**Coreform Cubit Version 2022.4 Platform: Linux RHEL
Issue
I am trying my first experiment using CUBIT to generate bezier u-splines for IGA in LS-DYNA. I am following the instructions in this video using my own geometry:
This worked well in terms of the meshing. When I use the export command:
export uspline 1000 bext “uspline.k” dyna_cards, I successfully get the two files written to disk. However, when I *INCLUDE_BEZIER into my DYNA model, no geometry, nodes, or elements are visible in LS-PREPOST.
I’m not entirely sure this is a CUBIT problem or LS-PREPOST problem but I thought I’d start here.
I have more information from DYNA:
“coreform is writing the older card which we are not currently supported, instead it need to write another three IGA cards and the IGA SOLID card included in the above file, there is no workaround for this as we are developing the featured to enable such conversion down the line”
So apparently the issue is that the compatibility between the codes is broken.
To visualize the BEXT file in LS-PrePost, the BEXT file needs to have the correct version specified. The very first line of every BEXT file should look like B E X T 2.x. Up until a recent release of Cubit we were writing BEXT files with B E X T 2.0, which could not be visualized in PrePost. So your options are to either manually edit each BEXT file you have, or install the latest version of Cubit, which will write the BEXT files with the correct version. Hopefully that works for you
Another option for visualization is to run the files up through initialization in LS-DYNA. That will create a vis_bshl.k and/or a vis_bsld.k. These .k files can be read in to LS-PrePost to visualize your model.
), I could have sworn I read “Bezier curve” in your original post.