release constraints at second step

[wisonyang]

Hi, everybody,

I defined coupling constraint in the first step in order to give
proper boundary conditions, but i need to release this coupling
(point to nodes) in the following steps. Does anybody know how to do
that?

Also I need to establish another coupling till the second step, but
not at first step, Is there anyway to do that using ABAQUS/CAE?

Thanks a lot

Wison




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[george jefferson]

I don't know about CAE, but you can do these things with *EQUATION. The
trick is to add a dummy node into the equation, then add/remove boundary
constraints
on the dummy node. You can also work with MPC user subroutines.

Post by wisonyang
Hi, everybody,
I defined coupling constraint in the first step in order to give
proper boundary conditions, but i need to release this coupling
(point to nodes) in the following steps. Does anybody know how to do
that?
Also I need to establish another coupling till the second step, but
not at first step, Is there anyway to do that using ABAQUS/CAE?
Thanks a lot
Wison
http://groups.yahoo.com/group/abaqus
Yahoo! Groups Links

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[Darwid Halim]

Hi,

You can release that constraint with

*model change, remove, type=contact pair
your slave nodes, your master nodes

Darwid Halim

Post by george jefferson
I don't know about CAE, but you can do these things
with *EQUATION. The
trick is to add a dummy node into the equation, then
add/remove boundary
constraints
on the dummy node. You can also work with MPC user
subroutines.

Post by wisonyang
Hi, everybody,
I defined coupling constraint in the first step in

order to give

Post by wisonyang
proper boundary conditions, but i need to release

this coupling

Post by wisonyang
(point to nodes) in the following steps. Does

anybody know how to do

Post by wisonyang
that?
Also I need to establish another coupling till the

second step, but

Post by wisonyang
not at first step, Is there anyway to do that using

ABAQUS/CAE?

Post by wisonyang
Thanks a lot
Wison
http://groups.yahoo.com/group/abaqus
Yahoo! Groups Links

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[Fernando Romero Marina]

Hi,

Go to the BC Manager, then go to the square below Step-2 and click desactivate. It will change from propagated to inactive.

Define your BC in the second step, in the BC Manager check that it will work only where you want to.

Hope this help you

wisonyang <***@hotmail.com> wrote:
Hi, everybody,

I defined coupling constraint in the first step in order to give
proper boundary conditions, but i need to release this coupling
(point to nodes) in the following steps. Does anybody know how to do
that?

Also I need to establish another coupling till the second step, but
not at first step, Is there anyway to do that using ABAQUS/CAE?

Thanks a lot

Wison