ElasticMaterial.h

//----------------------------------------------------------------------------
//  XC program; finite element analysis code
//  for structural analysis and design.
//
//  Copyright (C)  Luis Claudio Pérez Tato
//
//  This program derives from OpenSees <http://opensees.berkeley.edu>
//  developed by the  «Pacific earthquake engineering research center».
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//  of the original program (see copyright_opensees.txt)
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//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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//
// You should have received a copy of the GNU General Public License 
// along with this program.
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//----------------------------------------------------------------------------
/* ****************************************************************** **
**    OpenSees - Open System for Earthquake Engineering Simulation    **
**          Pacific Earthquake Engineering Research Center            **
**                                                                    **
**                                                                    **
** (C) Copyright 1999, The Regents of the University of California    **
** All Rights Reserved.                                               **
**                                                                    **
** Commercial use of this program without express permission of the   **
** University of California, Berkeley, is strictly prohibited.  See   **
** file 'COPYRIGHT'  in main directory for information on usage and   **
** redistribution,  and for a DISCLAIMER OF ALL WARRANTIES.           **
**                                                                    **
** Developed by:                                                      **
**   Frank McKenna (fmckenna@ce.berkeley.edu)                         **
**   Gregory L. Fenves (fenves@ce.berkeley.edu)                       **
**   Filip C. Filippou (filippou@ce.berkeley.edu)                     **
**                                                                    **
** ****************************************************************** */
                                                                        
// $Revision: 1.4 $
// $Date: 2003/02/25 23:33:38 $
// $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/ElasticMaterial.h,v $
                                                                        
                                                                        
#ifndef ElasticMaterial_h
#define ElasticMaterial_h

// File: ~/material/ElasticMaterial.h
//
// Written: fmk 
// Created: 07/98
// Revision: A
//
// Description: This file contains the class definition for 
// ElasticMaterial. ElasticMaterial provides the abstraction
// of an viscoelastic uniaxial material,
// i.e. stress = E*strain + eta*strainrate
//
//
// What: "@(#) ElasticMaterial.h, revA"


#include <material/uniaxial/ElasticBaseMaterial.h>

namespace XC {
//
class ElasticMaterial : public ElasticBaseMaterial
  {
  private:
    double trialStrainRate;
    double eta; 
  protected:
    int sendData(CommParameters &);
    int recvData(const CommParameters &);


  public:
    ElasticMaterial(int tag, double E, double eta = 0.0);    
    ElasticMaterial(int tag, int classtag= MAT_TAG_ElasticMaterial);    
    ElasticMaterial(void);    

    int setTrialStrain(double strain, double strainRate = 0.0); 
    int setTrial(double strain, double &stress, double &tangent, double strainRate = 0.0); 
    double getStrainRate(void) const {return trialStrainRate;};
    double getStress(void) const;
    double getTangent(void) const {return E;}
    double getDampTangent(void) const {return eta;}

    int commitState(void);
    int revertToLastCommit(void);    
    int revertToStart(void);        

    UniaxialMaterial *getCopy(void) const;
    
    int sendSelf(CommParameters &);  
    int recvSelf(const CommParameters &);
    

    void Print(std::ostream &s, int flag =0);
    
    int setParameter(const std::vector<std::string> &argv, Parameter &param);
    int updateParameter(int parameterID, Information &info);
  };
} // end of XC namespace


#endif