Elastic.h

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// SPDX-License-Identifier: MIT
// Copyright (c) 2021-2025 MPM-Geomechanics Development Team
 
#ifndef ELASTIC_H_
#define ELASTIC_H_
 
#include "Materials/Material.h"
#include "Particle/Particle.h"
 
class Elastic: public Material {
 
public:
 
    Elastic(int id, double density, double young, double poisson);
    
    virtual ~Elastic();
    
    inline void setYoung(double young) { this->Young=young; }
    
    inline void setPoisson(double poisson) { this->Poisson=poisson; }
 
    inline double getShearModulus() const { return this->Young/2.0/(1.0+this->Poisson); }
    
    inline double getBulkModulus() const { return this->Young/3.0/(1.0-2.0*this->Poisson); }
    
    virtual void updateStress(Particle* particle) const;
    
    inline virtual Material::MaterialType getType() const { return Material::getType(); }
 
    virtual double getSoundSpeed( ) const;
    
protected:
    
    double Young; 
    
    double Poisson; 
};
 
inline Elastic::Elastic(int id, double density, double young, double poisson)
: Material(id, density, Material::MaterialType::ELASTIC)
{
    this->Young=young;
    this->Poisson=poisson;
}
 
inline Elastic::~Elastic() { }
 
#endif /* ELASTIC_H_ */