ATLAS

topol_file : topology file

Brief description : defines the material index and the nodal connections for each element.
Additional information : the file path must be written in the topol_list file.
File type : formatted ASCII depending on the number of nodal connections per element NC_TYPE (NC_TYPE depends on ELE_TYPE, see 3D Elements for details). In Fortran language, the formats for the header and a row of the bulk are '(i10,(20+10*NC_TYPE)a)' and '((20+NC_TYPE)i10)', respectively.
Parameters to be set :

NAME	TYPE	DESCRIPTION	UM
`N_ELE`	integer	number of elements defined in the file	-
`ELE_IND[N_ELE]`	integer	element indeces	-
`ELE_MAT[N_ELE]`	integer	element material indeces	-
`ELE_CON[NC_TYPE,N_ELE]`	integer	element nodal connections	-

File structure :

N_ELE
ELE_IND[1] ELE_MAT[1] ELE_CON[NC_TYPE,1]
ELE_IND[2] ELE_MAT[2] ELE_CON[NC_TYPE,2]
...

Example [ELE_TYPE = 1] : this example defines a single topolgy file with standard 4-noded tetrahedral elements tet4 :

     96000
         1         2         1        22        23       862
         2         2       862       883       884        23
         3         2        22        23       883       862
       ...

Example [ELE_TYPE = 2] : this example defines a single topolgy file with standard 8-noded hexahedral elements hex8 :

     16000
         1         1         1        22        23         2       862       883       884       863
         2         1         2        23        24         3       863       884       885       864
         3         1         3        24        25         4       864       885       886       865
       ...