From 6f732c332ef6ad8b33980c033d6f25f8749a3641 Mon Sep 17 00:00:00 2001
From: tnagel <nagelt@tcd.ie>
Date: Fri, 3 Apr 2020 19:42:07 +0200
Subject: [PATCH] Added reduced version of Lubby2 and corresponding test.
---
MaterialLib/SolidModels/MFront/CMakeLists.txt | 3 +-
.../SolidModels/MFront/Lubby2mod.mfront | 80 ++++++
ProcessLib/SmallDeformation/Tests.cmake | 3 +-
.../Mechanics/Burgers/cube_1e0_mfront_mod.prj | 251 ++++++++++++++++++
...1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu | 3 +
...e_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu | 3 +
6 files changed, 341 insertions(+), 2 deletions(-)
create mode 100644 MaterialLib/SolidModels/MFront/Lubby2mod.mfront
create mode 100644 Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod.prj
create mode 100644 Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu
create mode 100644 Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu
diff --git a/MaterialLib/SolidModels/MFront/CMakeLists.txt b/MaterialLib/SolidModels/MFront/CMakeLists.txt
index a765275d31d..d1e05c8f850 100644
--- a/MaterialLib/SolidModels/MFront/CMakeLists.txt
+++ b/MaterialLib/SolidModels/MFront/CMakeLists.txt
@@ -19,7 +19,8 @@ mfront_behaviours_check_library(OgsMFrontBehaviour
MohrCoulombAbboSloanOrtho
StandardElasticityBrick
StandardElasticityBrickOrtho
- Lubby2)
+ Lubby2
+ Lubby2mod)
target_include_directories(MaterialLib_SolidModels_MFront
PUBLIC ThirdParty/MGIS/include)
diff --git a/MaterialLib/SolidModels/MFront/Lubby2mod.mfront b/MaterialLib/SolidModels/MFront/Lubby2mod.mfront
new file mode 100644
index 00000000000..7e14479a0b3
--- /dev/null
+++ b/MaterialLib/SolidModels/MFront/Lubby2mod.mfront
@@ -0,0 +1,80 @@
+
+@DSL Implicit;
+@Behaviour Lubby2mod;
+@Author Thomas Nagel, Thomas Helfer;
+@Description {Lubby2 model for stationary
+and transient creep based on Burgers
+rheological model.
+Reduced implementation.
+};
+
+@Algorithm NewtonRaphson;
+@MaximumNumberOfIterations 100;
+
+@Epsilon 1.e-14;
+@Theta 1.0;
+
+@ModellingHypotheses{".+"};
+@Brick StandardElasticity;
+@RequireStiffnessTensor<UnAltered>;
+
+// Intercept of yield function
+@MaterialProperty real GK0;
+GK0.setEntryName("KelvinShearModulus");
+@MaterialProperty real etaK0;
+etaK0.setEntryName("KelvinViscosity");
+@MaterialProperty real etaM0;
+etaM0.setEntryName("MaxwellViscosity");
+@MaterialProperty real mK;
+mK.setEntryName("KelvinElasticParameter");
+@MaterialProperty real mvK;
+mvK.setEntryName("KelvinViscoParameter");
+@MaterialProperty real mvM;
+mvM.setEntryName("MaxwellViscoParameter");
+
+@AuxiliaryStateVariable Stensor epsK;
+epsK.setEntryName("KelvinStrain");
+
+//! increment of the Kelvin strain
+@LocalVariable Stensor depsK;
+//! increment of the Maxwell strain
+@LocalVariable Stensor depsM;
+
+@Integrator {
+
+ const auto seq = sigmaeq(sig);
+ const auto iseq = 1. / std::max(seq, 1.e-14 * D(0, 0));
+ const auto s = deviator(sig);
+ constexpr auto Pdev = Stensor4::K();
+
+ const auto etaK = etaK0 * std::exp(mvK * seq);
+ const auto etaM = etaM0 * std::exp(mvM * seq);
+ const auto GK = GK0 * std::exp(mK * seq);
+
+ // calculate Kelvin strain residual
+ const auto etaK_impl = etaK + dt * GK * theta;
+ depsK = dt / (2. * etaK_impl) * (s - 2 * GK * epsK);
+
+ // calculate Maxwell strain residual
+ depsM = dt / (2 * etaM) * s;
+
+ // residuals
+ feel += depsM + depsK;
+
+ // Jacobian
+ const auto dseq_ddeel = 3. * iseq / 2. * s | (Pdev * D);
+ const auto detaK_ddeel = etaK * mvK * dseq_ddeel;
+ const auto detaM_ddeel = etaM * mvM * dseq_ddeel;
+ const auto dGK_ddeel = GK * mK * dseq_ddeel;
+ //
+ dfeel_ddeel +=
+ -(dt / (2 * etaK_impl * etaK_impl) * (s - 2 * GK * epsK) ^ detaK_ddeel) +
+ (dt / (2 * etaK_impl) * Pdev * D) - dt / etaK_impl * (epsK ^ dGK_ddeel) -
+ dt / (2 * etaK_impl * etaK_impl) * dt * theta *
+ ((s - 2 * GK * epsK) ^ dGK_ddeel) -
+ (dt / (2 * etaM * etaM) * s ^ detaM_ddeel) + (dt / (2 * etaM) * Pdev * D);
+}
+
+@UpdateAuxiliaryStateVariables {
+ epsK += depsK;
+} // end of @UpdateAuxiliaryStateVariables
diff --git a/ProcessLib/SmallDeformation/Tests.cmake b/ProcessLib/SmallDeformation/Tests.cmake
index 08aad5375cc..a804d38feb6 100644
--- a/ProcessLib/SmallDeformation/Tests.cmake
+++ b/ProcessLib/SmallDeformation/Tests.cmake
@@ -61,6 +61,7 @@ if (OGS_USE_MFRONT)
OgsTest(PROJECTFILE Mechanics/Linear/MFront/square_1e0_orthotropic_45xy_z.prj)
OgsTest(PROJECTFILE Mechanics/Linear/MFront/square_1e0_orthotropic_y-xz.prj)
OgsTest(PROJECTFILE Mechanics/Burgers/cube_1e0_mfront.prj)
+ OgsTest(PROJECTFILE Mechanics/Burgers/cube_1e0_mfront_mod.prj)
# Linear elastic, no internal state variables, no external state variables.
AddTest(
NAME Mechanics_SDL_disc_with_hole_mfront
@@ -225,4 +226,4 @@ AddTest(
DIFF_DATA
output_pcs_0_ts_1_t_1.000000.vtu output_pcs_0_ts_1_t_1.000000.vtu displacement displacement 0 1e-12
output_pcs_0_ts_1_t_1.000000.vtu output_pcs_0_ts_1_t_1.000000.vtu principal_stress_values principal_stress_values 0 1e-10
-)
\ No newline at end of file
+)
diff --git a/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod.prj b/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod.prj
new file mode 100644
index 00000000000..5f996310863
--- /dev/null
+++ b/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod.prj
@@ -0,0 +1,251 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<OpenGeoSysProject>
+ <mesh>cube_1x1x1_hex_1e0.vtu</mesh>
+ <geometry>cube_1x1x1.gml</geometry>
+ <processes>
+ <process>
+ <name>SD</name>
+ <type>SMALL_DEFORMATION</type>
+ <integration_order>2</integration_order>
+ <constitutive_relation>
+ <type>MFront</type>
+ <behaviour>Lubby2mod</behaviour>
+ <material_properties>
+ <material_property name="YoungModulus" parameter="YoungModulus"/>
+ <material_property name="PoissonRatio" parameter="PoissonRatio"/>
+ <material_property name="KelvinShearModulus" parameter="GK0"/>
+ <material_property name="KelvinViscosity" parameter="etaK0"/>
+ <material_property name="MaxwellViscosity" parameter="etaM0"/>
+ <material_property name="KelvinElasticParameter" parameter="mK"/>
+ <material_property name="MaxwellViscoParameter" parameter="mvM"/>
+ <material_property name="KelvinViscoParameter" parameter="mvK"/>
+ </material_properties>
+ </constitutive_relation>
+ <solid_density>rho_sr</solid_density>
+ <specific_body_force>0 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_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-15</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>0.0001</delta_t>
+ </pair>
+ <pair>
+ <repeat>100</repeat>
+ <delta_t>0.01</delta_t>
+ </pair>
+ </timesteps>
+ </time_stepping>
+ </process>
+ </processes>
+ <output>
+ <type>VTK</type>
+ <prefix>cube_1e0_mfront_mod</prefix>
+ <timesteps>
+ <pair>
+ <repeat>1</repeat>
+ <each_steps>1</each_steps>
+ </pair>
+ <pair>
+ <repeat>1</repeat>
+ <each_steps>10000000</each_steps>
+ </pair>
+ </timesteps>
+ <variables>
+ <variable>displacement</variable>
+ <variable>sigma</variable>
+ </variables>
+ </output>
+ </time_loop>
+ <parameters>
+ <parameter>
+ <name>GK0</name>
+ <type>Constant</type>
+ <value>0.8</value>
+ </parameter>
+ <parameter>
+ <name>etaK0</name>
+ <type>Constant</type>
+ <value>0.5</value>
+ </parameter>
+ <parameter>
+ <name>YoungModulus</name>
+ <type>Constant</type>
+ <value>1.8</value>
+ </parameter>
+ <parameter>
+ <name>PoissonRatio</name>
+ <type>Constant</type>
+ <value>0.125</value>
+ </parameter>
+ <parameter>
+ <name>etaM0</name>
+ <type>Constant</type>
+ <value>0.5</value>
+ </parameter>
+ <parameter>
+ <name>mK</name>
+ <type>Constant</type>
+ <value>-0.2</value>
+ </parameter>
+ <parameter>
+ <name>mvK</name>
+ <type>Constant</type>
+ <value>-0.2</value>
+ </parameter>
+ <parameter>
+ <name>mvM</name>
+ <type>Constant</type>
+ <value>-0.3</value>
+ </parameter>
+ <parameter>
+ <name>rho_sr</name>
+ <type>Constant</type>
+ <value>1</value>
+ </parameter>
+ <parameter>
+ <name>displacement0</name>
+ <type>Constant</type>
+ <values>0 0 0</values>
+ </parameter>
+ <parameter>
+ <name>neumann_force</name>
+ <type>Constant</type>
+ <values>0.01</values>
+ </parameter>
+ <parameter>
+ <name>dirichlet0</name>
+ <type>Constant</type>
+ <value>0</value>
+ </parameter>
+ </parameters>
+ <process_variables>
+ <process_variable>
+ <name>displacement</name>
+ <components>3</components>
+ <order>1</order>
+ <initial_condition>displacement0</initial_condition>
+ <boundary_conditions>
+ <!-- fixed boundaries -->
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>left</geometry>
+ <type>Dirichlet</type>
+ <component>1</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>back</geometry>
+ <type>Dirichlet</type>
+ <component>1</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>front</geometry>
+ <type>Dirichlet</type>
+ <component>0</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>front</geometry>
+ <type>Dirichlet</type>
+ <component>1</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>right</geometry>
+ <type>Dirichlet</type>
+ <component>1</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ <!-- force -->
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>back</geometry>
+ <type>Neumann</type>
+ <component>0</component>
+ <parameter>neumann_force</parameter>
+ </boundary_condition>
+ <!-- fix front for the 3d case -->
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>top</geometry>
+ <type>Dirichlet</type>
+ <component>2</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ <boundary_condition>
+ <geometrical_set>cube_1x1x1_geometry</geometrical_set>
+ <geometry>bottom</geometry>
+ <type>Dirichlet</type>
+ <component>2</component>
+ <parameter>dirichlet0</parameter>
+ </boundary_condition>
+ </boundary_conditions>
+ </process_variable>
+ </process_variables>
+ <nonlinear_solvers>
+ <nonlinear_solver>
+ <name>basic_newton</name>
+ <type>Newton</type>
+ <max_iter>4</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>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>
+ <test_definition>
+ <vtkdiff>
+ <file>cube_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu</file>
+ <field>displacement</field>
+ <absolute_tolerance>5e-16</absolute_tolerance>
+ <relative_tolerance>1e-16</relative_tolerance>
+ </vtkdiff>
+ <vtkdiff>
+ <file>cube_1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu</file>
+ <field>displacement</field>
+ <absolute_tolerance>5e-16</absolute_tolerance>
+ <relative_tolerance>1e-16</relative_tolerance>
+ </vtkdiff>
+ </test_definition>
+</OpenGeoSysProject>
diff --git a/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu b/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu
new file mode 100644
index 00000000000..e996fa3b051
--- /dev/null
+++ b/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9dad753d851bbe651cd165f809eb49627553be68e13e5926e2ca012aadadabd3
+size 4958
diff --git a/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu b/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu
new file mode 100644
index 00000000000..aa613d73b42
--- /dev/null
+++ b/Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9b99e8ab5bcfebe29647ec52a0b198a4c0f02ef6e1d2d79ec99d82e4d7e15809
+size 4954
--
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