#include <steelrelaxmat.h>

Inheritance diagram for oofem::SteelRelaxMat:

Collaboration diagram for oofem::SteelRelaxMat:

Public Member Functions
	SteelRelaxMat (int n, Domain *d)
FloatArrayF< 1 >	giveRealStressVector_1d (const FloatArrayF< 1 > &reducedE, GaussPoint gp, TimeStep tStep) const override
	Default implementation relies on giveRealStressVector_StressControl.
void	giveRealStressVector (FloatArray &answer, GaussPoint gp, const FloatArray &reducedStrain, TimeStep tStep) const override
FloatMatrixF< 1, 1 >	give1dStressStiffMtrx (MatResponseMode mode, GaussPoint gp, TimeStep tStep) const override
void	giveStressDependentPartOfStrainVector (FloatArray &answer, GaussPoint gp, const FloatArray &totalStrain, TimeStep tStep, ValueModeType mode) const
void	computeStressRelaxationStrainVector (FloatArray &answer, GaussPoint gp, const FloatArray &totalStrain, TimeStep tStep, ValueModeType mode) const
void	evalStressRelaxationAtConstStrain (double &answer, GaussPoint *gp, double dt) const
void	computeIncrOfPrestressLossAtVarStrain (double &answer, GaussPoint gp, TimeStep tStep, double stress) const
void	initializeFrom (InputRecord &ir) override
bool	hasMaterialModeCapability (MaterialMode mode) const override
bool	hasCastingTimeSupport () const override
bool	isCharacteristicMtrxSymmetric (MatResponseMode rMode) const override
const char *	giveInputRecordName () const override
const char *	giveClassName () const override
std::unique_ptr< MaterialStatus >	CreateStatus (GaussPoint *gp) const override
int	giveIPValue (FloatArray &answer, GaussPoint gp, InternalStateType type, TimeStep tStep) override
Public Member Functions inherited from oofem::StructuralMaterial
	StructuralMaterial (int n, Domain *d)
bool	hasMaterialModeCapability (MaterialMode mode) const override
const char *	giveClassName () const override
void	initializeFrom (InputRecord &ir) override
void	giveInputRecord (DynamicInputRecord &input) override
void	giveCharacteristicMatrix (FloatMatrix &answer, MatResponseMode type, GaussPoint gp, TimeStep tStep) const override
	Returns characteristic matrix of the receiver.
void	giveCharacteristicVector (FloatArray &answer, FloatArray &flux, MatResponseMode type, GaussPoint gp, TimeStep tStep) const override
	Returns characteristic vector of the receiver.
virtual void	giveStiffnessMatrix (FloatMatrix &answer, MatResponseMode mode, GaussPoint gp, TimeStep tStep) const
virtual FloatArrayF< 6 >	giveRealStressVector_3d (const FloatArrayF< 6 > &strain, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector for second Piola-Kirchoff stress.
virtual FloatArrayF< 4 >	giveRealStressVector_PlaneStrain (const FloatArrayF< 4 > &strain, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector_3d.
virtual FloatArray	giveRealStressVector_StressControl (const FloatArray &reducedE, const IntArray &strainControl, GaussPoint gp, TimeStep tStep) const
	Iteratively calls giveRealStressVector_3d to find the stress controlled equal to zero·
virtual FloatArray	giveRealStressVector_ShellStressControl (const FloatArray &reducedE, const IntArray &strainControl, GaussPoint gp, TimeStep tStep) const
virtual FloatArrayF< 3 >	giveRealStressVector_PlaneStress (const FloatArrayF< 3 > &reducedE, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector_StressControl.
virtual FloatArrayF< 2 >	giveRealStressVector_Warping (const FloatArrayF< 2 > &reducedE, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector_StressControl.
virtual FloatArrayF< 2 >	giveRealStressVector_2dBeamLayer (const FloatArrayF< 2 > &reducedE, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector_StressControl.
virtual FloatArrayF< 5 >	giveRealStressVector_PlateLayer (const FloatArrayF< 5 > &reducedE, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector_StressControl.
virtual FloatArrayF< 3 >	giveRealStressVector_Fiber (const FloatArrayF< 3 > &reducedE, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector_StressControl.
virtual FloatArrayF< 3 >	giveRealStressVector_2dPlateSubSoil (const FloatArrayF< 3 > &reducedE, GaussPoint gp, TimeStep tStep) const
	Default implementation is not provided.
virtual FloatArrayF< 6 >	giveRealStressVector_3dBeamSubSoil (const FloatArrayF< 6 > &reducedE, GaussPoint gp, TimeStep tStep) const
virtual FloatArrayF< 9 >	giveFirstPKStressVector_3d (const FloatArrayF< 9 > &vF, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveRealStressVector for second Piola-Kirchoff stress.
virtual FloatArrayF< 5 >	giveFirstPKStressVector_PlaneStrain (const FloatArrayF< 5 > &vF, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveFirstPKStressVector_3d.
virtual FloatArray	giveFirstPKStressVector_StressControl (const FloatArray &reducedvF, const IntArray &FControl, GaussPoint gp, TimeStep tStep) const
	Iteratively calls giveRealStressVector_3d to find the stress controlled equal to zero·
virtual FloatArrayF< 4 >	giveFirstPKStressVector_PlaneStress (const FloatArrayF< 4 > &vF, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveFirstPKStressVector_StressControl.
virtual FloatArrayF< 1 >	giveFirstPKStressVector_1d (const FloatArrayF< 1 > &vF, GaussPoint gp, TimeStep tStep) const
	Default implementation relies on giveFirstPKStressVector_StressControl.
virtual void	giveCauchyStressVector_3d (FloatArray &answer, GaussPoint gp, const FloatArray &reducedF, TimeStep tStep)
virtual void	giveCauchyStressVector_PlaneStrain (FloatArray &answer, GaussPoint gp, const FloatArray &reducedF, TimeStep tStep)
virtual void	giveCauchyStressVector_PlaneStress (FloatArray &answer, GaussPoint gp, const FloatArray &reducedF, TimeStep tStep)
virtual void	giveCauchyStressVector_1d (FloatArray &answer, GaussPoint gp, const FloatArray &reducedF, TimeStep tStep)
virtual void	giveEshelbyStressVector_PlaneStrain (FloatArray &answer, GaussPoint gp, const FloatArray &reducedF, TimeStep tStep)
virtual FloatArrayF< 6 >	giveThermalDilatationVector (GaussPoint gp, TimeStep tStep) const
double	giveReferenceTemperature ()
virtual FloatArray	computeStressIndependentStrainVector (GaussPoint gp, TimeStep tStep, ValueModeType mode) const
FloatArrayF< 6 >	computeStressIndependentStrainVector_3d (GaussPoint gp, TimeStep tStep, ValueModeType mode) const
virtual FloatMatrixF< 6, 6 >	give3dMaterialStiffnessMatrix (MatResponseMode mode, GaussPoint gp, TimeStep tStep) const
virtual void	giveStiffnessMatrix_dPdF (FloatMatrix &answer, MatResponseMode mode, GaussPoint gp, TimeStep tStep)
virtual FloatMatrixF< 9, 9 >	give3dMaterialStiffnessMatrix_dPdF (MatResponseMode mode, GaussPoint gp, TimeStep tStep) const
virtual void	give3dMaterialStiffnessMatrix_dCde (FloatMatrix &answer, MatResponseMode mode, GaussPoint gp, TimeStep tStep)
void	giveStressDependentPartOfStrainVector (FloatArray &answer, GaussPoint gp, const FloatArray &reducedStrainVector, TimeStep tStep, ValueModeType mode) const
int	setIPValue (const FloatArray &value, GaussPoint *gp, InternalStateType type) override
int	giveIPValue (FloatArray &answer, GaussPoint gp, InternalStateType type, TimeStep tStep) override
virtual FloatMatrixF< 3, 3 >	givePlaneStressStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual FloatMatrixF< 4, 4 >	givePlaneStressStiffnessMatrix_dPdF (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual void	givePlaneStressStiffMtrx_dCde (FloatMatrix &answer, MatResponseMode mmode, GaussPoint gp, TimeStep tStep)
virtual FloatMatrixF< 4, 4 >	givePlaneStrainStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual FloatMatrixF< 5, 5 >	givePlaneStrainStiffnessMatrix_dPdF (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual void	givePlaneStrainStiffMtrx_dCde (FloatMatrix &answer, MatResponseMode mmode, GaussPoint gp, TimeStep tStep)
virtual FloatMatrixF< 1, 1 >	give1dStressStiffnessMatrix_dPdF (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual void	give1dStressStiffMtrx_dCde (FloatMatrix &answer, MatResponseMode mmode, GaussPoint gp, TimeStep tStep)
virtual FloatMatrixF< 2, 2 >	give2dBeamLayerStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual FloatMatrixF< 5, 5 >	givePlateLayerStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual FloatMatrixF< 3, 3 >	giveFiberStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual FloatMatrixF< 3, 3 >	give2dPlateSubSoilStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
virtual FloatMatrixF< 6, 6 >	give3dBeamSubSoilStiffMtrx (MatResponseMode mmode, GaussPoint gp, TimeStep tStep) const
Public Member Functions inherited from oofem::Material
	Material (int n, Domain *d)
virtual	~Material ()=default
	Destructor.
virtual double	giveCharacteristicValue (MatResponseMode type, GaussPoint gp, TimeStep tStep) const
	Returns characteristic value of the receiver.
virtual double	give (int aProperty, GaussPoint *gp) const
virtual bool	hasProperty (int aProperty, GaussPoint *gp) const
virtual void	modifyProperty (int aProperty, double value, GaussPoint *gp)
double	giveCastingTime () const
virtual bool	isActivated (TimeStep *tStep) const
void	printYourself () override
	Prints receiver state on stdout. Useful for debugging.
virtual void	saveIPContext (DataStream &stream, ContextMode mode, GaussPoint *gp)
virtual void	restoreIPContext (DataStream &stream, ContextMode mode, GaussPoint *gp)
int	checkConsistency () override
virtual void	restoreConsistency (GaussPoint *gp)
virtual int	initMaterial (Element *element)
virtual MaterialStatus *	giveStatus (GaussPoint *gp) const
virtual int	packUnknowns (DataStream &buff, TimeStep tStep, GaussPoint ip)
virtual int	unpackAndUpdateUnknowns (DataStream &buff, TimeStep tStep, GaussPoint ip)
virtual int	estimatePackSize (DataStream &buff, GaussPoint *ip)
virtual double	predictRelativeComputationalCost (GaussPoint *gp)
virtual double	predictRelativeRedistributionCost (GaussPoint *gp)
virtual void	initTempStatus (GaussPoint *gp) const
void	saveContext (DataStream &stream, ContextMode mode) override
void	restoreContext (DataStream &stream, ContextMode mode) override
Public Member Functions inherited from oofem::FEMComponent
	FEMComponent (int n, Domain *d)
virtual	~FEMComponent ()=default
	Virtual destructor.
Domain *	giveDomain () const
virtual void	setDomain (Domain *d)
int	giveNumber () const
void	setNumber (int num)
virtual void	updateLocalNumbering (EntityRenumberingFunctor &f)
virtual void	initializeFrom (InputRecord &ir, int priority)
virtual void	initializeFinish ()
virtual void	postInitialize ()
	Performs post initialization steps. Called after all components are created and initialized.
virtual void	printOutputAt (FILE file, TimeStep tStep)
virtual Interface *	giveInterface (InterfaceType t)
std::string	errorInfo (const char *func) const
	Returns string for prepending output (used by error reporting macros).

Protected Types
enum	approachType { Bazant_EC2 , EquivTime_EC2 }

Protected Attributes
double	E = 0.
	Young's modulus.
double	k1 = 0.
	constant depending on the reinforcement class
double	k2 = 0.
	constant depending on the reinforcement class
double	rho1000 = 0.
	constant depending on the reinforcement class
double	mu = 0.
	ratio of prestress vs. characteristic strength
double	timeFactor = 0.
double	charStrength = 0.
	characteristic strength of prestressing steel in appropriate units (not necessarily MPa)
double	tolerance = 0.
	tolerance specifying the residual in the stress evaluation algorithm, default value is $10^{-6}$
double	relRelaxBound = 0.
enum oofem::SteelRelaxMat::approachType	Approach = Bazant_EC2
Protected Attributes inherited from oofem::StructuralMaterial
double	referenceTemperature = 0.
	Reference temperature (temperature, when material has been built into structure).
MatResponseMode	SCStiffMode = TangentStiffness
	stifness mode used in stress control
double	SCRelTol = 1.e-3
	relative tolerance for stress control
double	SCAbsTol = 1.e-12
	absolute stress tolerance for stress control
int	SCMaxiter = 100000
	maximum iterations for stress-control
Protected Attributes inherited from oofem::Material
Dictionary	propertyDictionary
double	castingTime
int	preCastingTimeMat
	Material existing before casting time - optional parameter, zero by default.
Protected Attributes inherited from oofem::FEMComponent
int	number
	Component number.
Domain *	domain
	Link to domain object, useful for communicating with other FEM components.

Additional Inherited Members
Static Public Member Functions inherited from oofem::StructuralMaterial
static int	giveSymVI (int ind1, int ind2)
static int	giveVI (int ind1, int ind2)
static FloatMatrixF< 9, 9 >	convert_dSdE_2_dPdF_3D (const FloatMatrixF< 6, 6 > &dSdE, const FloatArrayF< 6 > &S, const FloatArrayF< 9 > &F)
static FloatMatrixF< 5, 5 >	convert_dSdE_2_dPdF_PlaneStrain (const FloatMatrixF< 4, 4 > &dSdE, const FloatArrayF< 4 > &S, const FloatArrayF< 5 > &F)
static FloatMatrixF< 4, 4 >	convert_dSdE_2_dPdF_PlaneStress (const FloatMatrixF< 3, 3 > &dSdE, const FloatArrayF< 3 > &S, const FloatArrayF< 4 > &F)
static FloatMatrixF< 1, 1 >	convert_dSdE_2_dPdF_1D (const FloatMatrixF< 1, 1 > &dSdE, const FloatArrayF< 1 > &S, const FloatArrayF< 1 > &F)
static void	computePrincipalValues (FloatArray &answer, const FloatArray &s, stressStrainPrincMode mode)
	Common functions for convenience.
static FloatArrayF< 3 >	computePrincipalValues (const FloatMatrixF< 3, 3 > &s)
static FloatArrayF< 3 >	computePrincipalValues (double I1, double I2, double I3)
static void	computePrincipalValDir (FloatArray &answer, FloatMatrix &dir, const FloatArray &s, stressStrainPrincMode mode)
static std::pair< FloatArrayF< 3 >, FloatMatrixF< 3, 3 > >	computePrincipalValDir (const FloatMatrixF< 3, 3 > &s)
static FloatArrayF< 6 >	computeDeviator (const FloatArrayF< 6 > &s)
static std::pair< FloatArrayF< 6 >, double >	computeDeviatoricVolumetricSplit (const FloatArrayF< 6 > &s)
static FloatArrayF< 6 >	computeDeviatoricVolumetricSum (const FloatArrayF< 6 > &dev, double mean)
static FloatArrayF< 6 >	applyDeviatoricElasticCompliance (const FloatArrayF< 6 > &stress, double EModulus, double nu)
static FloatArrayF< 6 >	applyDeviatoricElasticCompliance (const FloatArrayF< 6 > &stress, double GModulus)
static FloatArrayF< 6 >	applyDeviatoricElasticStiffness (const FloatArrayF< 6 > &strain, double EModulus, double nu)
static FloatArrayF< 6 >	applyDeviatoricElasticStiffness (const FloatArrayF< 6 > &strain, double GModulus)
static FloatArrayF< 6 >	applyElasticStiffness (const FloatArrayF< 6 > &strain, double EModulus, double nu)
static FloatArrayF< 6 >	applyElasticCompliance (const FloatArrayF< 6 > &stress, double EModulus, double nu)
static double	computeStressNorm (const FloatArrayF< 6 > &stress)
static double	computeFirstInvariant (const FloatArrayF< 6 > &s)
static double	computeSecondStressInvariant (const FloatArrayF< 6 > &s)
static double	computeThirdStressInvariant (const FloatArrayF< 6 > &s)
static double	computeFirstCoordinate (const FloatArrayF< 6 > &s)
static double	computeSecondCoordinate (const FloatArrayF< 6 > &s)
static double	computeThirdCoordinate (const FloatArrayF< 6 > &s)
static int	giveVoigtVectorMask (IntArray &answer, MaterialMode mmode)
static int	giveVoigtSymVectorMask (IntArray &answer, MaterialMode mmode)
static void	giveInvertedVoigtVectorMask (IntArray &answer, MaterialMode mmode)
static int	giveSizeOfVoigtVector (MaterialMode mmode)
static int	giveSizeOfVoigtSymVector (MaterialMode mmode)
static void	giveFullVectorForm (FloatArray &answer, const FloatArray &strainVector, MaterialMode matMode)
	Converts the reduced symmetric Voigt vector (2nd order tensor) to full form.
static void	giveFullVectorFormF (FloatArray &answer, const FloatArray &strainVector, MaterialMode matMode)
	Converts the reduced deformation gradient Voigt vector (2nd order tensor).
static void	giveFullSymVectorForm (FloatArray &answer, const FloatArray &vec, MaterialMode matMode)
	Converts the reduced unsymmetric Voigt vector (2nd order tensor) to full form.
static void	giveReducedVectorForm (FloatArray &answer, const FloatArray &vec, MaterialMode matMode)
	Converts the full symmetric Voigt vector (2nd order tensor) to reduced form.
static void	giveReducedSymVectorForm (FloatArray &answer, const FloatArray &vec, MaterialMode matMode)
	Converts the full unsymmetric Voigt vector (2nd order tensor) to reduced form.
static void	giveFullSymMatrixForm (FloatMatrix &answer, const FloatMatrix &red, MaterialMode matMode)
	Converts the full unsymmetric Voigt matrix (4th order tensor) to reduced form.
static void	giveReducedMatrixForm (FloatMatrix &answer, const FloatMatrix &full, MaterialMode matMode)
	Converts the full symmetric Voigt matrix (4th order tensor) to reduced form.
static void	giveReducedSymMatrixForm (FloatMatrix &answer, const FloatMatrix &full, MaterialMode matMode)
	Converts the full unsymmetric Voigt matrix (4th order tensor) to reduced form.
static FloatArrayF< 6 >	transformStrainVectorTo (const FloatMatrixF< 3, 3 > &base, const FloatArrayF< 6 > &strain, bool transpose=false)
static FloatArrayF< 6 >	transformStressVectorTo (const FloatMatrixF< 3, 3 > &base, const FloatArrayF< 6 > &stress, bool transpose=false)
static double	computeVonMisesStress (const FloatArray &currentStress)
static double	computeVonMisesStress_3D (const FloatArrayF< 6 > &stress)
static double	computeVonMisesStress_PlaneStress (const FloatArrayF< 3 > &stress)
static FloatMatrixF< 6, 6 >	giveStrainVectorTranformationMtrx (const FloatMatrixF< 3, 3 > &base, bool transpose=false)
static FloatMatrixF< 3, 3 >	give2DStrainVectorTranformationMtrx (const FloatMatrixF< 2, 2 > &base, bool transpose=false)
static FloatMatrixF< 6, 6 >	giveStressVectorTranformationMtrx (const FloatMatrixF< 3, 3 > &base, bool transpose=false)
static FloatMatrixF< 3, 3 >	givePlaneStressVectorTranformationMtrx (const FloatMatrixF< 2, 2 > &base, bool transpose=false)
static void	sortPrincDirAndValCloseTo (FloatArray &pVal, FloatMatrix &pDir, const FloatMatrix &toPDir)
Static Public Attributes inherited from oofem::StructuralMaterial
static std::array< std::array< int, 3 >, 3 >	vIindex
	Voigt index map.
static std::array< std::array< int, 3 >, 3 >	svIndex
	Symmetric Voigt index map.

Detailed Description

Implementation of the material model for steel relaxation given in Eurocode 2 (the same as in Model Code 2010) and in Ba\v{z}ant and Yu (J. of Eng. Mech, 2013) which reduces to the first model under constant strain. At variable strain history the first model uses the approach employing the so-called {\sl{equivalent time}} approach described in Annex D in the Eurocode 2. The current implementation takes into account only prestress losses due to steel relaxation, other losses (e.g. slip at anchorage, thermal dilation, friction, etc.) need to be treated separately. The same holds for the stress transfer from prestressing reinforcement to concrete in the region called {\sl{transmission length}}. On the other hand, losses due to sequential prestressing, elastic deformation and both short-time and long-time creep and shrinkage are taken into account automatically provided that a suitable material model is chosen for concrete. See material manual and the above-mentioned documents for details.

Definition at line 80 of file steelrelaxmat.h.

Member Enumeration Documentation

◆ approachType

enum oofem::SteelRelaxMat::approachType

protected

0 = approach according to Ba\v{z}ant and Yu, 1 = equivalent time approach according to Eurocode 2 and {\sl{fib}} Model Code 2010

Enumerator
Bazant_EC2
EquivTime_EC2

Definition at line 124 of file steelrelaxmat.h.

Constructor & Destructor Documentation

◆ SteelRelaxMat()

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

Definition at line 48 of file steelrelaxmat.C.

References oofem::StructuralMaterial::StructuralMaterial().

Referenced by giveRealStressVector_1d().

Member Function Documentation

◆ computeIncrOfPrestressLossAtVarStrain()

void oofem::SteelRelaxMat::computeIncrOfPrestressLossAtVarStrain	(	double &	answer,
		GaussPoint *	gp,
		TimeStep *	tStep,
		double	stress ) const

implementation of cumulative time approach according to Eurocode to get prestress loss at variable strain

Definition at line 272 of file steelrelaxmat.C.

References charStrength, evalStressRelaxationAtConstStrain(), oofem::SteelRelaxMatStatus::giveRelaxIntVariable(), oofem::Material::giveStatus(), oofem::TimeStep::giveTimeIncrement(), k1, k2, mu, relRelaxBound, rho1000, oofem::SteelRelaxMatStatus::setTempPrestress(), oofem::SteelRelaxMatStatus::setTempRelaxIntVariable(), and timeFactor.

Referenced by giveRealStressVector().

◆ computeStressRelaxationStrainVector()

void oofem::SteelRelaxMat::computeStressRelaxationStrainVector	(	FloatArray &	answer,
		GaussPoint *	gp,
		const FloatArray &	totalStrain,
		TimeStep *	tStep,
		ValueModeType	mode ) const

◆ CreateStatus()

std::unique_ptr< MaterialStatus > oofem::SteelRelaxMat::CreateStatus ( GaussPoint * gp ) const

overridevirtual

Creates new copy of associated status and inserts it into given integration point.

Parameters

gp	Integration point where newly created status will be stored.

Returns: Reference to new status.

Reimplemented from oofem::Material.

Definition at line 113 of file steelrelaxmat.C.

◆ evalStressRelaxationAtConstStrain()

void oofem::SteelRelaxMat::evalStressRelaxationAtConstStrain	(	double &	answer,
		GaussPoint *	gp,
		double	dt ) const

computes steel relaxation (eurocode formula)

Definition at line 245 of file steelrelaxmat.C.

References charStrength, oofem::SteelRelaxMatStatus::givePrestress(), oofem::Material::giveStatus(), k1, k2, mu, relRelaxBound, rho1000, and timeFactor.

Referenced by computeIncrOfPrestressLossAtVarStrain(), and computeStressRelaxationStrainVector().

◆ give1dStressStiffMtrx()

FloatMatrixF< 1, 1 > oofem::SteelRelaxMat::give1dStressStiffMtrx	(	MatResponseMode	mmode,
		GaussPoint *	gp,
		TimeStep *	tStep ) const

overridevirtual

Method for computing 1d stiffness matrix of receiver. Default implementation computes 3d stiffness matrix using give3dMaterialStiffnessMatrix and reduces it to 1d stiffness using reduce method described above. However, this reduction is quite time consuming and if it is possible, it is recommended to overload this method and provide direct method for computing particular stiffness matrix.

Parameters

mmode	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).

Returns: Stiffness matrix.

Reimplemented from oofem::StructuralMaterial.

Definition at line 215 of file steelrelaxmat.C.

References E, and oofem::Material::isActivated().

◆ giveClassName()

const char * oofem::SteelRelaxMat::giveClassName ( ) const

inlineoverridevirtual

Returns: Class name of the receiver.

Implements oofem::FEMComponent.

Definition at line 170 of file steelrelaxmat.h.

◆ giveInputRecordName()

const char * oofem::SteelRelaxMat::giveInputRecordName ( ) const

inlineoverridevirtual

Returns: Input record name of the receiver.

Implements oofem::FEMComponent.

Definition at line 169 of file steelrelaxmat.h.

References _IFT_SteelRelaxMat_Name.

◆ giveIPValue()

int oofem::SteelRelaxMat::giveIPValue	(	FloatArray &	answer,
		GaussPoint *	gp,
		InternalStateType	type,
		TimeStep *	tStep )

overridevirtual

Returns the integration point corresponding value in Reduced form.

Parameters

answer	Contain corresponding ip value, zero sized if not available.
gp	Integration point to which the value refers.
type	Determines the type of internal variable.
tStep	Determines the time step.

Returns: Nonzero if the assignment can be done, zero if this type of variable is not supported.

Reimplemented from oofem::Material.

Definition at line 401 of file steelrelaxmat.C.

References oofem::StructuralMaterial::giveIPValue().

◆ giveRealStressVector()

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

overridevirtual

Computes the real stress vector for given total strain and integration point. The total strain is defined as strain computed directly from displacement field at given time. The stress independent parts (temperature, eigenstrains) are subtracted in constitutive driver. 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.

Parameters

answer	Stress vector in reduced form. For large deformations it is treated as the second Piola-Kirchoff stress.
gp	Integration point.
reducedStrain	Strain vector in reduced form. For large deformations it is treated as the Green-Lagrange strain.
tStep	Current time step (most models are able to respond only when tStep is current time step).

Todo: Move this to StructuralCrossSection ?

Reimplemented from oofem::StructuralMaterial.

Definition at line 119 of file steelrelaxmat.C.

References Approach, oofem::FloatArray::at(), Bazant_EC2, oofem::FloatArray::beDifferenceOf(), computeIncrOfPrestressLossAtVarStrain(), E, EquivTime_EC2, oofem::FloatArray::giveSize(), oofem::Material::giveStatus(), oofem::StructuralMaterialStatus::giveStrainVector(), giveStressDependentPartOfStrainVector(), oofem::StructuralMaterial::giveStressDependentPartOfStrainVector(), oofem::StructuralMaterialStatus::giveStressVector(), oofem::StructuralMaterialStatus::giveTempStressVector(), oofem::Material::isActivated(), oofem::StructuralMaterialStatus::letTempStrainVectorBe(), oofem::StructuralMaterialStatus::letTempStressVectorBe(), OOFEM_ERROR, OOFEM_WARNING, oofem::FloatArray::resize(), and oofem::FloatArray::zero().

Referenced by giveRealStressVector_1d().

◆ giveRealStressVector_1d()

FloatArrayF< 1 > oofem::SteelRelaxMat::giveRealStressVector_1d	(	const FloatArrayF< 1 > &	reducedE,
		GaussPoint *	gp,
		TimeStep *	tStep ) const

inlineoverridevirtual

Default implementation relies on giveRealStressVector_StressControl.

Reimplemented from oofem::StructuralMaterial.

Definition at line 129 of file steelrelaxmat.h.

References giveRealStressVector(), and SteelRelaxMat().

◆ giveStressDependentPartOfStrainVector()

void oofem::SteelRelaxMat::giveStressDependentPartOfStrainVector	(	FloatArray &	answer,
		GaussPoint *	gp,
		const FloatArray &	totalStrain,
		TimeStep *	tStep,
		ValueModeType	mode ) const

evaluates stress-related strain - subtracts not only temperature strains but also strains caused by steel relaxation

Definition at line 228 of file steelrelaxmat.C.

References computeStressRelaxationStrainVector(), oofem::StructuralMaterial::giveStressDependentPartOfStrainVector(), and oofem::FloatArray::subtract().

Referenced by giveRealStressVector().

◆ hasCastingTimeSupport()

bool oofem::SteelRelaxMat::hasCastingTimeSupport ( ) const

inlineoverridevirtual

Tests if material supports casting time

Returns: Nonzero if supported, zero otherwise.

Reimplemented from oofem::Material.

Definition at line 165 of file steelrelaxmat.h.

◆ hasMaterialModeCapability()

bool oofem::SteelRelaxMat::hasMaterialModeCapability ( MaterialMode mode ) const

overridevirtual

Tests if material supports material mode.

Parameters

mode	Required material mode.

Returns: Nonzero if supported, zero otherwise.

Reimplemented from oofem::Material.

Definition at line 53 of file steelrelaxmat.C.

◆ initializeFrom()

void oofem::SteelRelaxMat::initializeFrom ( InputRecord & ir )

overridevirtual

Initializes receiver according to object description stored in input record. This function is called immediately after creating object using constructor. Input record can be imagined as data record in component database belonging to receiver. Receiver may use value-name extracting functions to extract particular field from record. Note that initializeFrom may be called mutiple times.

See also: IR_GIVE_FIELD; IR_GIVE_OPTIONAL_FIELD

Parameters

ir	Input record to initialize from.
priority	Priority of the input record. This is used to determine the order of initialization

Reimplemented from oofem::Material.

Definition at line 60 of file steelrelaxmat.C.

References _IFT_SteelRelaxMat_approach, _IFT_SteelRelaxMat_charStrength, _IFT_SteelRelaxMat_E, _IFT_SteelRelaxMat_k1, _IFT_SteelRelaxMat_k2, _IFT_SteelRelaxMat_reinfClass, _IFT_SteelRelaxMat_relRelaxBound, _IFT_SteelRelaxMat_rho1000, _IFT_SteelRelaxMat_timeFactor, _IFT_SteelRelaxMat_tolerance, Approach, charStrength, E, oofem::StructuralMaterial::initializeFrom(), IR_GIVE_FIELD, IR_GIVE_OPTIONAL_FIELD, k1, k2, OOFEM_ERROR, relRelaxBound, rho1000, timeFactor, and tolerance.

◆ isCharacteristicMtrxSymmetric()

bool oofem::SteelRelaxMat::isCharacteristicMtrxSymmetric ( MatResponseMode rMode ) const

inlineoverridevirtual

Returns true if stiffness matrix of receiver is symmetric Default implementation returns true.

Reimplemented from oofem::Material.

Definition at line 167 of file steelrelaxmat.h.

Member Data Documentation

◆ Approach

enum oofem::SteelRelaxMat::approachType oofem::SteelRelaxMat::Approach = Bazant_EC2

protected

Referenced by giveRealStressVector(), and initializeFrom().

◆ charStrength

double oofem::SteelRelaxMat::charStrength = 0.

protected

characteristic strength of prestressing steel in appropriate units (not necessarily MPa)

Definition at line 108 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), evalStressRelaxationAtConstStrain(), and initializeFrom().

◆ E

double oofem::SteelRelaxMat::E = 0.

protected

Young's modulus.

Definition at line 84 of file steelrelaxmat.h.

Referenced by computeStressRelaxationStrainVector(), give1dStressStiffMtrx(), giveRealStressVector(), and initializeFrom().

◆ k1

double oofem::SteelRelaxMat::k1 = 0.

protected

constant depending on the reinforcement class

Definition at line 87 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), evalStressRelaxationAtConstStrain(), and initializeFrom().

◆ k2

double oofem::SteelRelaxMat::k2 = 0.

protected

constant depending on the reinforcement class

Definition at line 90 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), evalStressRelaxationAtConstStrain(), and initializeFrom().

◆ mu

double oofem::SteelRelaxMat::mu = 0.

protected

ratio of prestress vs. characteristic strength

Definition at line 96 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), and evalStressRelaxationAtConstStrain().

◆ relRelaxBound

double oofem::SteelRelaxMat::relRelaxBound = 0.

protected

Ratio of stress to characteristic strength under which the relaxation is zero (typically 0.4–0.5); default value is zero.

Definition at line 118 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), evalStressRelaxationAtConstStrain(), and initializeFrom().

◆ rho1000

double oofem::SteelRelaxMat::rho1000 = 0.

protected

constant depending on the reinforcement class

Definition at line 93 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), evalStressRelaxationAtConstStrain(), and initializeFrom().

◆ timeFactor

double oofem::SteelRelaxMat::timeFactor = 0.

protected

Scaling factor transforming the actual time into appropriate units needed by the formulae of the eurocode. For analysis in days timeFactor = 1, for analysis in seconds timeFactor = 86,400.

Definition at line 103 of file steelrelaxmat.h.

Referenced by computeIncrOfPrestressLossAtVarStrain(), computeStressRelaxationStrainVector(), evalStressRelaxationAtConstStrain(), and initializeFrom().

◆ tolerance

double oofem::SteelRelaxMat::tolerance = 0.

protected

tolerance specifying the residual in the stress evaluation algorithm, default value is $10^{-6}$

Definition at line 111 of file steelrelaxmat.h.

Referenced by initializeFrom().

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

Public Member Functions

Protected Types

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ approachType

Constructor & Destructor Documentation

◆ SteelRelaxMat()

Member Function Documentation

◆ computeIncrOfPrestressLossAtVarStrain()

◆ computeStressRelaxationStrainVector()

◆ CreateStatus()

◆ evalStressRelaxationAtConstStrain()

◆ give1dStressStiffMtrx()

◆ giveClassName()

◆ giveInputRecordName()

◆ giveIPValue()

◆ giveRealStressVector()

◆ giveRealStressVector_1d()

◆ giveStressDependentPartOfStrainVector()

◆ hasCastingTimeSupport()

◆ hasMaterialModeCapability()

◆ initializeFrom()

◆ isCharacteristicMtrxSymmetric()

Member Data Documentation

◆ Approach

◆ charStrength

◆ E

◆ k1

◆ k2

◆ mu

◆ relRelaxBound

◆ rho1000

◆ timeFactor

◆ tolerance