LinearPlasticViscoelasticNormalSpecies.h

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// This file is part of the MercuryDPM project (https://www.mercurydpm.org).
// Copyright (c), The MercuryDPM Developers Team. All rights reserved.
// License: BSD 3-Clause License; see the LICENSE file in the root directory.
 
#ifndef LinearPlasticViscoelasticNormalSpecies_H
#define LinearPlasticViscoelasticNormalSpecies_H
 
#include "Species/NormalForceSpecies/BaseNormalForce.h"
#include "Math/ExtendedMath.h"
#include "Interactions/NormalForceInteractions/LinearPlasticViscoelasticInteraction.h"
#include "Species/FrictionForceSpecies/SlidingFrictionSpecies.h"
#include "Math/Helpers.h"
 
 
class LinearPlasticViscoelasticNormalSpecies : public BaseNormalForce
{
public:
    typedef LinearPlasticViscoelasticInteraction InteractionType;
    
    LinearPlasticViscoelasticNormalSpecies();
    
    LinearPlasticViscoelasticNormalSpecies(const LinearPlasticViscoelasticNormalSpecies& p);
    
    ~LinearPlasticViscoelasticNormalSpecies();
    
    void read(std::istream& is);
    
    void write(std::ostream& os) const;
    
    std::string getBaseName() const;
 
// Species-specific functions
    
    void mix(LinearPlasticViscoelasticNormalSpecies* S, LinearPlasticViscoelasticNormalSpecies* T);
    
    void setCollisionTimeAndRestitutionCoefficient(Mdouble tc, Mdouble eps, Mdouble mass);
    
    void setStiffnessAndRestitutionCoefficient(Mdouble k_, Mdouble eps, Mdouble mass);
    
    void setRestitutionCoefficient(double eps, Mdouble mass);
    
    Mdouble getCollisionTime(Mdouble mass) const;
    
    Mdouble getRestitutionCoefficient(Mdouble mass) const;
 
//setters and getters
    
    void setPlasticParameters(Mdouble loadingStiffness, Mdouble unloadingStiffnessMax, Mdouble cohesionStiffness,
                              Mdouble penetrationDepthMax);
    
    Mdouble getLoadingStiffness() const;
    
    Mdouble getUnloadingStiffnessMax() const;
    
    Mdouble getCohesionStiffness() const;
    
    Mdouble getPenetrationDepthMax() const;
    
    void setLoadingStiffness(Mdouble loadingStiffness);
    
    void setUnloadingStiffnessMax(Mdouble unloadingStiffnessMax);
    
    void setCohesionStiffness(Mdouble cohesionStiffness);
    
    void setPenetrationDepthMax(Mdouble penetrationDepthMax);
    
    void setDissipation(Mdouble dissipation);
    
    MERCURYDPM_DEPRECATED void setLoadingStiffnessAndDissipation(helpers::KAndDisp new_);
    
    Mdouble computeTimeStep(Mdouble mass);
    
    Mdouble getDissipation() const;
 
    Mdouble computeBondNumberMax(Mdouble harmonicMeanRadius, Mdouble gravitationalAcceleration) const;
 
    bool getDoConstantUnloadingStiffness() const {return doConstantUnloadingStiffness_;}
 
    void setDoConstantUnloadingStiffness(bool doConstantUnloadingStiffness) {doConstantUnloadingStiffness_ = doConstantUnloadingStiffness;}
 
private:
    Mdouble loadingStiffness_;
    
    Mdouble unloadingStiffnessMax_;
    
    Mdouble cohesionStiffness_;
    
    Mdouble penetrationDepthMax_;
    
    Mdouble dissipation_;
 
    //whether unloading stiffness is variable (Luding) or constant (WaltonBraun)
    bool doConstantUnloadingStiffness_ = false;
};
 
#endif