DruckerPrager3D.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».
//
//  Except for the restrictions that may arise from the copyright
//  of the original program (see copyright_opensees.txt)
//  XC is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
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//  (at your option) any later version.
//
//  This software is distributed in the hope that it will be useful, but 
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details. 
//
//
// You should have received a copy of the GNU General Public License 
// along with this program.
// If not, see <http://www.gnu.org/licenses/>.
/* ****************************************************************** **
**    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.           **
**                                                                    **
** ****************************************************************** */


// $Revision: 1.1 $
// $Date: 2010-02-04 00:44:04 $
// $Source: /usr/local/cvs/OpenSees/SRC/material/nD/DruckerPrager3D.h,v $

// Written: K.Petek, U.Washington

//
// DruckerPrager3D isotropic hardening material class
// 


#include "DruckerPrager.h"

namespace XC {
//
class DruckerPrager3D : public DruckerPrager {

//-------------------Declarations-------------------------------

  public : 

  //null constructor
  DruckerPrager3D( ) ;

  //full constructor
  DruckerPrager3D(int tag, double bulk, double shear,
          double s_y, double r, double r_bar, double Kinfinity, double Kinit, 
          double d1, double d2, double H, double t, double massDen, double atm);


  //destructor
  ~DruckerPrager3D( ) ;

  NDMaterial *getCopy(void) const;
  const std::string &getType(void) const;
  int getOrder(void) const;

  int setTrialStrain(const Vector &strain_from_element);

  // Unused trialStrain functions
  int setTrialStrain(const Vector &v, const Vector &r);
    
  //send back the strain
  const Vector& getStrain( ) ;

  //send back the stress 
  const Vector& getStress( ) ;

  //send back the tangent 
  const Matrix& getTangent( ) ;
  const Matrix& getInitialTangent( ) ;

  };
} // end XC namespace