drucker_prager_plastic_potential.h

Go to the documentation of this file.

// KRATOS ___                _   _ _         _   _             __                       _
//       / __\___  _ __  ___| |_(_) |_ _   _| |_(_)_   _____  / /  __ ___      _____   /_\  _ __  _ __
//      / /  / _ \| '_ \/ __| __| | __| | | | __| \ \ / / _ \/ /  / _` \ \ /\ / / __| //_\\| '_ \| '_  |
//     / /__| (_) | | | \__ \ |_| | |_| |_| | |_| |\ V /  __/ /__| (_| |\ V  V /\__ \/  _  \ |_) | |_) |
//     \____/\___/|_| |_|___/\__|_|\__|\__,_|\__|_| \_/ \___\____/\__,_| \_/\_/ |___/\_/ \_/ .__/| .__/
//                                                                                         |_|   |_|
//
//  License:         BSD License
//                   license: structural_mechanics_application/license.txt
//
//  Main authors:    Alejandro Cornejo & Lucia Barbu
//
 
#pragma once
 
// System includes
 
// Project includes
#include "includes/checks.h"
#include "generic_plastic_potential.h"
 
namespace Kratos
{
 
 
    // The size type definition
    typedef std::size_t SizeType;
 
 
 
 
template <SizeType TVoigtSize = 6>
class DruckerPragerPlasticPotential
{
  public:
 
    static constexpr SizeType Dimension = TVoigtSize == 6 ? 3 : 2;
 
    static constexpr SizeType VoigtSize = TVoigtSize;
 
    KRATOS_CLASS_POINTER_DEFINITION(DruckerPragerPlasticPotential);
 
 
    DruckerPragerPlasticPotential()
    {
    }
 
    DruckerPragerPlasticPotential(DruckerPragerPlasticPotential const &rOther)
    {
    }
 
    DruckerPragerPlasticPotential &operator=(DruckerPragerPlasticPotential const &rOther)
    {
        return *this;
    }
 
    virtual ~DruckerPragerPlasticPotential(){};
 
 
 
    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
        )
    {
        const Properties& r_material_properties = rValues.GetMaterialProperties();
 
        array_1d<double, VoigtSize> first_vector, second_vector, third_vector;
 
        AdvancedConstitutiveLawUtilities<VoigtSize>::CalculateFirstVector(first_vector);
        AdvancedConstitutiveLawUtilities<VoigtSize>::CalculateSecondVector(rDeviator, J2, second_vector);
 
        const double dilatancy = r_material_properties[DILATANCY_ANGLE] * Globals::Pi / 180.0;
        const double sin_dil = std::sin(dilatancy);
        const double Root3 = std::sqrt(3.0);
 
        const double CFL = -Root3 * (3.0 - sin_dil) / (3.0 * sin_dil - 3.0);
        const double c1 = CFL * 2.0 * sin_dil / (Root3 * (3.0 - sin_dil));
        const double c2 = CFL;
 
        noalias(rGFlux) = c1 * first_vector + c2 * second_vector;
    }
 
    static int Check(const Properties& rMaterialProperties)
    {
        KRATOS_ERROR_IF_NOT(rMaterialProperties.Has(DILATANCY_ANGLE)) << "DILATANCY_ANGLE is not a defined value" << std::endl;
 
        return 0;
    }
 
 
 
 
 
 
  protected:
 
 
 
 
 
 
 
 
  private:
 
 
 
 
 
 
 
 
}; // Class GenericYieldSurface
 
 
 
 
 
} // namespace Kratos.