J:/Tecgraf/prj/femoop/trunk/elc/elcaxsh.h

// -------------------------------------------------------------------------
// ElcAxSh.h - This header file contains data structure for axisymmetric
//             shell finite element classes.
// -------------------------------------------------------------------------
//
// $Author: joaquim $
// $Revision: 1.1 $
// $Date: 1998/02/16 20:21:11 $
// $State: Exp $
//
// -------------------------------------------------------------------------
// Description:
// This file contains the data structure to the axisymmetric shell
// finite element superclass. The various finite elements for 
// axisymmetric shell structural analysis should be derived
// from this parent class.
// -------------------------------------------------------------------------

#ifndef  _ELCAXSH_H
#define  _ELCAXSH_H

#include "gbldefs.h"
#include "element.h"
#include "shape.h"


// -------------------------------------------------------------------------
// Definition of a Axisymmetric Shell Element Class:

class cElcAxShell : public cElement
{
 public:
                    cElcAxShell       ( eShapeType );
  virtual          ~cElcAxShell       ( void );
  virtual  void     CreateElement     ( eShapeType ) { }
           double   Thickness         ( void ) { return _dThickness; }
           double   GetVol            ( void );
  virtual  void     Stiffness         ( double * ) { };
  virtual  void     BMatrix           ( double, double, double ** ){ };
  virtual  void     CalcIntPtStress   ( void ) { };  
           void     NodeStress        ( sTensor * ); 
           void     Extrapolate       ( double **, double **);
  virtual  int      InternalForce     ( double * ) { return 0;}
  virtual  double   DerivVolAm        ( cNode *, int ){ return 0.0; }
  virtual  void     DerivStress       ( cNode * , int, double, double *,
                                        sTensor * ) { }
 protected:
           void     GetSamCoord       ( cNode *, int, double, double *,
                                        sNodeCoord *, sNodeCoord * );
           void     TRMatrix          ( void );

};

#endif

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