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========= |
\\ / 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.
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under the terms of the GNU General Public License as published by
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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
\*---------------------------------------------------------------------------*/
#ifndef solidDisplacement_H
#define solidDisplacement_H
#include "solid.H"
#include "solidDisplacementThermo.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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