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Delete and Remesh Options

There was an option in the legacy preferences to delete and remesh modified surfaces. In the new interface, there's "remesh," "rebuild," "delete," and "dissociate." I'm trying to avoid creating an orphan mesh when geometry is modified post-meshing. Any tips for how to achieve this?

Thanks,

Mandy

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HyperMesh

v2020.3

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Jason_Craanen

Hello,

Please have a look in the help

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/meshing/meshing_preferences_r.htm?zoom_highlight=meshing+preferences

only disassociate will leave mesh as orphan (unassociated to any geometry)

Mandy Kramer

Jason,

Thanks for the response. I'm working with line connectors to generate welds, and have been experiencing some orphan meshes where I don't expect them. I've attached an example model that corresponds to the below pictures (although it doesn't exhibit the exact orphan mesh issue that I've described).

This is a model of several flat plates to be connected via "weld" quad elements using the line connector tool. The free edges before connector realization look like this:

After realizing all 6 connectors at once, 2 of the connectors fail (see attached .hm file for more detail). If I'm troubleshooting this model build, my next step would be to read connector error messages, unrealize the connectors, and re-realize after addressing the issues. However, the warped elements that were generated during connector realization (indicated below) remain when I unrealize the connectors:

This leads me to remesh the two impacted surfaces, then move on to connector troubleshooting. I've had this happen on more complicated models (which include sensitive data I can't currently provide), and it has created overlapping patches of elements that are sometimes orphaned, but sometimes associated with the surface geometry.

In summary, I'm trying to use the line connector tool for welded connections in larger and more complicated topology models, and the inefficiency associated with the amount of times I'm required to realize/unrealize, reorder realizations, remesh, and delete rogue patches of elements is pushing me toward my previous workflow of generating surface topology for welded joints. Maybe I'm misunderstanding the intended workflow for lines connectors?

Thanks,

Mandy

2023-11-01 test model.hm

Community-Pasted-Attachment-1699544325564.png

Jason_Craanen

Jason,

Thanks for the response. I'm working with line connectors to generate welds, and have been experiencing some orphan meshes where I don't expect them. I've attached an example model that corresponds to the below pictures (although it doesn't exhibit the exact orphan mesh issue that I've described).

This is a model of several flat plates to be connected via "weld" quad elements using the line connector tool. The free edges before connector realization look like this:

After realizing all 6 connectors at once, 2 of the connectors fail (see attached .hm file for more detail). If I'm troubleshooting this model build, my next step would be to read connector error messages, unrealize the connectors, and re-realize after addressing the issues. However, the warped elements that were generated during connector realization (indicated below) remain when I unrealize the connectors:

This leads me to remesh the two impacted surfaces, then move on to connector troubleshooting. I've had this happen on more complicated models (which include sensitive data I can't currently provide), and it has created overlapping patches of elements that are sometimes orphaned, but sometimes associated with the surface geometry.

In summary, I'm trying to use the line connector tool for welded connections in larger and more complicated topology models, and the inefficiency associated with the amount of times I'm required to realize/unrealize, reorder realizations, remesh, and delete rogue patches of elements is pushing me toward my previous workflow of generating surface topology for welded joints. Maybe I'm misunderstanding the intended workflow for lines connectors?

Thanks,

Mandy

Mandy,

I would look at possibly cleaning up your original mesh. There is something going on with the green plate about half way up. I don't know if that is causing the issue, but I was not able to reproduce once I cleaned that up.