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$$$$ OUVFISS  NOTICE  AM        12/12/20    21:15:21     7631           
                                             DATE     12/12/20
                                             

    Procedure OUVFISS                          
                                                    

    OUVFISS ETAB (I) (|TR);
                     (|PRIN);


    Description :
    _____________

The OUVFISS procedure computes the crack openings fron the state of 
stress and the elastic characteristics of the material for each time 
step of the table ETAB

The hypothesis that a unic crack can cross an element and that the 
strain is elastique outside of the crack is made.

The result is the crack opening tensor (in the unit of 
length used for the computation).
The computation are made for all the time steps that are available into
the table except if the number of a time step is indicated.
If the option TR is mentioned, the result is the trace of the crack openings ten
If the option 'PRIN' is indicated, the crack openings tensor is writen
on the principal axis basis.
The method is built for the use of an energy regularized model 
(Hillerborg) but the result obtained with other models (non local) 
would be equally corrects.

More details can be found in the following paper that you are asked to
refer if you use this procedure.

M. Matallah , C. La Borderie and O. Maurel, "A practical method to 
estimate crack openings in concrete structures", 
Int. J. Numer. Anal. Meth. Geomech. (2009) doi: 10.1002/nag.876




    Comments :
    _____________

    ETAB   : result table from PASPAS.

    ETAB.OUV.I : Crack openings flied at the time step #i (field by element)

  
   Example of use:
    _______________
     ...
     ...
     PASAPAS ETAB;
     OUVFISS ETAB;
     I=DIME (ETAB . TEMPS);
     TRAC ETAB . OUV . (I-1) ETAB.MODELE;

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