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OGS
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OGS
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<OpenGeoSysProject>
<mesh>griffith_quad.vtu</mesh>
<geometry>griffith.gml</geometry>
<search_length_algorithm>
<type>fixed</type>
<value>1e-4</value>
</search_length_algorithm>
<processes>
<process>
<name>SD</name>
<type>SMALL_DEFORMATION_NONLOCAL</type>
<integration_order>4</integration_order>
<constitutive_relation>
<type>Ehlers</type>
<shear_modulus>G</shear_modulus>
<bulk_modulus>K</bulk_modulus>
<kappa>kappa</kappa>
<beta>beta</beta>
<gamma>gamma</gamma>
<hardening_modulus>hard</hardening_modulus>
<alpha>alpha</alpha>
<delta>delta</delta>
<eps>epsilon</eps>
<m>m</m>
<alphap>alphap</alphap>
<deltap>deltap</deltap>
<epsp>epsilonp</epsp>
<mp>mp</mp>
<betap>betap</betap>
<gammap>gammap</gammap>
<tangent_type>Plastic</tangent_type>
<damage_properties>
<alpha_d>alphad</alpha_d>
<beta_d>betad</beta_d>
<h_d>hd</h_d>
</damage_properties>
<nonlinear_solver>
<maximum_iterations>100</maximum_iterations>
<residuum_tolerance>1e-10</residuum_tolerance>
<increment_tolerance>0</increment_tolerance>
</nonlinear_solver>
</constitutive_relation>
<solid_density>rho_sr</solid_density>
<specific_body_force>0 0</specific_body_force>
<internal_length>0.01e-6</internal_length>
<process_variables>
<process_variable>displacement</process_variable>
</process_variables>
<secondary_variables>
<secondary_variable internal_name="damage" output_name="damage" />
<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-6</abstol>
</convergence_criterion>
<time_discretization>
<type>BackwardEuler</type>
</time_discretization>
<time_stepping>
<type>FixedTimeStepping</type>
<t_initial>0</t_initial>
<t_end>1</t_end>
<timesteps>
<pair>
<repeat>1000000</repeat>
<delta_t>0.05</delta_t>
</pair>
</timesteps>
</time_stepping>
</process>
</processes>
<output>
<type>VTK</type>
<prefix>out_crack</prefix>
<timesteps>
<pair>
<repeat>10000</repeat>
<each_steps>1</each_steps>
</pair>
</timesteps>
<variables>
<variable>displacement</variable>
<variable>damage</variable>
<variable>sigma</variable>
<variable>epsilon</variable>
</variables>
<suffix>ts{:timestep}_t_{:time}</suffix>
</output>
</time_loop>
<parameters>
<parameter>
<name>G</name>
<type>Constant</type>
<value>34.78e9</value>
</parameter>
<parameter>
<name>K</name>
<type>Constant</type>
<value>38.10e9</value>
</parameter>
<parameter>
<name>kappa</name>
<type>MeshElement</type>
<field_name>strength</field_name>
</parameter>
<parameter>
<name>beta</name>
<type>Constant</type>
<value>0.47</value>
</parameter>
<parameter>
<name>gamma</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>hard</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>alpha</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>delta</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>epsilon</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>m</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>alphap</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>deltap</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>epsilonp</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>mp</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>betap</name>
<type>Constant</type>
<value>0.47</value>
</parameter>
<parameter>
<name>gammap</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>alphad</name>
<type>Constant</type>
<value>0.0001</value>
</parameter>
<parameter>
<name>betad</name>
<type>Constant</type>
<value>0.001</value>
</parameter>
<parameter>
<name>hd</name>
<type>Constant</type>
<value>0.0</value>
</parameter>
<parameter>
<name>displacement0</name>
<type>Constant</type>
<values>0 0</values>
</parameter>
<parameter>
<name>Dirichlet_0</name>
<type>Constant</type>
<value>0.</value>
</parameter>
<parameter>
<name>Dirichlet_load</name>
<type>Constant</type>
<value>1.</value>
</parameter>
<parameter>
<name>Dirichlet_top_y</name>
<type>CurveScaled</type>
<curve>Dirichlet_top_time</curve>
<parameter>Dirichlet_load</parameter>
</parameter>
<parameter>
<name>rho_sr</name>
<type>Constant</type>
<value>1</value>
</parameter>
</parameters>
<curves>
<curve>
<name>Dirichlet_top_time</name>
<coords>0. 1.0</coords>
<values>0. 0.0001</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>griffith</geometrical_set>
<geometry>bottom</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>Dirichlet_0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>griffith</geometrical_set>
<geometry>p_0</geometry>
<type>Dirichlet</type>
<component>0</component>
<parameter>Dirichlet_0</parameter>
</boundary_condition>
<boundary_condition>
<geometrical_set>griffith</geometrical_set>
<geometry>top</geometry>
<type>Dirichlet</type>
<component>1</component>
<parameter>Dirichlet_top_y</parameter>
</boundary_condition>
</boundary_conditions>
</process_variable>
</process_variables>
<nonlinear_solvers>
<nonlinear_solver>
<name>basic_newton</name>
<type>Newton</type>
<max_iter>10000</max_iter>
<damping>1</damping>
<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>1</scaling>
</eigen>
</linear_solver>
</linear_solvers>
</OpenGeoSysProject>
1.12.0