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$$$$ BSIG     NOTICE  CHAT      11/09/12    21:15:14     7124           
                                             DATE     11/09/12
                                             
  Operateur BSIGMA                                  Voir aussi :
    ----------------   
      FORC1 =  BSIGMA MODL1 SIG1 ( CAR1 ) (HOO1) ;


    Description :
    ___________

    The BSIGMA operator calculates the nodal force field
 resulting from a stress field integration.


      Contents :
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      MODL1 : model object (MMODEL type).

      SIG1  : stress field (MCHAML type, CONTRAINTES 
              subtype)

      CAR1  : field of geometrical properties (MCHAML type,
              CARACTERISTIQUES subtype) required for some elements
              (beams, shells...)
              It is also composed of the material properties for 
              the DST shell element in absence of the field of
              Hooke matrices.
              It is also composed of the phases parameters for a
              MELANGE PALLELE modelling when the stress field 
              includes each phase stresses rather than the 
              overall stresses. 

      HOO1  : field of Hooke matrices required for the DST shell
              when CAR1 does not contain the material 
              characteristics (MCHAML type, MATRICE DE HOOKE
              subtype)

      FORC1 : field of nodal forces (CHPOINT type)