PressureDependentElastic3D.h

// -*-c++-*-
//----------------------------------------------------------------------------
//  XC program; finite element analysis code
//  for structural analysis and design.
//
//  Copyright (C)  Luis C. 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.
//
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//  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/>.
//----------------------------------------------------------------------------
//===============================================================================
//# COPYRIGHT (C): Woody's license (by BJ):
//                 ``This    source  code is Copyrighted in
//                 U.S.,  for  an  indefinite  period,  and anybody
//                 caught  using it without our permission, will be
//                 mighty good friends of ourn, cause we don't give
//                 a  darn.  Hack it. Compile it. Debug it. Run it.
//                 Yodel  it.  Enjoy it. We wrote it, that's all we
//                 wanted to do.''
//
//# PROJECT:           Object Oriented Finite Element Program
//# PURPOSE:           Pressure dependent elastic isotropic material implementation:
//# CLASS:             PressureDependentElastic3D
//#
//# VERSION:           0.61803398874989 (golden section)
//# LANGUAGE:          C++
//# TARGET OS:         all...
//# DESIGN:            Zhaohui Yang, Boris Jeremic (jeremic@ucdavis.edu)
//# PROGRAMMER(S):     Zhaohui Yang, Boris Jeremic
//#
//#
//# DATE:              07July2001
//# UPDATE HISTORY:    22Nov2002 small fixes, formatting...
//#
//#
//===============================================================================


#ifndef PressureDependentElastic3D_h
#define PressureDependentElastic3D_h

#include <material/nD/elastic_isotropic/ElasticIsotropicMaterial.h>
#include <utility/matrix/nDarray/stresst.h>
#include <utility/matrix/nDarray/straint.h>

namespace XC {
//
class PressureDependentElastic3D: public ElasticIsotropicMaterial
  {
  private:
    static Vector sigma; 
    static Matrix D; 

    double exp0; 
    double p_ref; 
    double p_cutoff; 
    Vector Cepsilon;

    double p_n; // committed pressure
    mutable double p_n1; // trial pressure

  protected:
    int sendData(Communicator &);
    int recvData(const Communicator &);
  public:
    PressureDependentElastic3D (int tag,
                                double E,
                                double nu,
                                double rhop,
                                double expp = 0.6,
                                double pr = 100.0,
                                double pop = 0.5);
    PressureDependentElastic3D(int tag= 0);

    const Matrix &getTangent(void) const;
    const Vector &getStress(void) const;

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

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

    int sendSelf(Communicator &);
    int recvSelf(const Communicator &);

    void Print(std::ostream &s, int flag =0) const;
  };
} // end of XC namespace
#endif