Manual pages | Cast3M

$$$$ PRIN     NOTICE  CHAT      11/09/12    21:17:44     7124           
                                             DATE     11/09/12
                                             
    Operateur PRIN                           Voir aussi : SIGM RTEN
    --------------                                        CALP    VMIS   
                                                          TRES    CARA   
                                                          @PLOTPRI   
                                                          @B_TPO2D   
       CHAM2 = PRIN CHAM1 MODL1 (CAR1) (MOT1) ;
       

    Description :
    ____________

    The PRIN operator calculates the principal stress field 
 associated with a strain field. It also supplies the user 
 with the direction cosines of the principal directions with
 respect to the general basis.

   For thin shells, the true principal stresses are
 computed from the generalized stresses.    


    Contents :
    _________

    CHAM1   : stress field 
              (MCHAML type, CONTRAINTES subtype)

    MODL1   : model object (MMODEL type)

    CAR1    : field of material and geometrical properties
              (MCHAML type, CARACTERISTIQUES subtype)

    MOT1    : key word (MOT type) which indicates where the stresses 
              are computed for the shells :

              'SUPE' : on top layer
              'MOYE' : on the mid-surface (by default)
              'INFE' : on bottom layer

              It may also indicate, in a two dimensionnal case, that the 3
              principal stresses must be ordered. In that case, give : 'TRID'

    CHAM2   : principal stress field
              (MCHAML type, PRINCIPALE subtype)

    Remark :     In a three dimensionnal case, the principal stresses are
    ________     supplied in a decreasing algebraic order, the first one
                 being the greatest one.

                 In a two dimensionnal case, the third principal stress
                 corresponds systematically to the direction perpendicular
                 to the plane. Therefore, only the first two principal
                 stresses are ordered, except if the word 'TRID' has been given.

                 The names of the principal stresses componants can be known
                 using the EXTR operator :  EXTR CHAM2 COMP ....