Femoop: J:/Tecgraf/prj/femoop/trunk/elc/elcmitc9.h Source File

00001 // -------------------------------------------------------------------------
00002 // ElcMITC9.h - This header file contains the data structure for the 
00003 //              implementation of the Bucalem-Bathe 9-noded shell
00004 //              element, hereby called MITC9.
00005 //              
00006 // ------------------------------------------------------------------------
00007 // Remarks:
00008 //             
00009 // ------------------------------------------------------------------------
00010 // Reference: "Higher-Order MITC General Shell Elements", M.L.Bucalem and
00011 //             K.J.Bathe, IJNME, 36, 3729-3754 (1993)
00012 // ------------------------------------------------------------------------
00013 //
00014 // $Author: evandro $
00015 // $Revision: 1.1 $
00016 // $Date: 1999/04/12 14:48:47 $
00017 // $State: Exp $
00018 //
00019 // -------------------------------------------------------------------------
00020 
00021 #ifndef _ELCMITC9_H 
00022 #define _ELCMITC9_H 
00023 
00024 #include "gbldefs.h"
00025 #include "elcdsh3d.h"
00026 
00027 
00028 // -------------------------------------------------------------------------
00029 // Definition of MITC9 shell element
00030 
00031 class cElcMITC9 : public cElcDegShell3D
00032 {
00033  public:
00034                     cElcMITC9         ( eShapeType e );
00035   virtual          ~cElcMITC9         ( void ){ }
00036            void     Stiffness         ( double * );
00037            void     CalcIntPtStress   ( void );
00038            void     CalcIntPtStress   ( cIntPt *, sTensor * );
00039             int     InternalForce     ( double * );
00040   
00041  protected:
00042  sNatCoord TyingPts_ms [6]; // membrane and transverse shear
00043  sNatCoord TyingPts_sm [4]; // in plane shear (r-s plane)
00044 
00045  protected:
00046           void      BMatrix           ( sNatCoord *, double **, double **,
00047                                         double *, sDerivNat *, double *,
00048                                         double *, double **, double ** );
00049           void      BMatrix           ( sNatCoord *, double **, double **,
00050                                         double *, sDerivNat *, 
00051                                         double *, double *, 
00052                                         double *, double *, 
00053                                         double *, double **, 
00054                                         double ** );
00055                              
00056           void      CalcBSampMemb     ( double, double **, double ** ); 
00057           void      CalcBSampShMemb   ( double, double ** );
00058           void      CalcBSampShear    ( double **, double ** );
00059           void      TyingFuncs        ( double , double, double * );
00060           void      TyingFuncsSm      ( double , double, double * );
00061 };
00062 
00063 #endif
00064