DATE     96/06/06

    Procédure @ANA_LIM                                            
    ------------------

    @ANA_LIM TAB1;

   TAB1.  BLOCAGES_MECANIQUES           MAXITERATION
          BRIDE                         MECARUINE
          CADIM                         MODELE
          CALCUL_COQUE                  PAS 
          CHARGEMENT                    PRECISION
          CONTRAINTES                   PROCEDURE_PERSO1
          CRITERE                       REPRISE
          DEPLA                         RESULTAT
          EVOLCL                        SIGLIM
          LISTCL                        
          LISTITER 
         
    Description :
    _____________

this procedure enables the users to calculate the limit load of a 
structure.
The modele is equivalent to a plastic perfect calcul monotonically 
converging to the solution. Version 04/96


    Contents :
    __________


TAB1   : TABLE type object.                                        

On input, TAB1 is used to define the options and the calculation
parameters. The indices of the TAB1 object are words (written in words). 

Here is their list :               

index          pointed object              comments
                  type
                        
MODELE          MMODEL          model object including the whole stucture
                                (MECANIQUE ELASTIQUE)
                                Indispensable

CHARGEMENT      CHPOINT         force field
                                Indispensable
        
BLOCAGES_MECANIQUES RIGIDITE    blockading matrice
                                Indispensable
                                        
CRITERE         MOT             plasticity criteria
                                VONMISES or tresca (write TRSCA)
                                default: VONMISES
                                
SIGLIM          FLOTTANT        flow limit 
                ou MCHAML       if MCHAML , the type must be SCALAIRE
                                on the stress calculation points in the
                                elements.
                                (see CHAN -> type "SCALAIRE"
                                and "STRESSES")
                                        default value: 1.

CALCUL_COQUE    MCHAML          shell elements computation
        stype CARACTERISTIQUES  geometrical properties of the shell(EPAI,
                                ALFA)  ALFA=2/3

PRECISION       FLOTTANT        precision           
                                        default value: 1e-3
        
MAXITERATION     ENTIER         maximum number of iterations      
                                        default value: 49
        
PAS              ENTIER         results steps      
                                        default value: 1
        
REPRISE         LOGIQUE         if REPRISE=VRAI it is a renewal of the 
                                computation. Example at the end
 
        
 On output, TAB1 enables the user to find again the results
 
index              pointed object       comments
                        type
                                  
MECARUINE       MCHAML          VMises when converging          
           sstype CONTRAINTES   
        
CONTRAINTES     MCHAML          stresses when converging

DEPLA           CHPO            Displacements when converging

YOUNG           MCHAML          young when converging
                

LISTITER        LISTREEL        iterations list
                                        
                                        
LISTCL          LISTREEL        limit loads list
                                        
                                        
EVOLCL          EVOLUTION       limit loads evolution 

                                        
CADIM           FLOTTANT        limit load parameter result of 
                                limit load/elastic load
        
        

"barometre" enables to verify that the  Von Mises stresses (or Tresca )
converge to the yield surface.

list of errors:

AVERT1:you are totally elastic (under the elastic limit)
AVERT2:the limit loads increase -> the theory is unavailable
AVERT3:not enough iterations


- at the end of a computation you can write 
table.REPRISE=vrai and recomputed with AL 


for more information David Plancq (42257492)
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