shells/materials/MaterialBase.h

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/* -*- C++ -*- */
/*
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *                                   Fehmi Cirak
 *                        California Institute of Technology
 *                           (C) 2005 All Rights Reserved
 *
 * <LicenseText>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef MATERIALBASE_H
#define MATERIALBASE_H
#include <iosfwd>

#include "../utilities/PropertiesParser.h"


namespace shells {
    class MaterialBase;
}


class shells::MaterialBase {
public:
    MaterialBase(int numInternal, bool planeStress);
    virtual ~MaterialBase();
    
    // update stresses 
    virtual void updateStress(double * const stress, 
                              double const * const gstrain, 
                              double const dtime = 0.0,
                              double * const history=NULL,
                              double const * const gstrainPrv=NULL)=0;    

    virtual double density()=0;    

    // estimated young's modulus (used for computing stable time step)
    virtual double estimatedElasticityConst()=0;     
    
    // initialize history vars. and perform material specific initialization
    virtual void initialization(double * history)=0; 

    // I/O 
    void readMaterialParams(std::istream& is);
    void printMaterialParams(std::ostream& os);

    // accessors
    int numInternal() const {return _numInternal;}
    bool planeStress() const {return _planeStress;}
    
protected:
    template <typename T>
    void registerVariable(const std::string& name, T& variable) {
        _parser->registerPropertiesVar(name, variable);
    }
    
private:
    const int      _numInternal;
    const bool     _planeStress;
    
    utilities::PropertiesParser   *_parser;
};

#endif

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