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Inability to set SECTION=ELBOW for elbow elements in Abaqus/ CAE 6.11-3

Hello everybody,

I would like to model a simple pipe structure with any of
the elbow elements available in Abaqus, for instance the beam element ELBOW31.
In the Mesh module I successfully assign ELBOW31 as Element Type but it is also
needed to assign an elbow section in the Property module. The problem is that
when I create a Beam section in the list with the profiles I do not see
"Elbow". In the Abaqus manual for Beam Section it says "Set
SECTION=ELBOW for elbow elements, which are available only in
Abaqus/Standard." (http://mse-license1.mse.drexel.edu:2080/v6.7/books/key/default.htm?startat=ch02abk06.html#usb-kws-mbeamsection).
In my version Abaqus/ CAE 6.11-3, Abaqus/Standard is the product employed in
the simulation process so I don't understand why I can't see Elbow as an
available cross section profile for beam elements?

Can you give me a clue how could I employ the elbow elements
in my analysis?

Thank you for the help in advance!

Regards,

Yordan Venev

Comments

Hello again,

I got to know the solution for the problem I had.

An Elbow section cannot
be specified in /CAE. That’s why do so: specify the beam as a pipe-section in
/CAE. Then you have to write out the inp-file from /CAE using:

Job -> Write input

Then you get a inp-file
that you can edit like:

** Two, or more, asterix
give a comment line.

***Beam Section,
elset=_PickedSet2, material=steel, temperature=GRADIENTS, section=PIPE

*Beam Section,
elset=_PickedSet2, material=steel, temperature=GRADIENTS, section=elbow

Data line 1

Data line 2

Where according to the
Abaqus 6.11 keyword manual *Beam section:

Data lines for ELBOW
sections:

First line:

1. Outside radius of the
pipe, r.

2. Pipe wall thickness,
t.

3. Elbow torus radius,
R, measured to the pipe axis. For a straight pipe, set .

This value is not
written for the Pipe-section so it have to be added.

Second line:

Enter the coordinates of
the point of intersection of the tangents to the straight pipe segments

adjoining the elbow, or,
if this section is associated with straight pipes, the coordinates of a

point off the pipe axis.
The second cross-sectional axis will lie in the plane thus defined, with

its positive direction
pointing toward this off-axis point.

1. First coordinate of
the point.

2. Second coordinate of
the point.

3. Third coordinate of
the point.

( Also use:

*Preprint, echo=NO,
model=YES, history=YES, contact=NO

So that you can look in
the dat-file that all detailed input that is written there is what you
specified. )

After you have made
these change save the inp-file under a new name and then run Abaqus using:

abaqus job=new_name

or:

abq6113 job=new_name

 

Best regards,

Yordan Venev

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