3D Connexion Version 6.6

*USER ELEMENT

Second line if the active degrees of freedom are differentat subsequent nodes:

1. Enterthe positi on in the connectivity list (node position on the element) where the new list of

active degrees of freedom ﬁrst applies.

2. Enterthe 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’sManual

•“UEL,” Section 1.1.19 of the ABAQUS User SubroutinesReference 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,wherenis a positive integer less than 10000. To

use this element type, set TYPE=Unon 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 subroutineUEL at

any node point of the element. ABAQUS/Standard assigns space to store the coordinate values at

all the nodes associated with elements ofthis type. Thedefault is COORDINATES=1.

ABAQUS/Standard will change the value of COORDINATES to be the maximum of the

user-speciﬁed value of the COORDINATESparameter 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=1and

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 theactive degrees of freedom of the user element

are 11 and 12, the value of COORDINATESwill remain as 2.

IPROPERTIES

Set this parameter equal to the number of integerproperty values needed as data in user subroutine

UEL to deﬁne such an element. The de fault is I PROPERTIES=0.

20.5–3

ABAQUS Version 6.1 Module: ID:

Printed on: