On this page we provide a summary of the main API changes, new features and examples for each release of Ratel.
Update strain energy function to the convex form for both Neo-Hookean and Mooney-Rivlin models.
Add mixed linear elasticity and Neo-Hookean hyperelastic models for incompressible materials.
Add pressure boundary loading which is caused by liquids or gases on the surface of the solid structure.
Add flexible clamp, traction, and slip boundary conditions with more complex time variance during a quasistatic or dynamic simulation.
Ratel[TS,SNES,KSP]SetupPCfor better accuracy.
RatelMultigridType, and some function names for consistency.
Refactor p-multigrid support as registered PETSc
PC; this change generated various API and command line option changes. See the
Using Ratelsection for the updated command line options.
Fixes to QFunctions and documentation for clarity and consistency.
Updates to setup to reduce setup time.
Updates to local vector usage to reduce memory footprint.
V0.2.1 (12 January 2023)#
Bugfix to make tet based tests optional in the test suite.
V0.2.0 (10 January 2023)#
Expanded features and material models.
RatelComputeSurfaceForcesfor computing final forces on surfaces, identified by DMPlex face id number.
Add support for computing Jacobians from strain energy density functional from residual evaluation via Automatic Differentiation with Enzyme-AD. Neo-Hookean material models provided in current and initial configuration.
Add support for platen boundary condition based upon Nitsche’s method.
Add support for restart from saved binaries of state vectors.
Update names and command line arguments for material models for consistency.
Use PETSc option
ymloption in tests and examples; removed
Docker images built and tested as part of CI process for latest
Update Boolean arguments
-ts_monitor_diagnostic_quantitiesto use viewer type.
Remove command line option
-output_dir; this functionality is provided with setting the output filepath for the viewer via
RatelVectorViewin favor of base PETSc functionality.
Internal refactor around
RatelMaterial, an object representing a region of the mesh given by a material model with consistent physical parameters. External behavior was not affected by this refactor.
v0.1.2 (15 April 2022)#
Bugfix for install paths in makefile.
v0.1.1 (14 April 2022)#
Bugfix for Mass QFunction source file relative path.
v0.1 (11 April 2022)#
Initial Ratel API. The Ratel solid mechanics library is based upon libCEED and PETSc. libCEED v0.10.1 or later and PETSc v3.17 or later is required.