DATE     95/09/18

    Opérateur CAPI                             See also :PICA 
    --------------

    CH2 = CAPI MODL1 CH1 DEP1 ;

    Description :
    _____________

    The CAPI operator makes it possible to calculate a Piola
 Kirchhoff stress field from a Cauchy stress field, or a
 Green-Lagrange strain field from an Almansi-Euler strain field.


   Contents :
   __________

    MODL1 :  MMODEL type object

    CH1   :  Cauchy stress field (MCHAML type, CONTRAINTES
             subtype) or Almansi-Euler strain field (MCHAML
             type, DEFORMATIONS subtype)

    DEP1  :  displacement field for passing from the reference
             configuration to the current configuration
             (CHPOINT type)

    CH2   :  Piola Kirchhoff stress field (MCHAML type,
             CONTRAINTES subtype) or Green-Lagrange strain
             field (MCHAML type, DEFORMATIONS subtype)