oofem::StructuralCrossSection Class Reference

Abstract base class for all structural cross section models. More...

#include <structuralcrosssection.h>

Inheritance diagram for oofem::StructuralCrossSection:

Collaboration diagram for oofem::StructuralCrossSection:

Public Member Functions
	StructuralCrossSection (int n, Domain *d)
	Constructor. More...
virtual	~StructuralCrossSection ()
	Destructor. More...
virtual void	giveFirstPKStresses (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedFIncrement, TimeStep *tStep)=0
	Computes the First Piola-Kirchoff stress vector for a given deformation gradient and integration point. More...
virtual void	giveCauchyStresses (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedFIncrement, TimeStep *tStep)=0
	Computes the Cauchy stress vector for a given increment of deformation gradient and given integration point. More...
virtual void	giveEshelbyStresses (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedvF, TimeStep *tStep)
	Computes the Eshelby stress vector. More...
virtual void	giveStiffnessMatrix_dPdF (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Computes the material stiffness matrix dPdF of receiver in a given integration point, respecting its history. More...
virtual void	giveStiffnessMatrix_dCde (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Computes the material stiffness matrix dCde of receiver in a given integration point, respecting its history. More...
virtual void	giveCharMaterialStiffnessMatrix (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Computes the stiffness matrix of receiver in given integration point, respecting its history. More...
virtual void	give2dBeamStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Computes the stiffness matrix for 2d beams. More...
virtual void	give3dBeamStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Computes the stiffness matrix for 2d beams. More...
virtual void	give3dBeamSubSoilStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)
	Method for computing subsoil stiffness matrix for 2d beams. More...
virtual void	give2dPlateStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Method for computing 2d plate stiffness matrix. More...
virtual void	give3dShellStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Method for computing 3d shell stiffness matrix. More...
virtual void	give3dDegeneratedShellStiffMtrx (FloatMatrix &answer, MatResponseMode rMode, GaussPoint *gp, TimeStep *tStep)
	Method for computing 3d shell stiffness matrix on degenerated shell elements. More...
virtual void	giveMembraneRotStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Method for computing membrane stiffness matrix with added drilling stiffness. More...
virtual void	give2dPlateSubSoilStiffMtrx (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Method for computing subsoil stiffness matrix for plates. More...
virtual FloatArray *	imposeStressConstrainsOnGradient (GaussPoint *gp, FloatArray *gradientStressVector3d)
	Returns modified gradient of stress vector, which is used to bring stresses back to yield surface. More...
virtual FloatArray *	imposeStrainConstrainsOnGradient (GaussPoint *gp, FloatArray *gradientStressVector3d)
	Returns modified gradient of strain vector, which is used to compute plastic strain increment. More...
virtual int	testCrossSectionExtension (CrossSectExtension ext)
	Returns nonzero, if receiver implements required extension. More...
virtual Material *	giveMaterial (IntegrationPoint *ip)
	Returns the material associated with the GP. More...
virtual void	createMaterialStatus (GaussPoint &iGP)=0
virtual int	checkConsistency ()=0
	Allows programmer to test some internal data, before computation begins. More...
virtual Interface *	giveMaterialInterface (InterfaceType t, IntegrationPoint *ip)
virtual bool	isCharacteristicMtrxSymmetric (MatResponseMode mode)=0
	Check for symmetry of stiffness matrix. More...
void	giveRealStresses (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)
	Computes the real stress vector for given strain and integration point. More...
virtual void	giveRealStress_3d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)=0
virtual void	giveRealStress_3dDegeneratedShell (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)
virtual void	giveRealStress_PlaneStrain (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)=0
virtual void	giveRealStress_PlaneStress (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)=0
virtual void	giveRealStress_1d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)=0
virtual void	giveRealStress_Warping (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)=0
virtual void	giveStiffnessMatrix_3d (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
	Method for computing the stiffness matrix. More...
virtual void	giveStiffnessMatrix_PlaneStress (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
virtual void	giveStiffnessMatrix_PlaneStrain (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
virtual void	giveStiffnessMatrix_1d (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)=0
virtual void	giveGeneralizedStress_Beam2d (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)=0
	Computes the generalized stress vector for given strain and integration point. More...
virtual void	giveGeneralizedStress_Beam3d (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)=0
virtual void	giveGeneralizedStress_Plate (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)=0
virtual void	giveGeneralizedStress_Shell (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)=0
virtual void	giveGeneralizedStress_MembraneRot (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)=0
virtual void	giveGeneralizedStress_PlateSubSoil (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)=0
virtual void	giveGeneralizedStress_3dBeamSubSoil (FloatArray &answer, GaussPoint *gp, const FloatArray &generalizedStrain, TimeStep *tStep)
Public Member Functions inherited from oofem::CrossSection
	CrossSection (int n, Domain *d)
	Constructor. More...
virtual	~CrossSection ()
	Destructor. More...
int	giveSetNumber () const
virtual bool	hasProperty (CrossSectionProperty a)
	Returns true if the dictionary contains the requested property. More...
virtual double	give (CrossSectionProperty a, GaussPoint *gp)
	Returns the value of cross section property at given point. More...
virtual double	give (CrossSectionProperty a, const FloatArray &coords, Element *elem, bool local=true)
	Returns the value of cross section property at given point (belonging to given element). More...
virtual double	give (int aProperty, GaussPoint *gp)
	Returns the value of cross section property. More...
virtual void	printYourself ()
	Prints receiver state on stdout. Useful for debugging. More...
virtual int	setupIntegrationPoints (IntegrationRule &irule, int npoints, Element *element)
	Sets up integration rule for the given element. More...
virtual int	setupIntegrationPoints (IntegrationRule &irule, int npointsXY, int npointsZ, Element *element)
	Sets up integration rule for the given element. More...
virtual int	giveIPValue (FloatArray &answer, GaussPoint *ip, InternalStateType type, TimeStep *tStep)
	Returns the integration point corresponding value in Reduced form. More...
virtual int	packUnknowns (DataStream &buff, TimeStep *tStep, GaussPoint *ip)=0
	Pack all necessary data of integration point (according to element parallel_mode) into given communication buffer. More...
virtual int	unpackAndUpdateUnknowns (DataStream &buff, TimeStep *tStep, GaussPoint *ip)=0
	Unpack and updates all necessary data of given integration point (according to element parallel_mode) into given communication buffer. More...
virtual int	estimatePackSize (DataStream &buff, GaussPoint *ip)=0
	Estimates the necessary pack size to hold all packed data of receiver. More...
virtual double	predictRelativeComputationalCost (GaussPoint *ip)
	Returns the weight representing relative computational cost of receiver The reference cross section is integral model in plane stress. More...
virtual double	giveRelativeSelfComputationalCost ()
	Returns the weight representing relative computational cost of receiver The reference element is integral model in plane stress. More...
virtual double	predictRelativeRedistributionCost (GaussPoint *gp)
virtual IRResultType	initializeFrom (InputRecord *ir)
	Initializes receiver according to object description stored in input record. More...
virtual void	giveInputRecord (DynamicInputRecord &input)
	Setups the input record string of receiver. More...
virtual contextIOResultType	saveIPContext (DataStream &stream, ContextMode mode, GaussPoint *gp)
	Stores integration point state to output stream. More...
virtual contextIOResultType	restoreIPContext (DataStream &stream, ContextMode mode, GaussPoint *gp)
	Reads integration point state to output stream. More...
Public Member Functions inherited from oofem::FEMComponent
	FEMComponent (int n, Domain *d)
	Regular constructor, creates component with given number and belonging to given domain. More...
virtual	~FEMComponent ()
	Virtual destructor. More...
virtual const char *	giveClassName () const =0
virtual const char *	giveInputRecordName () const =0
Domain *	giveDomain () const
virtual void	setDomain (Domain *d)
	Sets associated Domain. More...
int	giveNumber () const
void	setNumber (int num)
	Sets number of receiver. More...
virtual void	updateLocalNumbering (EntityRenumberingFunctor &f)
	Local renumbering support. More...
virtual contextIOResultType	saveContext (DataStream &stream, ContextMode mode, void *obj=NULL)
	Stores receiver state to output stream. More...
virtual contextIOResultType	restoreContext (DataStream &stream, ContextMode mode, void *obj=NULL)
	Restores the receiver state previously written in stream. More...
virtual void	printOutputAt (FILE *file, TimeStep *tStep)
	Prints output of receiver to stream, for given time step. More...
virtual Interface *	giveInterface (InterfaceType t)
	Interface requesting service. More...
std::string	errorInfo (const char *func) const
	Returns string for prepending output (used by error reporting macros). More...

Additional Inherited Members
Protected Attributes inherited from oofem::CrossSection
Dictionary	propertyDictionary
	Dictionary for storing cross section parameters (like dimensions). More...
int	setNumber
Protected Attributes inherited from oofem::FEMComponent
int	number
	Component number. More...
Domain *	domain
	Link to domain object, useful for communicating with other FEM components. More...

Detailed Description

Abstract base class for all structural cross section models.

It declares commons services provided by all structural cross section models. The implementation of this services is left on derived classes, which will implement cross section model dependent part. However, some general services are implemented here. For information, how to introduce integration points in cross section volume for macro integration point, see CrossSection reference manual.

At structural level of cross section or constitutive models are introduced several stress/strain modes. Full and reduced formats of stress/strain vectors are also introduced for convenience. The full format includes all components, even if they are zero due to stress/strain mode nature, but in the reduced format, only generally nonzero components are stored. (full format must used only if absolutely necessary, to avoid wasting of space. It is used by output routines to print results in general form). Methods for converting vectors between full and reduced format are provided. General full strain vector has one of the following forms:

1. strainVector3d {eps_x,eps_y,eps_z,gamma_yz,gamma_zx,gamma_xy}
2. For integrated cross section models (2d and 3d beams, plates and general shells) strainVectorShell {eps_x,eps_y,gamma_xy, kappa_x, kappa_y, kappa_xy, gamma_zx, gamma_zy}

Definition at line 75 of file structuralcrosssection.h.

Constructor & Destructor Documentation

oofem::StructuralCrossSection::StructuralCrossSection ( int  n, Domain *  d  )

inline

Constructor.

Creates cross section with given number, belonging to given domain.

Parameters

n	Cross section number.
d	Domain to which new cross section will belong.

Definition at line 83 of file structuralcrosssection.h.

virtual oofem::StructuralCrossSection::~StructuralCrossSection ( )

inlinevirtual

Destructor.

Definition at line 85 of file structuralcrosssection.h.

Member Function Documentation

virtual int oofem::StructuralCrossSection::checkConsistency ( )

pure virtual

Allows programmer to test some internal data, before computation begins.

For example, one may use this function, to ensure that element has material with required capabilities is assigned to element. This must be done after all mesh components are instanciated.

Returns

Nonzero if receiver is consistent.

Reimplemented from oofem::FEMComponent.

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

virtual void oofem::StructuralCrossSection::createMaterialStatus ( GaussPoint &  iGP )

pure virtual

Implemented in oofem::FiberedCrossSection, oofem::SimpleCrossSection, and oofem::LayeredCrossSection.

Referenced by oofem::StructuralElement::createMaterialStatus(), and oofem::XfemStructuralElementInterface::XfemElementInterface_updateIntegrationRule().

virtual void oofem::StructuralCrossSection::give2dBeamStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Computes the stiffness matrix for 2d beams.

Parameters

answer	The requested matrix.
mode	Material response mode.
gp	Integration point.
tStep	Time step.

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::LIBeam2dNL::computeConstitutiveMatrixAt(), oofem::LIBeam2d::computeConstitutiveMatrixAt(), and oofem::Beam2d::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::give2dPlateStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Method for computing 2d plate stiffness matrix.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::CCTPlate::computeConstitutiveMatrixAt(), oofem::QDKTPlate::computeConstitutiveMatrixAt(), oofem::DKTPlate::computeConstitutiveMatrixAt(), and oofem::Quad1Mindlin::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::give2dPlateSubSoilStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Method for computing subsoil stiffness matrix for plates.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::Quad1PlateSubSoil::computeConstitutiveMatrixAt(), and oofem::Tria1PlateSubSoil::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::give3dBeamStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Computes the stiffness matrix for 2d beams.

Parameters

answer	The requested matrix.
mode	Material response mode.
gp	Integration point.
tStep	Time step.

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::LIBeam3dNL::computeConstitutiveMatrixAt(), oofem::LIBeam3d2::computeConstitutiveMatrixAt(), oofem::LIBeam3d::computeConstitutiveMatrixAt(), oofem::LIBeam3dNL2::computeConstitutiveMatrixAt(), and oofem::Beam3d::computeConstitutiveMatrixAt().

void oofem::StructuralCrossSection::give3dBeamSubSoilStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

virtual

Method for computing subsoil stiffness matrix for 2d beams.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Definition at line 138 of file structuralcrosssection.C.

References oofem::StructuralMaterial::give3dBeamSubSoilStiffMtrx(), and giveMaterial().

virtual void oofem::StructuralCrossSection::give3dDegeneratedShellStiffMtrx ( FloatMatrix &  answer, MatResponseMode  rMode, GaussPoint *  gp, TimeStep *  tStep  )

inlinevirtual

Method for computing 3d shell stiffness matrix on degenerated shell elements.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Reimplemented in oofem::LayeredCrossSection, and oofem::SimpleCrossSection.

Definition at line 274 of file structuralcrosssection.h.

References OOFEM_ERROR.

Referenced by oofem::MITC4Shell::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::give3dShellStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Method for computing 3d shell stiffness matrix.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::RerShell::computeConstitutiveMatrixAt(), and oofem::Quad1MindlinShell3D::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::giveCauchyStresses ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedFIncrement, TimeStep *  tStep  )

pure virtual

Computes the Cauchy stress vector for a given increment of deformation gradient and given integration point.

The service should use previously reached equilibrium history variables. Also it should update temporary history variables in status according to newly reached state. The temporary history variables are moved into equilibrium ones after global structure equilibrium has been reached by iteration process. Elements should always pass their requests to their cross section model, which performs necessary integration over its volume and invokes necessary material services for corresponding material model defined for given integration point.

Parameters

answer	Contains the Cauchy stress.
gp	Integration point.
reducedFIncrement	Increment of the deformation gradient vector in reduced form.

Todo:

should this then be in a multiplicative way? /JB

Parameters

tStep

Current time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::NLStructuralElement::computeCauchyStressVector().

virtual void oofem::StructuralCrossSection::giveCharMaterialStiffnessMatrix ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Computes the stiffness matrix of receiver in given integration point, respecting its history.

The algorithm should use temporary or equilibrium history variables stored in integration point status to compute and return required result. Elements should always pass their requests to their cross section model, which performs necessary integration over its volume and invokes necessary material services for corresponding material model defined for given integration point.

Parameters

answer	Contains result.
mode	Material response mode.
gp	Integration point.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::Tr_Warp::computeConstitutiveMatrixAt(), oofem::Lattice2d::computeConstitutiveMatrixAt(), oofem::PhaseFieldElement::computeStiffnessMatrix_uu(), and oofem::StructuralElement::~StructuralElement().

virtual void oofem::StructuralCrossSection::giveEshelbyStresses ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedvF, TimeStep *  tStep  )

inlinevirtual

Computes the Eshelby stress vector.

Does not update history variables, this is a postprocesing computation.

Parameters

answer	Contains the Eshelby stress.
gp	Integration point.
tStep	Current time step (most models are able to respond only when tStep is current time step).

Reimplemented in oofem::SimpleCrossSection.

Definition at line 181 of file structuralcrosssection.h.

Referenced by oofem::MaterialForceEvaluator::computeMaterialForce().

virtual void oofem::StructuralCrossSection::giveFirstPKStresses ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedFIncrement, TimeStep *  tStep  )

pure virtual

Computes the First Piola-Kirchoff stress vector for a given deformation gradient and integration point.

The service should use previously reached equilibrium history variables. Also it should update temporary history variables in status according to newly reached state. The temporary history variables are moved into equilibrium ones after global structure equilibrium has been reached by iteration process. Elements should always pass their requests to their cross section model, which performs necessary integration over its volume and invokes necessary material services for corresponding material model defined for given integration point.

Parameters

answer	Contains the First Piola-Kirchoff stresses.
gp	Integration point.
reducedFIncrement	Increment of the deformation gradient vector in reduced form.

Todo:

should this then be in a multiplicative way? /JB

Parameters

tStep

Current time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::NLStructuralElement::computeFirstPKStressVector(), and oofem::SolidShell::giveInternalForcesVector().

void oofem::StructuralCrossSection::giveGeneralizedStress_3dBeamSubSoil ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

virtual

Definition at line 131 of file structuralcrosssection.C.

References giveMaterial(), and oofem::StructuralMaterial::giveRealStressVector_3dBeamSubSoil().

virtual void oofem::StructuralCrossSection::giveGeneralizedStress_Beam2d ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

pure virtual

Computes the generalized stress vector for given strain and integration point.

Parameters

answer	Contains result.
gp	Integration point.
generalizedStrain	Strain vector in reduced generalized form.
tStep	Current time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::LIBeam2dNL::computeStressVector(), oofem::LIBeam2d::computeStressVector(), oofem::Beam2d::computeStressVector(), and giveRealStresses().

virtual void oofem::StructuralCrossSection::giveGeneralizedStress_Beam3d ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::LIBeam3dNL::computeStressVector(), oofem::LIBeam3d2::computeStressVector(), oofem::LIBeam3d::computeStressVector(), oofem::LIBeam3dNL2::computeStressVector(), oofem::Beam3d::computeStressVector(), and giveRealStresses().

virtual void oofem::StructuralCrossSection::giveGeneralizedStress_MembraneRot ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::TrPlaneStrRot::computeStressVector().

virtual void oofem::StructuralCrossSection::giveGeneralizedStress_Plate ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::CCTPlate::computeStressVector(), oofem::QDKTPlate::computeStressVector(), oofem::DKTPlate::computeStressVector(), oofem::Quad1Mindlin::computeStressVector(), oofem::DKTPlate::computeVertexBendingMoments(), and giveRealStresses().

virtual void oofem::StructuralCrossSection::giveGeneralizedStress_PlateSubSoil ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::Quad1PlateSubSoil::computeStressVector(), and oofem::Tria1PlateSubSoil::computeStressVector().

virtual void oofem::StructuralCrossSection::giveGeneralizedStress_Shell ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  generalizedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::RerShell::computeStressVector(), oofem::Quad1MindlinShell3D::computeStressVector(), oofem::Quad1MindlinShell3D::giveInternalForcesVector(), and giveRealStresses().

virtual Material* oofem::StructuralCrossSection::giveMaterial ( IntegrationPoint *  ip )

inlinevirtual

Returns the material associated with the GP.

Default implementation uses gp->giveMaterial() for backwards compatibility, but it should be overloaded in each specialized cross-section.

Implements oofem::CrossSection.

Reimplemented in oofem::LayeredCrossSection, and oofem::SimpleCrossSection.

Definition at line 317 of file structuralcrosssection.h.

References OOFEM_ERROR.

Referenced by give3dBeamSubSoilStiffMtrx(), oofem::MITC4Shell::giveCharacteristicTensor(), giveGeneralizedStress_3dBeamSubSoil(), oofem::MITC4Shell::giveMidplaneIPValue(), giveRealStresses(), and oofem::LinearizedDilationForceAssembler::vectorFromElement().

virtual Interface* oofem::StructuralCrossSection::giveMaterialInterface ( InterfaceType  t, IntegrationPoint *  ip  )

inlinevirtual

Reimplemented in oofem::SimpleCrossSection.

Definition at line 322 of file structuralcrosssection.h.

Referenced by oofem::GradDpElement::computeStiffnessMatrix_kk(), oofem::GradDpElement::computeStiffnessMatrix_ku(), oofem::GradDpElement::computeStiffnessMatrix_uk(), oofem::GradDpElement::computeStiffnessMatrix_uu(), oofem::GradDpElement::computeStressVectorAndLocalCumulatedStrain(), oofem::GradDpElement::giveInternalForcesVector(), and oofem::GradDpElement::giveLocalInternalForcesVector().

virtual void oofem::StructuralCrossSection::giveMembraneRotStiffMtrx ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Method for computing membrane stiffness matrix with added drilling stiffness.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::TrPlaneStrRot::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::giveRealStress_1d ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::QTruss1d::computeStressVector(), oofem::Truss2d::computeStressVector(), oofem::Truss1d::computeStressVector(), oofem::Truss3d::computeStressVector(), and giveRealStresses().

virtual void oofem::StructuralCrossSection::giveRealStress_3d ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::tet21ghostsolid::computeStressVector(), oofem::Structural3DElement::computeStressVector(), oofem::AxisymElement::computeStressVector(), and giveRealStresses().

virtual void oofem::StructuralCrossSection::giveRealStress_3dDegeneratedShell ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedStrain, TimeStep *  tStep  )

inlinevirtual

Reimplemented in oofem::LayeredCrossSection, and oofem::SimpleCrossSection.

Definition at line 104 of file structuralcrosssection.h.

References OOFEM_ERROR.

Referenced by oofem::MITC4Shell::computeStressVector().

virtual void oofem::StructuralCrossSection::giveRealStress_PlaneStrain ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::PlaneStrainElement::computeStressVector(), giveRealStresses(), and oofem::XfemStructuralElementInterface::XfemElementInterface_computeStressVector().

virtual void oofem::StructuralCrossSection::giveRealStress_PlaneStress ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::PlaneStressElement::computeStressVector(), giveRealStresses(), and oofem::XfemStructuralElementInterface::XfemElementInterface_computeStressVector().

virtual void oofem::StructuralCrossSection::giveRealStress_Warping ( FloatArray &  answer, GaussPoint *  gp, const FloatArray &  reducedStrain, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::Tr_Warp::computeStressVector(), and giveRealStresses().

void oofem::StructuralCrossSection::giveRealStresses	(	FloatArray &	answer,
		GaussPoint *	gp,
		const FloatArray &	reducedStrain,
		TimeStep *	tStep
	)

Computes the real stress vector for given strain and integration point.

The service should use previously reached equilibrium history variables. Also it should update temporary history variables in status according to newly reached state. The temporary history variables are moved into equilibrium ones after global structure equilibrium has been reached by iteration process. Elements should always pass their requests to their cross section model, which performs necessary integration over its volume and invokes necessary material services for corresponding material model defined for given integration point.

Parameters

answer	Contains result.
gp	Integration point.
reducedStrain	Strain vector in reduced form.
tStep	Current time step (most models are able to respond only when tStep is current time step).

Todo:

this part only works for simple cross section and will be removed soon when new interface elements are done /JB

Definition at line 44 of file structuralcrosssection.C.

References giveGeneralizedStress_Beam2d(), giveGeneralizedStress_Beam3d(), giveGeneralizedStress_Plate(), giveGeneralizedStress_Shell(), giveMaterial(), oofem::GaussPoint::giveMaterialMode(), giveRealStress_1d(), giveRealStress_3d(), giveRealStress_PlaneStrain(), giveRealStress_PlaneStress(), giveRealStress_Warping(), oofem::StructuralMaterial::giveRealStressVector(), oofem::StructuralMaterial::hasMaterialModeCapability(), and OOFEM_ERROR.

Referenced by oofem::StructuralElement::computeStrainVector(), oofem::Lattice2d::computeStressVector(), and oofem::SolidShell::giveInternalForcesVector().

virtual void oofem::StructuralCrossSection::giveStiffnessMatrix_1d ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::QTruss1d::computeConstitutiveMatrixAt(), oofem::QTruss1dGrad::computeConstitutiveMatrixAt(), oofem::Truss2d::computeConstitutiveMatrixAt(), oofem::Truss1d::computeConstitutiveMatrixAt(), and oofem::Truss3d::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::giveStiffnessMatrix_3d ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Method for computing the stiffness matrix.

Parameters

answer	Stiffness matrix.
mode	Material response mode.
gp	Integration point, which load history is used.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::tet21ghostsolid::computeConstitutiveMatrixAt(), oofem::Structural3DElement::computeConstitutiveMatrixAt(), and oofem::AxisymElement::computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::giveStiffnessMatrix_dCde ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Computes the material stiffness matrix dCde of receiver in a given integration point, respecting its history.

The algorithm should use temporary or equilibrium history variables stored in integration point status to compute and return required result. Elements should always pass their requests to their cross section model, which performs necessary integration over its volume and invokes necessary material services for corresponding material model defined for given integration point.

Parameters

answer	Contains result.
mode	Material response mode.
gp	Integration point.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::NLStructuralElement::computeStiffnessMatrix(), and oofem::NLStructuralElement::computeStiffnessMatrix_withIRulesAsSubcells().

virtual void oofem::StructuralCrossSection::giveStiffnessMatrix_dPdF ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Computes the material stiffness matrix dPdF of receiver in a given integration point, respecting its history.

The algorithm should use temporary or equilibrium history variables stored in integration point status to compute and return required result. Elements should always pass their requests to their cross section model, which performs necessary integration over its volume and invokes necessary material services for corresponding material model defined for given integration point.

Parameters

answer	Contains result.
mode	Material response mode.
gp	Integration point.
tStep	Time step (most models are able to respond only when tStep is current time step).

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::SolidShell::computeStiffnessMatrix(), oofem::NLStructuralElement::computeStiffnessMatrix(), and oofem::NLStructuralElement::computeStiffnessMatrix_withIRulesAsSubcells().

virtual void oofem::StructuralCrossSection::giveStiffnessMatrix_PlaneStrain ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::PlaneStrainElement::computeConstitutiveMatrixAt(), and oofem::XfemStructuralElementInterface::XfemElementInterface_computeConstitutiveMatrixAt().

virtual void oofem::StructuralCrossSection::giveStiffnessMatrix_PlaneStress ( FloatMatrix &  answer, MatResponseMode  mode, GaussPoint *  gp, TimeStep *  tStep  )

pure virtual

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::PlaneStressElement::computeConstitutiveMatrixAt(), and oofem::XfemStructuralElementInterface::XfemElementInterface_computeConstitutiveMatrixAt().

FloatArray * oofem::StructuralCrossSection::imposeStrainConstrainsOnGradient ( GaussPoint *  gp, FloatArray *  gradientStressVector3d  )

virtual

Returns modified gradient of strain vector, which is used to compute plastic strain increment.

Imposes zeros on places, where zero strain occurs or energetically connected stress is prescribed to be zero.

See also

imposeStressConstrainsOnGradient

Parameters

gp	Integration point.
gradientStressVector3d	General 3d stress gradient.

Reimplemented in oofem::LayeredCrossSection, and oofem::FiberedCrossSection.

Definition at line 148 of file structuralcrosssection.C.

References oofem::__MaterialModeToString(), oofem::FloatArray::at(), oofem::GaussPoint::giveMaterialMode(), oofem::FloatArray::giveSize(), and OOFEM_ERROR.

Referenced by oofem::PerfectlyPlasticMaterial::computePlasticStiffnessAt(), oofem::PerfectlyPlasticMaterial::giveRealStressVector(), oofem::FiberedCrossSection::imposeStrainConstrainsOnGradient(), and oofem::LayeredCrossSection::imposeStrainConstrainsOnGradient().

FloatArray * oofem::StructuralCrossSection::imposeStressConstrainsOnGradient ( GaussPoint *  gp, FloatArray *  gradientStressVector3d  )

virtual

Returns modified gradient of stress vector, which is used to bring stresses back to yield surface.

Method imposes zeros on places, where zero stress occurs. if energetically connected strain is zero, we do not impose zero there, because stress exist and must be taken into account when computing yield function. In such case a problem is assumed to be full 3d with some explicit strain equal to 0. On the other hand, if some stress is imposed to be zero, we understand such case as subspace of 3d case (like a classical plane stress problem, with no tracing of e_z, sigma_z)

Parameters

gp	Integration point.
gradientStressVector3d	General 3d stress gradient.

Reimplemented in oofem::LayeredCrossSection, and oofem::FiberedCrossSection.

Definition at line 79 of file structuralcrosssection.C.

References oofem::__MaterialModeToString(), oofem::FloatArray::at(), oofem::GaussPoint::giveMaterialMode(), oofem::FloatArray::giveSize(), and OOFEM_ERROR.

Referenced by oofem::PerfectlyPlasticMaterial::computePlasticStiffnessAt(), oofem::PerfectlyPlasticMaterial::giveRealStressVector(), oofem::PerfectlyPlasticMaterial::GiveStressCorrectionBackToYieldSurface(), oofem::FiberedCrossSection::imposeStressConstrainsOnGradient(), and oofem::LayeredCrossSection::imposeStressConstrainsOnGradient().

virtual bool oofem::StructuralCrossSection::isCharacteristicMtrxSymmetric ( MatResponseMode  rMode )

pure virtual

Check for symmetry of stiffness matrix.

Default implementation returns true. It can be moved to base Cross section class in the future.

Parameters

rMode

Response mode of material.

Returns

True if stiffness matrix of receiver is symmetric.

Reimplemented from oofem::CrossSection.

Implemented in oofem::LayeredCrossSection, oofem::FiberedCrossSection, and oofem::SimpleCrossSection.

Referenced by oofem::StructuralElementEvaluator::computeStiffnessMatrix(), oofem::NLStructuralElement::computeStiffnessMatrix(), oofem::PhaseFieldElement::computeStiffnessMatrix_uu(), and oofem::NLStructuralElement::computeStiffnessMatrix_withIRulesAsSubcells().

virtual int oofem::StructuralCrossSection::testCrossSectionExtension ( CrossSectExtension  ext )

inlinevirtual

Returns nonzero, if receiver implements required extension.

Parameters

ext	Required extension.

Returns

Nonzero, if supported, zero otherwise.

Reimplemented from oofem::CrossSection.

Definition at line 315 of file structuralcrosssection.h.

References oofem::CS_StructuralCapability.

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The documentation for this class was generated from the following files:

• structuralcrosssection.h
• structuralcrosssection.C