Learning Forum

[Ben_Ben]

I am currently having a workflow issue. I have simplified it down so it is easier to explain.

I have to do a simulation geometry A and geometry B. Geometry A is fixed at the sides and Geometry B is inflated with pressure. Frictionless contact is applied between A and B. 

Geometery A is comprised of three shell bodies of differing material properties. But they shared topology and have a coincident mesh. Geometry A is the picture below.

Geometry B is comprised of 1 shell body. Geometry B is the result of previous complex simulations. Geometry B is included into the model with Dynain. Geometry B is the image below.

The issue arises here. I can't combine a Dynain geometry (geom B) with a geometry from spaceclaim (geom A). To get around this I performed a small relevant part of the simulation on Geom A so that I could access it as a Dynain file. I then combined the two Dynain files from Geom A and B. 

The next issue arises here. When you access geometry via Dynain any bodies that share coincident nodes are combined into one body. So for geom A, I lose the three individual parts and they are combined into one. This means I can't then apply differing material properties to the parts. See the result of accessing geom A from Dynain below.

 

Questions:
- Can I combine Geom A and Geom B in a different way? 

- Is there anyway to maintain the individual bodies from Geom A after dynain?

[Reno Genest]

Hello Ben,

You can create geometry A using a Mechanical Model system, import the dynain (geometry B) using an External Model system, and combine them together in an LS-DYNA system:

Note that you will have to rename the dynain file to dynain.k to be able to import it using the External Model system.

Have you tried the above? I am using Ansys WB 2023R1 and the above workflow works.

Also, make sure to set the mesh preference to "Explicit" in the Mechanical Model system:

 

Let me know how it goes.

 

Reno.

[Ben_Ben]

Hi Reno, 

Just updated my model and it ran to completion. Thank you so much for this suggestion!

Kind Regards, 

Ben

[Reno Genest]

Hello Ben,

Sounds good. I am glad it worked  for you.

Have a good day!

 

Reno.