11.0 ELEMENT CONNECTIVITY DATA
NODAL_CONNECTIVITY
NODAL_CONNECTIVITY file_name = "<string>"
n, mat (n), ( ien(i,n), i = 1, nen ), ng
< etc..., terminate with a blank record >
Define the connectivity. Various generation schemes are available depending on NEN the number of nodes used to define the element. These are detailed hereafter.
Note Variable Default Description
(1) N [0] Element number
(2) MAT(N) [1] Geometric/material properties set number
IEN(1,N) [0] Number of 1st node
IEN(2,N) [0] Number of 2nd node
. . .
etc. . .
. . .
IEN(NEN,N) [0] Number of NENth node
(3) NG [0] Generation increment
= 0, no generation
≠ 0, generate data
Notes/
(1) All elements must be read in on an
element data record or generated. Terminate with a blank record.
(2) For Structural elements (see Section 9.3) for which both geometric and material properties are assigned to each element N:
MAT(N) = Material_set_number + Numel * Geometric_set_number
where Numel =
Number_of_elements.
(3) If the generation parameter is not equal to 0, a generation data record must be input next. Various generation scheme are available depending on NEN the number of nodes used to define the element. These are detailed hereafter.
11.2.1 Element Generation
Data for 1D Line Elements (NEN = 1, 2, or 3)
Note Variable Default Description
NEL (1) [0] Number
of elements 
0
INCEL (1) [0] Element number increment;
if = 0, set internally to 1
INC (1) [0] Node number increment;
if = 0, set internally to 1
11.2.2 Element Generation Data for 2D Plane
Elements (NEN = 3 or 4)
Element nodes must be listed in counterclockwise order (see Figure 9.2.0.1). See Figure 11.2.2.1 for a schematic representation of the generation scheme.
Note Variable Default Description
NEL (1) [0] Number
of elements in direction 1 0
INCEL (1) [0] Element number increment for direction 1;
if = 0, set internally to 1
INC (1) [0] Node number increment for direction 1;
if = 0, set internally to 1
NEL (2) [0] Number
of elements in direction 2 0
INCEL (2) [0] Element number increment for direction 2;
if = 0, set internally to NEL(1)
INC (2) [0] Node number increment for direction 2;
if = 0, set internally to (1 + NEL(1))*INC(1)
|
Figure
11.2.2.1 Element Generation |
11.2.3 Element Generation Data for 3D Solid
Elements (NEN = 8)
Element nodes must be listed in the order shown on Figure 9.2.0.1. See Figure 11.2.3.1 for a schematic representation of the generation scheme.
Note Variable Default Description
NEL (1) [0] Number
of elements in direction 1 0
INCEL (1) [0] Element number increment for direction;
if = 0, set internally to 1
INC (1) [0] Node number increment for direction 1;
if = 0, set internally to 1
NEL (2) [0] Number
of elements in direction 2 0
INCEL (2) [0] Element number increment for direction 2;
if = 0, set internally to NEL (1)
INC (2) [0] Node number increment for direction 2;
if = 0, set internally to (1+NEL(1))*INC(1)
NEL (3) [0] Number
of elements in direction 3 0
INCEL (3) [0] Element number increment for direction 3;
if = 0, set internally to NEL (1)*NEL (2)
INC (3) [0] Node number increment for direction 3;
if = 0, set internally to (1+NEL(2))*INC(2)
|
Figure 11.2.3.1 Element Generation |
Notes . .
Notes . .