4C version v2026.3.0 · 4C-multiphysics 4C · Discussion #2198 · GitHub

c-p-schmidt
Aug 19, 2026
Maintainer

What's Changed

Breaking Changes

Renaming and some input refactoring in viscoelasthyper toolbox by @bgoderbauer in Renaming and some input refactoring in viscoelasthyper toolbox #2005
Minor rework of MAT_electrode by @c-p-schmidt in Minor rework of MAT_electrode #2034
Remove custom implemented functions from elchsinglemat by @c-p-schmidt in Remove custom implemented functions from elchsinglemat #2042
Move poroelast to vtk output by @c-p-schmidt in Move poroelast to vtk output #2057
Remove custom implemented functions: Part 2 by @c-p-schmidt in Remove custom implemented functions: Part 2 #2061
Move heatflux and tempgrad to vtk output by @engstlerL in Move heatflux and tempgrad to vtk output #2062
Remove custom implemented functions: Part 3 by @c-p-schmidt in Remove custom implemented functions: Part 3 #2064
Remove thermo trait from thermo solid trait by @rjoussen in Remove thermo trait from thermo solid trait #2075
Remove custom implemented functions: Part 4 by @c-p-schmidt in Remove custom implemented functions: Part 4 #2079
Remove NUMMAT from MIX_Constituent_ElastHyper by @lauraengelhardt in Remove NUMMAT from MIX_Constituent_ElastHyper #2080
Group passive/active material parameters and refactor COMBO muscle model by @lauraengelhardt in Group passive/active material parameters and refactor COMBO muscle model #2081

Major changes

Add performance testing framework by @amgebauer in Add performance testing framework #1988
Generate performance report by @amgebauer in Generate performance report #2020
Collect benchmark test data and generate report by @amgebauer in Collect benchmark test data and generate report #2039
Input: support name-based element block definition by @rjoussen in Input: support name-based element block definition #1971
Add kokkosparallel docker and workflow by @PhilipOesterlePekrun in Add kokkosparallel docker and workflow #2162
Enable using Kokkos with CUDA backend for MIRCO and in general by @PhilipOesterlePekrun in Enable using Kokkos with CUDA backend for MIRCO and in general #2012
Add cmake preset to compile 4C on Darwin by @vryy in Add cmake preset to compile 4C on Darwin #1795

Dependency changes

Patch Release of Trilinos - 16.2.1 by @jeremylt in Patch Release of Trilinos - 16.2.1 #2133

Miscellaneous

Move scatra input from inpar to scatra by @maxiludwig in Move scatra input from inpar to scatra #1996
Improve the error message when using DESIGN ** NEUMANN CONDITIONS: with TYPE: "orthopressure" by @lkoeglmeier in Improve the error message when using DESIGN ** NEUMANN CONDITIONS: with TYPE: "orthopressure" #1999
Replace raw pointer usage with std::span in Map class by @dharinib98 in Replace raw pointer usage with std::span in Map class #1977
Remove master/slave in beaminteraction by @davidrudlstorfer in Remove master/slave in beaminteraction #1998
Move xfem input from inpar to xfem by @maxiludwig in Move xfem input from inpar to xfem #1997
Move s2i input from inpar to scatra by @maxiludwig in Move s2i input from inpar to scatra #2001
Add performance test for monolithic solid scatra interaction by @c-p-schmidt in Add performance test for monolithic solid scatra interaction #2004
Fix reuse of NOX::Nln::Adapter by resetting state by @maxiludwig in Fix reuse of NOX::Nln::Adapter by resetting state #2003
Node numbering in node set printout when external mesh files are read by @ischeider in Node numbering in node set printout when external mesh files are read #1980
Slightly increase test tolerance of failing embedded mesh test by @bgoderbauer in Slightly increase test tolerance of failing embedded mesh test #2011
Fix distance threshold bug ScalarInterp by @dragos-ana in Fix distance threshold bug ScalarInterp #2010
[TSI] Fix solver increment handling in partitioned solver by @rjoussen in [TSI] Fix solver increment handling in partitioned solver #2022
Introduce central manager for viscoelastic states by @bgoderbauer in Introduce central manager for viscoelastic states #2018
Add temperature derivative evaluation to refJC material by @rjoussen in Add temperature derivative evaluation to refJC material #2016
Update tolerance in beam test by @rjoussen in Update tolerance in beam test #2026
[beaminteraction] Assemble penalty contribution into FE matrix by @maxfirmbach in [beaminteraction] Assemble penalty contribution into FE matrix #2028
Prepare viscoplastic factor for thermo-coupling by @rjoussen in Prepare viscoplastic factor for thermo-coupling #2015
Fix 2D solid output of out-of-plane components by @bennoschoenstein in Fix 2D solid output of out-of-plane components #2027
Minor rework of ssi solvers by @c-p-schmidt in Minor rework of ssi solvers #2031
Add more verbose error message to particle code by @ppraegla in Add more verbose error message to particle code #2030
Add performance result badges to the README by @c-p-schmidt in Add performance result badges to the README #2033
Add Windkessel terminal unit in 1D pipe flow by @engstlerL in Add Windkessel terminal unit in 1D pipe flow #2023
Clean parallel issues by @georghammerl in Clean parallel issues #2029
Add possibility to use functions for bodyforces in porofluid_pressure_based* problems by @lkoeglmeier in Add possibility to use functions for bodyforces in porofluid_pressure_based* problems #2035
Introduce non-local growth remodeling by @tuchpaul in Introduce non-local growth remodeling #2019
Minor rework of global_full by @c-p-schmidt in Minor rework of global_full #2038
[MultSplit Material] Add thermal stress evaluation helper by @rjoussen in [MultSplit Material] Add thermal stress evaluation helper #2037
Add benchmark result badge to the README by @c-p-schmidt in Add benchmark result badge to the README #2043
Add element timing by @LaSi5002 in Add element timing #2025
Enable monitor dbc in monolithic solvers by @rjoussen in Enable monitor dbc in monolithic solvers #2044
Enable possibility to use functions for body force contributions in porofluid_pressure_based_elast* framework by @lkoeglmeier in Enable possibility to use functions for body force contributions in porofluid_pressure_based_elast* framework #2040
Enable inelastic growth in impl-fiber by @tuchpaul in Enable inelastic growth in impl-fiber #2052
Add a completion-oriented schema wrapper by @rjoussen in Add a completion-oriented schema wrapper #2006
chore: remove old plasticity inpar by @davidrudlstorfer in chore: remove old plasticity inpar #2056
Further infrastructure improvements for viscoelastic materials by @bgoderbauer in Further infrastructure improvements for viscoelastic materials #2053
[Particle] Fix probe for the message with the size tag by @vovannikov in [Particle] Fix probe for the message with the size tag #2058
Introduce output verbosity levels in reduced lung by @maxiludwig in Introduce output verbosity levels in reduced lung #2060
[Particle] Reduce complexity of Particle::PDNeighborPairs::communicate_bond_list() by @vovannikov in [Particle] Reduce complexity of Particle::PDNeighborPairs::communicate_bond_list() #2063
Rename master/slave to source/target in adapter by @lauraengelhardt in Rename master/slave to source/target in adapter #2055
Allow vtu mesh import for all beam types in 4C by @isteinbrecher in Allow vtu mesh import for all beam types in 4C #2071
Adapt the workflow schedules by @c-p-schmidt in Adapt the workflow schedules #2072
Rename master slave in core by @lauraengelhardt in Rename master slave in core #2066
Add thermal effects to the viscoplastic factor by @rjoussen in Add thermal effects to the viscoplastic factor #2041
Refactor central infrastructure for viscoelastic materials by @bgoderbauer in Refactor central infrastructure for viscoelastic materials #2073
Monolithic non-local stimulus by @tuchpaul in Monolithic non-local stimulus #2067
Try fix randomly failing sti test by @c-p-schmidt in Try fix randomly failing sti test #2077
Implement quasilinear generalized Maxwell model for structural dynamics by @bgoderbauer in Implement quasilinear generalized Maxwell model for structural dynamics #2076
Futher renaming of master/slave to source/target by @lauraengelhardt in Futher renaming of master/slave to source/target #2078
Fix build error on lnm cluster thought by @c-p-schmidt in Fix build error on lnm cluster thought #2085
feat: beaminteraction -> potential: add potential reduction functions by @davidrudlstorfer in feat: beaminteraction -> potential: add potential reduction functions #2088
Update the lnm cluster presets to actual current capabilities at the cluster bruteforce by @c-p-schmidt in Update the lnm cluster presets to actual current capabilities at the cluster bruteforce #2087
Fix sign in 4 ele Maxwell residual by @maxiludwig in Fix sign in 4 ele Maxwell residual #2089
Clean-up solid materials by @lauraengelhardt in Clean-up solid materials #2090
Flush error output before MPI abort in main by @rjoussen in Flush error output before MPI abort in main #2092
Preset: Update IMCS cluster preset with vtk by @reginabuehler in Preset: Update IMCS cluster preset with vtk #2096
Further cleanup in preparation for the Adaptive Estimate Interpolation algorithm by @dragos-ana in Further cleanup in preparation for the Adaptive Estimate Interpolation algorithm #2082
Add thermal effects to the multiplicative split material by @rjoussen in Add thermal effects to the multiplicative split material #2083
Correct invalid names in journal files by @c-p-schmidt in Correct invalid names in journal files #2086
Fix circular references in anisotropy framework by @lauraengelhardt in Fix circular references in anisotropy framework #2094
Add 3D solid superposition material by @lauraengelhardt in Add 3D solid superposition material #2095
Cleanup of scatra ele boundary calc methods by @c-p-schmidt in Cleanup of scatra ele boundary calc methods #2099
Move inpar_structure to structure_new_input by @maxiludwig in Move inpar_structure to structure_new_input #2103
Validate output argument contains a prefix by @maxiludwig in Validate output argument contains a prefix #2106
Rename master/slave to target/source in poro, structure, and TSI modules by @lauraengelhardt in Rename master/slave to target/source in poro, structure, and TSI modules #2101
Change solver from Superlu to MUMPS for failing beam test by @c-p-schmidt in Change solver from Superlu to MUMPS for failing beam test #2107
Tensor migration by @tuchpaul in Tensor migration #2084
Enable vtk based output in red-airways by @lkoeglmeier in Enable vtk based output in red-airways #2100
Fix monitor_dbc DOF iteration in 2D by @bennoschoenstein in Fix monitor_dbc DOF iteration in 2D #2036
[Particle] Cache senders and receivers of the refreshed particles by @vovannikov in [Particle] Cache senders and receivers of the refreshed particles #2074
feat: beaminteraction -> potential: add potential reduction distributed endpoint moment compensation by @davidrudlstorfer in feat: beaminteraction -> potential: add potential reduction distributed endpoint moment compensation #2091
[beaminteraction]Dual Hermite shapefunctions for Lagrange Multipliers by @dharinib98 in [beaminteraction]Dual Hermite shapefunctions for Lagrange Multipliers #2009
Fix get_comm usage in reduced_lung by @rjoussen in Fix get_comm usage in reduced_lung #2119
Fix gmsh node reordering for corner cases by @rjoussen in Fix gmsh node reordering for corner cases #2118
Adaptive endpoint quadrature by @davidrudlstorfer in Adaptive endpoint quadrature #2120
Remove post_output() by @rjoussen in Remove post_output() #2125
Silence Clang-23 Unused Warnings by @jeremylt in Silence Clang-23 Unused Warnings #2127
Refactor the drucker prager model to use tensors instead of matrices by @ischeider in Refactor the drucker prager model to use tensors instead of matrices #2007
[Particle] Do not use ParticleObjShrdPtr for commicating particle data by @vovannikov in [Particle] Do not use ParticleObjShrdPtr for commicating particle data #2117
[beaminteraction] Allow output of energy in beam-to-solid volume mortar simulations by @isteinbrecher in [beaminteraction] Allow output of energy in beam-to-solid volume mortar simulations #2135
[Particle] Make sdata const and return rdata in particle utils by @vovannikov in [Particle] Make sdata const and return rdata in particle utils #2141
[beaminteraction]Correct dual hermite shapefunctions by @dharinib98 in [beaminteraction]Correct dual hermite shapefunctions #2128
[geometric search] Allow beam bounding volume based on beams surface by @isteinbrecher in [geometric search] Allow beam bounding volume based on beams surface #2140
[beaminteraction] Update beam-solid preconditioner config by @maxfirmbach in [beaminteraction] Update beam-solid preconditioner config #2143
[beaminteraction] Post filter penalty contribution by @maxfirmbach in [beaminteraction] Post filter penalty contribution #2144
A hybrid Ogden-type material model with compression-tension asymmetry control by @lauraengelhardt in A hybrid Ogden-type material model with compression-tension asymmetry control #2109
Remove unused code by @rjoussen in Remove unused code #2151
Update contributing guidelines w.r.t. AI-assisted contributions by @lauraengelhardt in Update contributing guidelines w.r.t. AI-assisted contributions #2156
Move fluid input by @davidrudlstorfer in Move fluid input #2150
Find libbacktrace by name, not hardcoded suffix by @georghammerl in Find libbacktrace by name, not hardcoded suffix #2160
Update PR template with disclosure of AI assistance by @lauraengelhardt in Update PR template with disclosure of AI assistance #2158
Preparations for fluid output to vtk based by @c-p-schmidt in Preparations for fluid output to vtk based #2163
Migrate fluid-hdg output to vtk-based output by @c-p-schmidt in Migrate fluid-hdg output to vtk-based output #2164
Migrate fluid-poro output to vtk-based output by @c-p-schmidt in Migrate fluid-poro output to vtk-based output #2165
Fix cut kernel comparison by @vryy in Fix cut kernel comparison #2161
Move fluid external forces and fluid hdg output by @c-p-schmidt in Move fluid external forces and fluid hdg output #2167
Add dynamic rebalance to structure problems by @LaSi5002 in Add dynamic rebalance to structure problems #2108
Adapt fluid conditions output by @c-p-schmidt in Adapt fluid conditions output #2170
[bugfix] Fix two flaws regarding strain energy output in the hyperelastic framework by @ischeider in [bugfix] Fix two flaws regarding strain energy output in the hyperelastic framework #2147
Reduced lung vtu input by @maxiludwig in Reduced lung vtu input #2166
Add a performance test for reduced-lung by @maxiludwig in Add a performance test for reduced-lung #2142
Particle Writable State Access by @jeremylt in Particle Writable State Access #2171
Insert Global::Problem at porofluidelast/-scatra algorithm boundary by @bgoderbauer in Insert Global::Problem at porofluidelast/-scatra algorithm boundary #2169
Detect inconsistent fiber entry and throw an error by @ischeider in Detect inconsistent fiber entry and throw an error #2168
Particle: Clean up THROW vs ASSERT by @jeremylt in Particle: Clean up THROW vs ASSERT #2178
Particle Use Enum Class by @jeremylt in Particle Use Enum Class #2176
Migrate output of FluidImplicitTimeInt to vtk-based output by @c-p-schmidt in Migrate output of FluidImplicitTimeInt to vtk-based output #2172
Support inhomogenous element blocks (in input only) by @rjoussen in Support inhomogenous element blocks (in input only) #2123
Fix cell_block id access in reduced lung by @rjoussen in Fix cell_block id access in reduced lung #2181
Docker update more robust dependencies hash by @ppraegla in Docker update more robust dependencies hash #2175
Add structured tree terminal unit by @engstlerL in Add structured tree terminal unit #2180
Remove redundant definition from input file by @c-p-schmidt in Remove redundant definition from input file #2185
[Actions] Temporarily disable kokkoscuda_build workflow due to ccache issue by @PhilipOesterlePekrun in [Actions] Temporarily disable kokkoscuda_build workflow due to ccache issue #2186
[Particle] Improve bin weight estimate by @vovannikov in [Particle] Improve bin weight estimate #2145
Clean-up 1D pipeflow by @engstlerL in Clean-up 1D pipeflow #2195

Contributors

List of all contributors who authored, committed, reviewed, or commented on accepted pull requests for this release.

New Contributors

@LaSi5002 made their first contribution in Add element timing #2025

Thanks to first-time contributors to 4C!

Full Changelog: v2026.2.0...v2026.3.0

This discussion was created from the release 4C version v2026.3.0.

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