An Object Finite Element Library

Elas2DQ4.h

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/*==============================================================================

                                    O  F  E  L  I

                           Object  Finite  Element  Library

  ==============================================================================

   Copyright (C) 1998 - 2008 Rachid Touzani

   This program 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; Version 2 of the License.

   This program 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, write to the :

   Free Software Foundation
   Inc., 59 Temple Place - Suite 330
   Boston, MA  02111-1307, USA

  ==============================================================================

                         Definition of class Elas2DQ4
             for Two-Dimensional Linearized Elasticity equations using
                       4-node quadrilateral finite element

  ==============================================================================*/


#ifndef __ELAS2DQ4_H
#define __ELAS2DQ4_H


#include "Equa_Solid.h"
#include "Quad4.h"
#include "Line2.h"

namespace OFELI {

class Elas2DQ4 : virtual public Equa_Solid<double,4,8,2,4>
{

 public :

    Elas2DQ4()
    {
       _quad = NULL;
               _ln = NULL;
#ifdef _OFELI_DEBUG
       std::clog << "An instance of class Elas2DQ4 is constructed.\n";
       std::clog << "File: " << __FILE__ << ", Line: " << __LINE__ << endl;
#endif
    }

    Elas2DQ4(const Element *el);

    Elas2DQ4(const Side *sd);

    Elas2DQ4(const Element *element, const Vect<double> &u, const double &time=0.);

    Elas2DQ4(const Side *side, const Vect<double> &u, const double &time=0.);

    ~Elas2DQ4();

    void PlaneStrain();

    void PlaneStrain(double E, double nu);

    void PlaneStress();

    void PlaneStress(double E, double nu);

    void LMassToLHS(double coef=1.);

    void LMassToRHS(double coef=1.);

    void LMass(double coef) { LMassToLHS(coef); LMassToRHS(coef); }

    void Mass(double coef=1.) { coef=1; cout << "Sorry, consistent mass matrix is not implemented !\n"; }

    void Deviator(double coef=1.);

//  To use for explicit formulations
    void DeviatorToRHS(double coef=1.);

    void Dilatation(double coef=1.);

    void DilatationToRHS(double coef=1.);

    void BodyRHS(UserData<double> &ud);

    void BodyRHS(const Vect<double> &bf, int opt=LOCAL_ARRAY);

    void BoundaryRHS(UserData<double> &ud);

    void BoundaryRHS(const Vect<double> &sf, int opt=LOCAL_ARRAY);

    void SignoriniContact(UserData<double> &ud, double coef=1.e07);

    void Strain(LocalVect<double,3> &eps);

    void Stress(LocalVect<double,3> &s, double &vm);

    void Stress(LocalVect<double,3> &sigma, LocalVect<double,3> &s, double &vm);

 private :

   double        _E1, _E2, _E3, _E6;
   Quad4         *_quad;
   Line2         *_ln;
   double        _g[2], _w[2], _xl[4], _yl[4];
   Point<double> _cg;
};

} /* namespace OFELI */

#endif

Copyright © 1998-2007 Rachid Touzani