Kratos::HighCycleFatigueLawIntegrator< TVoigtSize > Class Template Reference

: This object computes all the required information for the high cycle fatigue constitutive law. More...

#include <high_cycle_fatigue_law_integrator.h>

Collaboration diagram for Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >:

Public Member Functions
Type Definitions
	KRATOS_CLASS_POINTER_DEFINITION (HighCycleFatigueLawIntegrator)
	Counted pointer of HighCycleFatigueLawIntegrator. More...
Life Cycle
	HighCycleFatigueLawIntegrator ()
	Initialization constructor. More...
	HighCycleFatigueLawIntegrator (HighCycleFatigueLawIntegrator const &rOther)
	Copy constructor. More...
HighCycleFatigueLawIntegrator &	operator= (HighCycleFatigueLawIntegrator const &rOther)
	Assignment operator. More...
virtual	~HighCycleFatigueLawIntegrator ()
	Destructor. More...

Static Public Member Functions
Operations
static void	CalculateMaximumAndMinimumStresses (const double CurrentStress, double &rMaximumStress, double &rMinimumStress, const Vector &PreviousStresses, bool &rMaxIndicator, bool &rMinIndicator)
	This method checks and saves the previous stress state if it was a maximum or a minimum. More...
static double	CalculateTensionCompressionFactor (const Vector &rStressVector)
	This method checks if the global stress state is tension or compression; -1 for a generalized compression state and 1 for a generalized tensile state. More...
static double	CalculateReversionFactor (const double MaxStress, const double MinStress)
	This method returns de reversion factor. More...
static void	CalculateFatigueParameters (const double MaxStress, double ReversionFactor, const Properties &rMaterialParameters, double &rB0, double &rSth, double &rAlphat, double &rN_f)
	This method computes internal variables (B0, Sth and ALPHAT) of the CL. More...
static void	CalculateFatigueReductionFactorAndWohlerStress (const Properties &rMaterialParameters, const double MaxStress, unsigned int LocalNumberOfCycles, unsigned int GlobalNumberOfCycles, const double B0, const double Sth, const double Alphat, double &rFatigueReductionFactor, double &rWohlerStress)
	This method computes the reduction factor and the wohler stress (SN curve) More...

Detailed Description

template<SizeType TVoigtSize = 6>
class Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >

: This object computes all the required information for the high cycle fatigue constitutive law.

The definitions of these classes is completely static, the derivation is done in a static way

Template Parameters

TVoigtSize

Strain size

Author

Sergio Jimenez, Alejandro Cornejo & Lucia Barbu

Constructor & Destructor Documentation

HighCycleFatigueLawIntegrator() [1/2]

template<SizeType TVoigtSize = 6>

Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::HighCycleFatigueLawIntegrator ( )

inline

Initialization constructor.

HighCycleFatigueLawIntegrator() [2/2]

template<SizeType TVoigtSize = 6>

Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::HighCycleFatigueLawIntegrator ( HighCycleFatigueLawIntegrator< TVoigtSize > const &  rOther )

inline

Copy constructor.

~HighCycleFatigueLawIntegrator()

template<SizeType TVoigtSize = 6>

virtual Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::~HighCycleFatigueLawIntegrator ( )

inlinevirtual

Destructor.

Member Function Documentation

CalculateFatigueParameters()

template<SizeType TVoigtSize = 6>

static void Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::CalculateFatigueParameters ( const double  MaxStress, double  ReversionFactor, const Properties &  rMaterialParameters, double &  rB0, double &  rSth, double &  rAlphat, double &  rN_f  )

inlinestatic

This method computes internal variables (B0, Sth and ALPHAT) of the CL.

Parameters

MaxStress	Signed maximum stress in the current cycle.
ReversionFactor	Ratio between the minimum and maximum signed equivalent stresses for the current load cycle.
MaterialParameters	Material properties.
rB0	Internal variable of the fatigue model.
rSth	Endurance limit of the fatigue model.
rAlphat	Internal variable of the fatigue model.

CalculateFatigueReductionFactorAndWohlerStress()

template<SizeType TVoigtSize = 6>

static void Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::CalculateFatigueReductionFactorAndWohlerStress ( const Properties &  rMaterialParameters, const double  MaxStress, unsigned int  LocalNumberOfCycles, unsigned int  GlobalNumberOfCycles, const double  B0, const double  Sth, const double  Alphat, double &  rFatigueReductionFactor, double &  rWohlerStress  )

inlinestatic

This method computes the reduction factor and the wohler stress (SN curve)

Parameters

MaterialParameters	Material properties.
MaxStress	Signed maximum stress in the current cycle.
LocalNumberOfCycles	Number of cycles in the current load.
GlobalNumberOfCycles	Number of cycles in the whole analysis.
B0	Internal variable of the fatigue model.
Sth	Endurance limit of the fatigue model.
Alphat	Internal variable of the fatigue model.
rFatigueReductionFactor	Reduction factor from the previous step to be reevaluated.
rWohlerStress	Normalized Wohler stress used to build the life prediction curves (SN curve).

CalculateMaximumAndMinimumStresses()

template<SizeType TVoigtSize = 6>

static void Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::CalculateMaximumAndMinimumStresses ( const double  CurrentStress, double &  rMaximumStress, double &  rMinimumStress, const Vector &  PreviousStresses, bool &  rMaxIndicator, bool &  rMinIndicator  )

inlinestatic

This method checks and saves the previous stress state if it was a maximum or a minimum.

Parameters

CurrentStress	Equivalent stress in the current step.
rMaximumStress	Maximum stress.
rMinimumStress	Minimum stress.
PreviousStresses	Equivalent stresses in the two previous steps.
rMaxIndicator	Indicator of a maximum in the current cycle.
rMinIndicator	Indicator of a minimum in the current cycle.

CalculateReversionFactor()

template<SizeType TVoigtSize = 6>

static double Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::CalculateReversionFactor ( const double  MaxStress, const double  MinStress  )

inlinestatic

This method returns de reversion factor.

Parameters

MaxStress	Signed maximum equivalent stress in the current cycle.
MinStress	Signed minimum equivalent stress in the current cycle.

CalculateTensionCompressionFactor()

template<SizeType TVoigtSize = 6>

static double Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::CalculateTensionCompressionFactor ( const Vector &  rStressVector )

inlinestatic

This method checks if the global stress state is tension or compression; -1 for a generalized compression state and 1 for a generalized tensile state.

Parameters

StressVector

Current predictive stress tensor.

KRATOS_CLASS_POINTER_DEFINITION()

template<SizeType TVoigtSize = 6>

Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::KRATOS_CLASS_POINTER_DEFINITION

(

HighCycleFatigueLawIntegrator< TVoigtSize >

)

Counted pointer of HighCycleFatigueLawIntegrator.

operator=()

template<SizeType TVoigtSize = 6>

HighCycleFatigueLawIntegrator& Kratos::HighCycleFatigueLawIntegrator< TVoigtSize >::operator= ( HighCycleFatigueLawIntegrator< TVoigtSize > const &  rOther )

inline

Assignment operator.

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

• /home/runner/work/Documentation/Documentation/master/applications/ConstitutiveLawsApplication/custom_constitutive/auxiliary_files/cl_integrators/high_cycle_fatigue_law_integrator.h