two_cracks_branch_pull.prj 7.48 KB
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<?xml version="1.0" encoding="ISO-8859-1"?>
<OpenGeoSysProject>
    <mesh>two_cracks_branch.vtu</mesh>
    <geometry>single_joint.gml</geometry>
    <processes>
        <process>
            <name>SD</name>
            <type>SMALL_DEFORMATION_WITH_LIE</type>
            <integration_order>2</integration_order>
            <dimension>2</dimension>
            <process_variables>
                <process_variable>displacement</process_variable>
                <process_variable>displacement_jump1</process_variable>
                <process_variable>displacement_jump2</process_variable>
            </process_variables>
            <constitutive_relation>
                <type>LinearElasticIsotropic</type>
                <youngs_modulus>E</youngs_modulus>
                <poissons_ratio>nu</poissons_ratio>
            </constitutive_relation>
            <fracture_model>
                <type>LinearElasticIsotropic</type>
                <normal_stiffness>Kn</normal_stiffness>
                <shear_stiffness>Ks</shear_stiffness>
                <penalty_aperture_cutoff>1e-5</penalty_aperture_cutoff>
                <tension_cutoff>1</tension_cutoff>
            </fracture_model>
            <fracture_properties>
                <material_id>1</material_id>
                <initial_aperture>aperture0</initial_aperture>
            </fracture_properties>
            <fracture_properties>
                <material_id>2</material_id>
                <initial_aperture>aperture0</initial_aperture>
            </fracture_properties>
            <secondary_variables>
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                <secondary_variable internal_name="sigma_xx" output_name="sigma_xx"/>
                <secondary_variable internal_name="sigma_yy" output_name="sigma_yy"/>
                <secondary_variable internal_name="sigma_xy" output_name="sigma_xy"/>
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            </secondary_variables>
        </process>
    </processes>
    <time_loop>
        <processes>
            <process ref="SD">
                <nonlinear_solver>basic_newton</nonlinear_solver>
                <convergence_criterion>
                    <type>Residual</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>1</repeat>
                            <delta_t>1.0</delta_t>
                        </pair>
                    </timesteps>
                </time_stepping>
            </process>
        </processes>
        <output>
            <type>VTK</type>
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            <prefix>two_cracks_branch_pull</prefix>
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            <timesteps>
                <pair>
                    <repeat>1</repeat>
                    <each_steps>10000000</each_steps>
                </pair>
            </timesteps>
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            <variables>
                <variable>displacement</variable>
                <variable>displacement_jump1</variable>
                <variable>displacement_jump2</variable>
                <variable>sigma_xx</variable>
                <variable>sigma_yy</variable>
                <variable>sigma_xy</variable>
            </variables>
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            <suffix>_ts_{:timestep}_t_{:time}</suffix>
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        </output>
    </time_loop>
    <parameters>
        <parameter>
            <name>E</name>
            <type>Constant</type>
            <value>170e6</value>
        </parameter>
        <parameter>
            <name>nu</name>
            <type>Constant</type>
            <value>0.22</value>
        </parameter>
        <parameter>
            <name>Kn</name>
            <type>Constant</type>
            <value>1e12</value>
        </parameter>
        <parameter>
            <name>Ks</name>
            <type>Constant</type>
            <value>1e9</value>
        </parameter>
        <parameter>
            <name>displacement0</name>
            <type>Constant</type>
            <values>0 0</values>
        </parameter>
        <parameter>
            <name>aperture0</name>
            <type>Constant</type>
            <value>1e-5</value>
        </parameter>
        <parameter>
            <name>load</name>
            <type>Constant</type>
            <value>7e+3</value>
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            <!--
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            <value>-7e+3</value>
-->
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        </parameter>
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        <parameter>
            <name>zero_u</name>
            <type>Constant</type>
            <value>0</value>
        </parameter>
    </parameters>
    <process_variables>
        <process_variable>
            <name>displacement</name>
            <components>2</components>
            <order>1</order>
            <initial_condition>displacement0</initial_condition>
            <boundary_conditions>
                <boundary_condition>
                    <geometrical_set>single_joint</geometrical_set>
                    <geometry>PLY_BOTTOM</geometry>
                    <type>Dirichlet</type>
                    <component>1</component>
                    <parameter>zero_u</parameter>
                </boundary_condition>
                <boundary_condition>
                    <geometrical_set>single_joint</geometrical_set>
                    <geometry>POINT0</geometry>
                    <type>Dirichlet</type>
                    <component>0</component>
                    <parameter>zero_u</parameter>
                </boundary_condition>
                <boundary_condition>
                    <geometrical_set>single_joint</geometrical_set>
                    <geometry>PLY_TOP</geometry>
                    <type>Neumann</type>
                    <component>1</component>
                    <parameter>load</parameter>
                </boundary_condition>
            </boundary_conditions>
        </process_variable>
        <process_variable>
            <name>displacement_jump1</name>
            <components>2</components>
            <order>1</order>
            <initial_condition>displacement0</initial_condition>
            <boundary_conditions>
            </boundary_conditions>
        </process_variable>
        <process_variable>
            <name>displacement_jump2</name>
            <components>2</components>
            <order>1</order>
            <initial_condition>displacement0</initial_condition>
            <boundary_conditions>
            </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>
            <lis>-i bicgstab -p jacobi -tol 1e-16 -maxiter 10000</lis>
            <eigen>
                <solver_type>CG</solver_type>
                <precon_type>DIAGONAL</precon_type>
                <max_iteration_step>10000</max_iteration_step>
                <error_tolerance>1e-16</error_tolerance>
            </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>