Manual pages | Cast3M

$$$$ LIAI     NOTICE  FANDEUR   11/09/26    21:16:25     7107           
                                             DATE     11/09/26

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    | 1st possibility: creation of ordinary linkage elements |
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    GEO1 = LIAISON  (FLOT1) GEO2 GEO3  ;

    Description :
    _____________

    The LIAISON operator generates the set of linkage elements between
 two surfacic objects.

    Commentaire:
    ____________

    GEO2 | : surfacic objects (MAILLAGE type)
    GEO3 |

    GEO1   : generated object (MAILLAGE type)

    FLOT1  : proximity criterion between the two surfacic objects.
             by default, FLOT1 equals one tenth of the current density.

    Note:
    _____
  
    An element is created between one element of GEO2 and one element 
 of GEO3; the distance between their points is smaller than CRIT. 

    Use the RACCORD operator in case of line meshes (2D).

    For the creation of a joint element JOI4 (3D) :

         -GEO2 and GEO3 represent respectivelly surfaces 1 and 2 of the
element. These surfaces should be read in the same direction. This
direction is that of the boundary of surface 1. The numeration of the 
nodes of surface 1 must be such that the axes (1,2,N) make up a direct
trihedron, with N orientated positivelly in the direction of the
opening of the joint element,
   We define the following quantities :
 . axis 1 = vector connecting node 1 to node 2 of surface 1
 . axis 2 = vector connecting node 1 to node 4 of surface 1
 . axis N = vector normal to the plane defined by vectors 1 and 2
 . opening of the joint element = distancing movement of surface 1 
   from surface 2 when surface 2 is held fixed

         -To take into account initial free space x in a joint element,
GEO2 and GEO3 should have a distance x between them. In addition, x 
should be input as an initial normal inelastic strain before the use 
of the PASAPAS procedure. (See report DMT/93.655)


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    | 2nd possibility : creation of porous linkage elements       |
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    GEO1 = LIAISON  (FLOT1) GEO2 GEO3 GEO4  ;

    Description:
    ____________

    The LIAISON operator generates the set of linkage elements between
    three surfacic objects.

    Commentaire:
    ____________

    GEO2 | : surfacic objects (MAILLAGE type)
    GEO3 |
    GEO4 |

    GEO1   : generated object (MAILLAGE type)

    FLOT1  : proximity criterion between the two surfacic objects.
             by default, FLOT1 equals one tenth of the current density.

    Note:
    _____

    An element is created between one element of GEO2, one element 
    of GEO3 and one element of GEO4 if the distance between their points is
    smaller than CRIT. The GEO2 and GEO3 objects can be composed by 6 points
    triangles or 8 points rectangles. The GEO4 object can be composed by 3
    points triangles or 4 points rectangles.