MultiLinearKp.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/>.
//----------------------------------------------------------------------------
// MultiLinear.h: interface for the MultiLinear class.
//


#ifndef MultiLinearKp_h
#define MultiLinearKp_h

#include <material/yieldSurface/plasticHardeningMaterial/PlasticHardeningMaterial.h>
#include <cmath>
#include "utility/matrix/Vector.h"


namespace XC {

//
class MultiLinearKp : public PlasticHardeningMaterial
  {
  public:
    MultiLinearKp(int tag);
    MultiLinearKp(int tag, Vector &sum_plas_defo, Vector &kp);
    
    double getTrialPlasticStiffness();
    PlasticHardeningMaterial *getCopy(void);
    void Print(std::ostream &s, int flag =0);
  private:
    Vector sumPlasDefo;
    Vector Kp;
    int numPoints;
  };
} // end of XC namespace

#endif