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[tut06916]

Hi Everyone

I created a dome composed of many beams as shown in the figure 1 and 2, and made a cylinder imapct it. I applied *CONTACT_AUTOMATIC_BEAMS_TO_SURFACE_ID between the cylinder and each beam. As for beams, there is a little difference in height between 2 beams. I didn't add any contacts. I added *CONSTRAINED_GENERALIZED_WELD_SPOT or *CONSTRAINED_SPOTWELD between the nodes of 2 beams closest to the intersection. After I ran the simulation, the cylinder went through the dome rather than impacting it, as shown in figure 3. The beams appeared to have a little oscillation. It seems that there is still some interaction force between the beam and the cylinder. But the cylinder just directly went through the beams. Does anybody know the reason and how to fix it? 

I attached my .k file : https://tuprd-my.sharepoint.com/:u:/g/personal/tut06916_temple_edu/IQAtEDBPZhKLRYw4Kr0EEa_AAeYXal-n6FkEF1ROSpG_67k?e=86nLOW

[ErKo]

 

 

Hi

Ansys employees are not allowed to download files. Please wait for other forum members to chime in and perhaps help (D. Chen and peteroznewman).

All the best

Erko

 

 

[tut06916]

Hi ErKo, do you have any suggestions just based on my description?

[Dennis Chen]

Hello tut06916, I did not download your file to try to solve it directly but I made a quick video on this topic.   The link is here -

.   Maybe it can help you.

A quick summary is you can use automatic_nodes_to_surface contact with depth = 5 to do general solid surface segment to beam nodes contact.   This works except in the case where the solid edge is also in contact with the beam at an angle.   In that case, mortar contact seems to work best but it is far more expensive computationally. 

for beam to beam contact (which I suspect you will need), you can use automatic_general contact.  _general contact is a type of single surface contact that allows good behavior for shell edge to shell edge or beam to beam contact.    

I hope this helps you

Thanks 

[tut06916]

Thank you, Chen. I will have a try.

[ErKo]

 

THat is very good D CHen , nice example and explanation – that is what we have dicussed also previously. Hope all this helps (tut06)

All the best

Erko