3D Connexion Version 6.6

*REBAR LAYER

ORIENTATION

This parameter is meaningful only for rebar ingeneral shell, membrane, and surface elements. Set

this parameter equal to the name of an orientation deﬁnition that deﬁ nes the angular orientation of

the rebar on the data lines. If this parameter is omitted, the angular orientation of rebaron the data

lines is speciﬁed relative to the default projected local surface directions. This parameter is not

permitted with axisymmetric shell, axisymmetric membrane, and axisymmetric surface elements.

Data lines to deﬁne rebar layers:

First line:

1. Anam e that will be used to identify this rebar layer. This name can b e used in deﬁning rebar

prestressand output requests. Eachlayer of rebar must be given a separate name in a particular

element or element set.

2. Cross-sectionalarea of the rebar.

3. Spacingof rebar in the plane of the membrane, shell, or surface element. The value is given as

a length measure unless the GEOMETRY=ANGULAR parameter is speciﬁed,in which case

the value should be given in terms of angular spacing in degrees. Specify the spacing in the

uncured geometry if GEOMETRY=LIFTEQUATION.

4. Positionof the rebar in the shell secti ont hickness direction. This value is given as the distanc e

of the rebar from the middle surface of the shell, positive in the direction of the positive normal

to the shell. This value is modiﬁed if the NODAL THICKNESS parameter is included with

the *SHELL SECTION option for the underlying shell element. This entry has no meaning

for rebar in either membrane or surface elements.

5. Name ofthe m aterial forming thisrebar layer.

6. Forthree-dimensional shell, membrane, and surface elements, specify the angular orientation

of rebar (in degrees) betweenthe positive local 1-direction and the rebar. Specify the angle in

the uncured geometry if GEOMETRY=LIFTEQUATION.

The local 1-direction can be deﬁned by using the *ORIENTATION option and setting the

ORIENTATIONparameter equal to the orientation name. If the ORIENTATIONparameter is

omitted, the local 1-direction is deﬁned by the defaultprojected local surface directions. The

optional ORIENTATIONparameter given on th e *MEMBRANE SECTION and the *SHELL

SECTION options has no inﬂuence on the rebar angular orientation.

For axisymmetric shell, axisymmetric membrane, and axisymmetric surface elements, specify

the angular orientation of rebar from the meridional plane in degrees (0° is meridiona l, 90°

is circumferential). Positive rotation is about the positive normal to the shell, membrane, or

surface elements.

7. Theisoparametric direction from which the rebar angle output will be measured. The default

is 1.

8. Extensionrat io, e,for rebar deﬁned with GEOMETRY=LIFT EQUATION. This entry has no

meaning for rebar deﬁned using GEOMETRY=CONSTANTor GEOMETRY=ANGULAR.

17.11–2

ABAQUS Version 6.1 Module: ID:

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