve</name>
<coords>0.0 1.0 2.0</coords>
<values>0.0 0.0 1.0</values>
</curve>
<curve>
<name>pre_loading_curve</name>
<coords>0.0 1.0 2.0</coords>
<values>0.0 1.0 1.0</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>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>origin</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>zero</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>top</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>axial_displacement_top</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>right</geometry>
<type>Neumann</type>
<component>0</component>
<parameter>neumann_force_right</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>square_1x1_geometry</geometrical_set>
<geometry>left</geometry>
<type>Neumann</type>
<component>0</component>
<parameter>neumann_force_left</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>40</max_iter>
<linear_solver>general_linear_solver</linear_solver>
</nonlinear_solver>
</nonlinear_solvers>
<linear_solvers>
<linear_solver>
<name>general_linear_solver</name>
<lis>-i cg -p jacobi -tol 1e-16 -maxiter 10000</lis>
<eigen>
<solver_type>SparseLU</solver_type>
<precon_type>DIAGONAL</precon_type>
</eigen>
<petsc>
<prefix>sd</prefix>
<parameters>-sd_ksp_type cg -sd_pc_type bjacobi -sd_ksp_rtol 1e-16 -sd_ksp_max_it 10000</parameters>
</petsc>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>
1.12.0