Kratos::DruckerPragerPlasticPotential< TVoigtSize > Class Template Reference

This class defines a plastic potential following the theory of Drucker-Prager. More...

#include <drucker_prager_plastic_potential.h>

Collaboration diagram for Kratos::DruckerPragerPlasticPotential< TVoigtSize >:

Public Member Functions
Life Cycle
	DruckerPragerPlasticPotential ()
	Initialization constructor. More...
	DruckerPragerPlasticPotential (DruckerPragerPlasticPotential const &rOther)
	Copy constructor. More...
DruckerPragerPlasticPotential &	operator= (DruckerPragerPlasticPotential const &rOther)
	Assignment operator. More...
virtual	~DruckerPragerPlasticPotential ()
	Destructor. More...

Static Public Member Functions
Operations
static void	CalculatePlasticPotentialDerivative (const array_1d< double, VoigtSize > &rPredictiveStressVector, const array_1d< double, VoigtSize > &rDeviator, const double J2, array_1d< double, VoigtSize > &rGFlux, ConstitutiveLaw::Parameters &rValues)
	This script calculates the derivatives of the plastic potential according to NAYAK-ZIENKIEWICZ paper International journal for numerical methods in engineering vol 113-135 1972. As: DF/DS = c1*V1 + c2*V2 + c3*V3. More...
static int	Check (const Properties &rMaterialProperties)
	This method defines the check to be performed in the plastic potential. More...

Type Definitions
static constexpr SizeType	Dimension = TVoigtSize == 6 ? 3 : 2
	We define the dimension. More...
static constexpr SizeType	VoigtSize = TVoigtSize
	The define the Voigt size. More...
	KRATOS_CLASS_POINTER_DEFINITION (DruckerPragerPlasticPotential)
	Counted pointer of DruckerPragerPlasticPotential. More...

Detailed Description

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

This class defines a plastic potential following the theory of Drucker-Prager.

When the yield and plastic potential surfaces are plotted in principal stress space the resulting surface will be a circular cone for Drucker-Prager. This means that both yield and strength are dependent on intermediate principal stress, sigma_2 The plastic potential requires the definition of the following properties:

• DILATANCY_ANGLE: The angle of dilation controls an amount of plastic volumetric strain developed during plastic shearing and is assumed constant during plastic yielding. The value of DILATANCY_ANGLE=0 corresponds to the volume preserving deformation while in shear.

  Author

  Alejandro Cornejo & Lucia Barbu

Constructor & Destructor Documentation

DruckerPragerPlasticPotential() [1/2]

template<SizeType TVoigtSize = 6>

Kratos::DruckerPragerPlasticPotential< TVoigtSize >::DruckerPragerPlasticPotential ( )

inline

Initialization constructor.

DruckerPragerPlasticPotential() [2/2]

template<SizeType TVoigtSize = 6>

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

inline

Copy constructor.

~DruckerPragerPlasticPotential()

template<SizeType TVoigtSize = 6>

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

inlinevirtual

Destructor.

Member Function Documentation

CalculatePlasticPotentialDerivative()

template<SizeType TVoigtSize = 6>

static void Kratos::DruckerPragerPlasticPotential< TVoigtSize >::CalculatePlasticPotentialDerivative ( const array_1d< double, VoigtSize > &  rPredictiveStressVector, const array_1d< double, VoigtSize > &  rDeviator, const double  J2, array_1d< double, VoigtSize > &  rGFlux, ConstitutiveLaw::Parameters &  rValues  )

inlinestatic

This script calculates the derivatives of the plastic potential according to NAYAK-ZIENKIEWICZ paper International journal for numerical methods in engineering vol 113-135 1972. As: DF/DS = c1*V1 + c2*V2 + c3*V3.

Parameters

rPredictiveStressVector	The predictive stress vector S = C:(E-Ep)
rDeviator	The deviatoric part of the stress vector
J2	The second invariant of the rDeviator
rGFlux	The derivative of the plastic potential
rValues	Parameters of the constitutive law

Check()

template<SizeType TVoigtSize = 6>

static int Kratos::DruckerPragerPlasticPotential< TVoigtSize >::Check ( const Properties &  rMaterialProperties )

inlinestatic

This method defines the check to be performed in the plastic potential.

Returns

0 if OK, 1 otherwise

KRATOS_CLASS_POINTER_DEFINITION()

template<SizeType TVoigtSize = 6>

Kratos::DruckerPragerPlasticPotential< TVoigtSize >::KRATOS_CLASS_POINTER_DEFINITION

(

DruckerPragerPlasticPotential< TVoigtSize >

)

Counted pointer of DruckerPragerPlasticPotential.

operator=()

template<SizeType TVoigtSize = 6>

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

inline

Assignment operator.

Member Data Documentation

Dimension

template<SizeType TVoigtSize = 6>

constexpr SizeType Kratos::DruckerPragerPlasticPotential< TVoigtSize >::Dimension = TVoigtSize == 6 ? 3 : 2

staticconstexpr

We define the dimension.

VoigtSize

template<SizeType TVoigtSize = 6>

constexpr SizeType Kratos::DruckerPragerPlasticPotential< TVoigtSize >::VoigtSize = TVoigtSize

staticconstexpr

The define the Voigt size.

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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/plastic_potentials/drucker_prager_plastic_potential.h