| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2023-2026 OpenFOAM Foundation | |
| \\/ M anipulation | | |
| ------------------------------------------------------------------------------- | |
| License | |
| This file is part of OpenFOAM. | |
| OpenFOAM is free software: you can redistribute it and/or modify it | |
| under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| OpenFOAM is distributed in the hope that it will be useful, but WITHOUT | |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | |
| Class | |
| Foam::solvers::solidDisplacement | |
| Description | |
| Solver module for steady or transient segregated finite-volume solution of | |
| linear-elastic, small-strain deformation of a solid body, with optional | |
| thermal diffusion and thermal stresses. | |
| Solves for the displacement vector field D, also generating the stress | |
| tensor field sigma, including the thermal stress contribution if selected. | |
| SourceFiles | |
| solidDisplacement.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| namespace solvers | |
| { | |
| /*---------------------------------------------------------------------------*\ | |
| Class solidDisplacement Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class solidDisplacement | |
| : | |
| public solid | |
| { | |
| protected: | |
| // Thermophysical properties | |
| solidDisplacementThermo& thermo_; | |
| // Solution algorithm controls | |
| //- Switch for normal stress discretisation (required) | |
| // The compact form uses snGrad (more convergent, less accurate) | |
| // The non-compact form uses grad (less convergent, more accurate) | |
| Switch compactNormalStress; | |
| //- Maximum number of displacement/stress correctors per time-step | |
| // Defaults to 1 | |
| int nCorr; | |
| //- Convergence tolerance for the displacement/stress correctors | |
| // Defaults to 0 | |
| scalar convergenceTolerance; | |
| //- Acceleration factor for faster steady-state simulations | |
| // Applies over-relaxation to the displacement field after solution | |
| // Typically between 1 and 2, the optimal value is case dependent | |
| // and should be selected to maximise convergence rate while | |
| // maintaining stability. | |
| // Should be set lower for higher Poisson's ratios for stability. | |
| scalar accFac; | |
| // Kinematic properties | |
| //- Displacement field | |
| volVectorField D_; | |
| //- Young's modulus | |
| const volScalarField& E; | |
| //- Poisson's ratio | |
| const volScalarField& nu; | |
| //- Lame's coefficient | |
| const volScalarField mu; | |
| //- Lame's coefficient | |
| const volScalarField lambda; | |
| const volScalarField threeK; | |
| const volScalarField threeKalpha; | |
| // Cached temporary fields | |
| //- Stress field | |
| volSymmTensorField sigmaD; | |
| //- Divergence of the explicit part of the stress | |
| volInternalVectorField divSigmaExp; | |
| // Protected Member Functions | |
| //- Return true if the solver's dependencies have been modified | |
| virtual bool dependenciesModified() const; | |
| //- Read controls | |
| virtual bool read(); | |
| public: | |
| // Public Data | |
| //- Reference to the solid thermophysical properties | |
| const solidDisplacementThermo& thermo; | |
| //- Reference to the Displacement field | |
| const volVectorField& D; | |
| //- Runtime type information | |
| TypeName("solidDisplacement"); | |
| // Constructors | |
| //- Construct from region mesh | |
| solidDisplacement(fvMesh& mesh); | |
| //- Disallow default bitwise copy construction | |
| solidDisplacement(const solidDisplacement&) = delete; | |
| //- Destructor | |
| virtual ~solidDisplacement(); | |
| // Member Functions | |
| //- Called at the beginning of the PIMPLE loop | |
| virtual void prePredictor(); | |
| //- Construct and solve the energy equation, | |
| // convert to temperature | |
| // and update thermophysical and transport properties | |
| virtual void thermophysicalPredictor(); | |
| //- Construct and solve the displacement equation to obtain the stress | |
| virtual void pressureCorrector(); | |
| //- Correct the thermophysical transport modelling | |
| virtual void thermophysicalTransportCorrector(); | |
| //- Called after the PIMPLE loop at the end of the time-step | |
| virtual void postSolve(); | |
| // Member Operators | |
| //- Disallow default bitwise assignment | |
| void operator=(const solidDisplacement&) = delete; | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace solvers | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |