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$$$$ EXCF     NOTICE  PASCAL    13/11/08    21:15:35     7862           
                                             DATE     13/11/08

    Operateur EXCF                           Voir aussi : IMPF FRIG
    --------------                                        IMPO   
     CHPOI1 = EXCF RIG1 DEPL1 MODE1 CHAM1 (CHPOI2);


    Description :
    ____________

    EXCF is used to calculate a force field of friction (CHPOINT type)
    using the friction stiffness RIG1, the deplacement field DEPL1
    (CHPOINT type), the contact-friction model MODE1 and the friction
    properties field CHAM1 (MCHAML type).

    A minimum field of friction forces can be given : CHPOI2.
    
    Observation :
    ___________

    EXCF is used in UNPAS. There is little reason to use it directly.