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$$$$ PLAS     NOTICE  CHAT      11/09/12    21:17:37     7124           
                                             DATE     11/09/12
  Operateur PLAS                           Voir aussi :
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    SIG1 VAR1 DEPS1 = PLAS MODL1 SIG2 VAR2 EPS3 CAR1  (FLOT1) ;
        
    Description :
    _____________

    Given, on the one hand, an initial state plastically and
 statically acceptable featuring a stress field, an internal
 material stress field, and possibly other characteristics, 
 and on the other, a strain increment, the PLAS operator performs
 the flow in relation to the load surface.
    The flow relative to the load surface is characterized by
 a new stress field, new internal variables (plastically
 acceptable) and by an inelastic strain increment.



    Contents :
    __________


    MODL1 : model object (MMODEL type)

    SIG2  : stress field 
            (MCHAML type, CONTRAINTES subtype)

    VAR2  : field of internal variables
            (MCHAML type, VARIABLES INTERNES subtype)

    EPS3  : strain increment
            (MCHAML type, DEFORMATIONS subtype)

    CAR1  : description of the material and of geometrical 
            characteristics (MCHAML type, CARACTERISTIQUES
            subtype)

    FLOT1 : numerical precision used for the calculation
            (FLOTTANT type)
            by default FLOT1 equals 1.E-3

    SIG1  : new stress field 
            (MCHAML type, CONTRAINTES subtype)

    VAR1  : new internal variables 
            (MCHAML type, VARIABLES INTERNES subtype)

    DEPS1 : inelastic strain increment
            (MCHAML type, DEFORMATIONS subtype)


    Note :
    _______

    It is advisable to maintain the input and output data order.