MultiaxialCyclicPlasticity3D.h

//----------------------------------------------------------------------------
//  XC program; finite element analysis code
//  for structural analysis and design.
//
//  Copyright (C)  Luis Claudio Pérez Tato
//
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//  developed by the  «Pacific earthquake engineering research center».
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//  of the original program (see copyright_opensees.txt)
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//
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// 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.           **
**                                                                    **
** ****************************************************************** */
                                                                        

/*----+----+----+----+----+----+----+----+----+----+----+----+----+----+----*
 |                                                                          | 
 |              MultiaxialCyclicPlasticity  NDMaterial                      |
 +                                                                          +
 |--------------------------------------------------------------------------|
 |                                                                          |
 +             Authors: Gang Wang  AND  Professor Nicholas Sitar            +
 |                                                                          |
 |             Department of Civil and Environmental Engineering            |
 +             Univeristy of California, Berkeley, CA 94720, USA            +
 |                                                                          |
 |             Email: wang@ce.berkeley.edu (G.W.)                           |
 |                                                                          | 
 +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----*/


#ifndef MultiaxialCyclicPlasticity3D_h
#define MultiaxialCyclicPlasticity3D_h

#include <utility/matrix/Vector.h>
#include <utility/matrix/Matrix.h>

#include <material/nD/soil/cyclicSoil/MultiaxialCyclicPlasticity.h>

namespace XC{
//
class MultiaxialCyclicPlasticity3D : public MultiaxialCyclicPlasticity
  {

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

  public : 

    MultiaxialCyclicPlasticity3D(int tag) ;
    //null constructor
    MultiaxialCyclicPlasticity3D( ) ;

    //full constructor
    MultiaxialCyclicPlasticity3D(   int    tag,
                  double rho,
                  double K,
                  double G,
                  double Su,
                  double Ho_kin,
                  double Parameter_h,
                  double Parameter_m,
                  double Parameter_beta,
                  double Kcoeff,
                  double viscosity = 0
                  ) ;
  

  //elastic constructor
  MultiaxialCyclicPlasticity3D( int tag, double rho, double K, double G ) ;

  //make a clone of this material
  NDMaterial* getCopy(void) const;

  //send back type of material
  const std::string &getType( ) const ;

  //send back order of strain in vector form
  int getOrder( ) const ;

  //get the strain and integrate plasticity equations
  int setTrialStrain( const Vector &strain_from_element) ;

  //unused trial strain functions
  int setTrialStrain( const Vector &v, const Vector &r ) ;
  int setTrialStrainIncr( const Vector &v ) ;
  int setTrialStrainIncr( const Vector &v, const Vector &r ) ;

  //send back the strain
  const Vector& getStrain(void) const;

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

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

  //this is mike's problem
  int setTrialStrain(const Tensor &v) ;
  int setTrialStrain(const Tensor &v, const Tensor &r) ;    
  int setTrialStrainIncr(const Tensor &v) ;
  int setTrialStrainIncr(const Tensor &v, const Tensor &r) ;
  const Tensor& getTangentTensor( ) ;
 
  private :

  //static vectors and matrices
  static Vector strain_vec ;     //strain in vector notation
  static Vector stress_vec ;     //stress in vector notation
  static Matrix tangent_matrix ; //material tangent in matrix notation

} ; //end of MultiaxialCyclicPlasticity3D declarations

} //end of XC namespace
#endif