ABAQUS Volume II: I–Z - Manual (Page 593)

*USER ELEMENT
Second line if the active degrees of freedom are different at subsequent nodes:
1. Enter the position in the connectivity list (node position on the element) where the new list of
active degrees of freedom first applies.
2. Enter the new list of active degrees of freedom.
Repeat the second data line as often as necessary.
Introducing a general user-defined element
References:
•
“User-defined elements,” Section 26.15.1 of the ABAQUS Analysis User’s Manual
•
“UEL,” Section 1.1.19 of the ABAQUS User Subroutines Reference Manual
•
*ELEMENT
•
*UEL PROPERTY
Required parameters:
TYPE
Set this parameter equal to the element type key used to identify this element on the *ELEMENT
option. The format of this type key must be Un, where n is a positive integer less than 10000. To
use this element type, set TYPE=Un on the *ELEMENT option.
NODES
Set this parameter equal to the number of nodes associated with an element of this type.
Optional parameters:
COORDINATES
Set this parameter equal to the maximum number of coordinates needed in user subroutine UEL at
any node point of the element. ABAQUS/Standard assigns space to store the coordinate values at
all the nodes associated with elements of this type. The default is COORDINATES=1.
ABAQUS/Standard will change the value of COORDINATES to be the maximum of the
user-specified value of the COORDINATES parameter or the value of the largest active degree of
freedom of the user element that is less than or equal to 3. For example, if COORDINATES=1 and
the active degrees of freedom of the user element are 2, 3, and 6, the value of COORDINATES
will be changed to 3. If COORDINATES=2 and the active degrees of freedom of the user element
are 11 and 12, the value of COORDINATES will remain as 2.
I PROPERTIES
Set this parameter equal to the number of integer property values needed as data in user subroutine
UEL
to define such an element. The default is I PROPERTIES=0.
20.5–3
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