Issue with Shell Elements Intersecting 3D Elements in HyperWorks Simulations

Ali_22006

Hi Team,

I've been exploring various features in HyperWorks, but I've hit a snag. I've encountered a situation where shell elements are intersecting or penetrating 3D elements. An example of this can be seen in the rubber ring tutorial available at the HyperWorks Solver documentation (refer to: Rubber Ring Tutorial in HyperWorks Solver Help).

Could this be a rendering issue within HyperWorks, and is there a way to manage this effectively? Any guidance on how to prevent this from happening would be greatly appreciated.

Paulo Libório

Hey Ali,

Seems alright here:

Have you changed anything in the tutorial model? Or is is like that straight from opening?

Please try downloading it from here: https://help.altair.com/hwsolvers/os/topics/solvers/os/rubber_ring_crush_slide_self_contact_os_tut_r.htm#reference_fdy_c1c_hjb

Kind Regards,
Paulo Libório.

Ali_22006

Hello Paulo,

I appreciate your prompt reply. Unfortunately, I'm also facing the same issue with a model that I cannot discuss in public forums. The same problem persists, and I'm at a loss for what could be causing it. Could you please offer some guidance or suggestions on what might be the root of this issue?

Ali_22006

Here is a snapshot of it: 

Ali_22006

It is when I am plotting the results in hyperview, during the animation it happens. 

Paulo Libório

Ali_22006 said:

It is when I am plotting the results in hyperview, during the animation it happens. 

Hey Ali,

If components are penetrating during results visualization, it means lack of or improper setup of contacts between them.

Use these videos as reference:

• HyperWorks 2021: Contact Setup
• EP 11: Auto Contact in HyperWorks 2022

Kind Regards,
Paulo Libório.

Ali_22006

Paulo Libório said:

Hey Ali,

If components are penetrating during results visualization, it means lack of or improper setup of contacts between them.

Use these videos as reference:

• HyperWorks 2021: Contact Setup
• EP 11: Auto Contact in HyperWorks 2022

Kind Regards,
Paulo Libório.

Hi Paulo,
In your opinion the connection setup in this tutorial: https://2023.help.altair.com/2023/hwsolvers/os/topics/solvers/os/rubber_ring_hwx_tutorial_r.htm#reference_mtw_vt2_nwb, Isn't correct? Because I used this tutorial and found the same intersection? 

Paulo Libório

Ali_22006 said:

Hi Paulo,
In your opinion the connection setup in this tutorial: https://2023.help.altair.com/2023/hwsolvers/os/topics/solvers/os/rubber_ring_hwx_tutorial_r.htm#reference_mtw_vt2_nwb, Isn't correct? Because I used this tutorial and found the same intersection? 

Ali,

I wouldn't say "not correct". Although, there's one setting in the PCONT property that might help with contact penetration. GPAD → THICK

And then, you can check Contact Deformation SPOS / Normal (Penetration) output to check actual values for penetration.

Visually, there's no penetration. But I can see from the contour that there's some. Is it acceptable? Should you refine your mesh in the contact region? It all depends on your model.

But if you have set this up exactly like the tutorial and you're seeing that much of visual penetration, then there might be something odd going on. Can you open the model I attach and check this?

Kind Regards,
Paulo Libório.

Ali_22006

Paulo Libório said:

Ali,

I wouldn't say "not correct". Although, there's one setting in the PCONT property that might help with contact penetration. GPAD → THICK

And then, you can check Contact Deformation SPOS / Normal (Penetration) output to check actual values for penetration.

Visually, there's no penetration. But I can see from the contour that there's some. Is it acceptable? Should you refine your mesh in the contact region? It all depends on your model.

But if you have set this up exactly like the tutorial and you're seeing that much of visual penetration, then there might be something odd going on. Can you open the model I attach and check this?

Kind Regards,
Paulo Libório.

Thanks but I can't find the attached model, Can you please resend

Paulo Libório

Done model

Ali_22006

I don't think this is the correct approach, 

My understanding of GPAD was to take account of shell thickness if the thickness occupies space in the gap. Since I configured the surfaces elements to represent the outer shell and the thickness was directed away from the gap, I didn't think it would cause such an issue.

Ali_22006

Hi Paulo, 
We try turning on GPAD and it still doesn't solve the issue, Is there any other place where I can look?

Jason_Craanen

Ali_22006 said:

Hi Paulo,
In your opinion the connection setup in this tutorial: https://2023.help.altair.com/2023/hwsolvers/os/topics/solvers/os/rubber_ring_hwx_tutorial_r.htm#reference_mtw_vt2_nwb, Isn't correct? Because I used this tutorial and found the same intersection? 

Can you please share the fem and h3d from your setup for this tutorial?

Jason_Craanen

Hello,

For your particular question referring to the Ring tutorial, yes GPAD=THICK will solve your issue.