ElasticIsotropicPlaneStrain2D.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».
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//  of the original program (see copyright_opensees.txt)
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//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details. 
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//
// 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)                     **
**                                                                    **
** ****************************************************************** */
                                                                        
// $Revision: 1.5 $
// $Date: 2002/12/05 22:49:09 $
// $Source: /usr/local/cvs/OpenSees/SRC/material/nD/ElasticIsotropicPlaneStrain2D.h,v $
                                                                        
                                                                        
#ifndef ElasticIsotropicPlaneStrain2D_h
#define ElasticIsotropicPlaneStrain2D_h

// File: ~/material/ElasticIsotropicPlaneStrain2D.h
//
// Written: MHS
// Created: Feb 2000
// Revision: A
//
// Description: 
//
// What: "@(#) ElasticIsotropicPlaneStrain2D.h, revA"

#include "ElasticIsotropic2D.h"

namespace XC {
//
class ElasticIsotropicPlaneStrain2D : public ElasticIsotropic2D
  {
  private:
    static Vector sigma;        // Stress vector ... class-wide for returns
    Vector epsilon;         // Trial strains
  public:
    ElasticIsotropicPlaneStrain2D(int tag, double E, double nu, double rho);
    ElasticIsotropicPlaneStrain2D(int tag= 0);

    int setTrialStrainIncr(const Vector &v);
    int setTrialStrainIncr(const Vector &v, const Vector &r);
    const Matrix &getTangent(void) const;
    const Matrix &getInitialTangent(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;
  };
} // end of XC namespace


#endif