Analysis coupling an implicit step and an explicit one

[Olivier_D]

Hi everybody,

I would like to know if it's possible to do an analysis within a first step
would be done with Abaqus Standard and a second one with Abaqus Explicit.
This using Abaqus CAE.

The purpose is to save time while large step time are used and then when
step times have to be very low (when damage occurs for instance) to be able
to switch into an explicit analysis.

If you know how to do it, could you advice me, please.

Thanks for your help

Olivier D.

[Dave Lindeman]

Yes and no. You can't define both Standard and Explicit steps within
the same model in CAE, but you can define a model for the first of the
steps, solve it, then create an input file that uses *IMPORT to bring
the model and state into the next solver (and define subsequent load
steps, etc.).

Alternatively, in 6.9 you can use the new co-simulation to couple
Standard and Explicit subregions simultaneously. See the release notes
and documentation for further information.

Regards,
Dave

-------------------------
Dave Lindeman
Lead Research Specialist
3M Company
3M Center 235-3F-08
St. Paul, MN 55144
651-733-6383

Post by Olivier_D
Hi everybody,
I would like to know if it's possible to do an analysis within a first step
would be done with Abaqus Standard and a second one with Abaqus Explicit.
This using Abaqus CAE.
The purpose is to save time while large step time are used and then when
step times have to be very low (when damage occurs for instance) to be able
to switch into an explicit analysis.
If you know how to do it, could you advice me, please.
Thanks for your help
Olivier D.
--
http://old.nabble.com/Analysis-coupling-an-implicit-step-and-an-explicit-one-tp26499902p26499902.html
<http://old.nabble.com/Analysis-coupling-an-implicit-step-and-an-explicit-one-tp26499902p26499902.html>
Sent from the Abaqus Users mailing list archive at Nabble.com.

------------------------------------

[alvoelefant]

There is a very good example in the manual:

Getting Started with Abaqus: Interactive Edition
13. Quasi-Static Analysis with Abaqus/Explicit

It is relatively easy to do. You need to create a copy of your model, import the results of the last step of the previous analysis. Then you redefine the boundary conditions and continue the calculation.

However, I have come across a case where it didn't work. I had problem importing the initial state of the model. See my message here:
http://tech.groups.yahoo.com/group/Abaqus/message/21817

Maybe Dave could also help me out with this problem.
Thanks in advance.

A

Post by Dave Lindeman
Yes and no. You can't define both Standard and Explicit steps within
the same model in CAE, but you can define a model for the first of the
steps, solve it, then create an input file that uses *IMPORT to bring
the model and state into the next solver (and define subsequent load
steps, etc.).
Alternatively, in 6.9 you can use the new co-simulation to couple
Standard and Explicit subregions simultaneously. See the release notes
and documentation for further information.
Regards,
Dave
-------------------------
Dave Lindeman
Lead Research Specialist
3M Company
3M Center 235-3F-08
St. Paul, MN 55144
651-733-6383

Post by Olivier_D
Hi everybody,
I would like to know if it's possible to do an analysis within a first step
would be done with Abaqus Standard and a second one with Abaqus Explicit.
This using Abaqus CAE.
The purpose is to save time while large step time are used and then when
step times have to be very low (when damage occurs for instance) to be able
to switch into an explicit analysis.
If you know how to do it, could you advice me, please.
Thanks for your help
Olivier D.
--
http://old.nabble.com/Analysis-coupling-an-implicit-step-and-an-explicit-one-tp26499902p26499902.html
<http://old.nabble.com/Analysis-coupling-an-implicit-step-and-an-explicit-one-tp26499902p26499902.html>
Sent from the Abaqus Users mailing list archive at Nabble.com.