DruckerPragerPlaneStrain.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
//  the Free Software Foundation, either version 3 of the License, or 
//  (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.           **
**                                                                    **
** Developed by:                                                      **
**   Frank McKenna (fmckenna@ce.berkeley.edu)                         **
**   Gregory L. Fenves (fenves@ce.berkeley.edu)                       **
**   Filip C. Filippou (filippou@ce.berkeley.edu)                     **
**                                                                    **
** ****************************************************************** */
                                                                        
// Written: Chris McGann
//          February 2011

#include "DruckerPrager.h"

namespace XC {
//
class DruckerPragerPlaneStrain : public DruckerPrager
 {

  public : 

  //null constructor
  DruckerPragerPlaneStrain();

  //full constructor
  DruckerPragerPlaneStrain(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 massDens, double atm);


  //destructor
  ~DruckerPragerPlaneStrain();

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

  private :

  // static vectors and matrices
  static Vector strain;
  static Vector stress;
  static Matrix tangent;
}; 
} // end XC namespace