v3.1.0

Release date: Jul 9, 2026

SHA-256 hash: d1ba65a167aab221c13f003507aba17f663c53af94fc1cd4a47408008329def1

Release notes:

• bugfix (grid solver, spectral_polarization): F_aim was stored for restart instead of P_aim
• bugfix (MSC.Marc): parsing of input file failed when using domain decomposition
• bugfix (processing, Rotation): Schmid matrix rotation was inverted
• bugfix (processing, Result): output of datasets with same name but different shape failed
• feature (grid solver): added solver variant for mechanics: spectral_Galerkin
• feature (grid solver): added functionality to simulate diffusion
• feature (grid solver): enable setting of temperature boundary conditions
• feature (grid solver): enable restart without existing result file
• feature (grid solver): enable restart from increment 0
• feature (mesh solver): allow to prescribe target displacement in load case definition
• feature (mesh solver): allow to prescribe force boundary conditions on nodes
• feature (mesh solver): support named mesh element groups in load case definition
• feature (mesh solver): support for quad and hex meshes
• feature (processing, grid_filters): enable regridding for combined stretch and shear deformation
• feature (processing, Result): added function to calculate resolved shear stress in the Result class
• usage (dislotwin): output twinning shear instead of twinned volume fraction
• usage (grid solver): use prefix modifier, e.g. dot_F instead of F_dot
• usage (grid solver): consistently use singular terms, i.e. boundary_condition
• usage (mesh and grid solver): executable names are all lowercase
• usage (mesh and grid solver): support for command completion on bash and zsh
• usage (mesh solver): improved convergence and iteration reporting
• compatibility: support libfyaml 0.9.1 to 0.9.6
• compatibility (grid and mesh solver): support PETSc 3.25.x (minimum is now 3.19.x)
• compatibility (grid and mesh solver): increased minimum GCC version to 12.1
• compatibility (grid and mesh solver): dropped support for Intel Parallel Studio XE in favor of Intel oneAPI
• compatibility (MSC.Marc): support MSC.Marc 2025.1 and 2025.2
• compatibility (MSC.Marc): build with libfyaml
• compatibility (processing): increased minimum Python version to 3.10
• compatibility (processing): read DREAM3D 8.0 files
• compatibility (processing): abandon use of multiprocessing module
• misc (grid solver): optional use of C++/Boost for CLI handling and VTI file read
• misc (processing): improved performance of several pre- and post-processing routines
• misc: new and improved material parameters

Full changelog: v3.0.0...v3.1.0