Friction-less / Friction contacts in Ansys

Click For Summary
SUMMARY

The discussion focuses on the behavior of friction and frictionless contact types in Ansys, specifically regarding their impact on motion in the perpendicular direction. Users noted that while frictionless contacts do not prevent interference between bodies, adjusting analysis settings and time steps can lead to realistic interactions. Key factors influencing this behavior include the pinball region radius, which affects contact detection. Utilizing options like "automatic bisection" and "predict for impact" can enhance contact element performance.

PREREQUISITES
  • Understanding of Ansys contact types, specifically friction and frictionless contacts.
  • Familiarity with analysis settings and time step adjustments in Ansys simulations.
  • Knowledge of the pinball region radius concept in contact mechanics.
  • Experience with contact element options, including "automatic bisection" and "predict for impact."
NEXT STEPS
  • Research the impact of pinball region radius on contact detection in Ansys simulations.
  • Learn how to effectively adjust analysis settings and time steps in Ansys for improved simulation accuracy.
  • Explore the use of "automatic bisection" and "predict for impact" options in Ansys contact elements.
  • Investigate advanced contact modeling techniques in Ansys for complex interactions.
USEFUL FOR

Engineers, simulation analysts, and researchers working with Ansys who are looking to optimize contact interactions in their simulations.

Mohamed_Wael
Messages
19
Reaction score
0
As far as I know both the friction or the frictionless contact types in Ansys doesn't prevent motion in the perpendicular direction. I have been following this tutorial https://goo.gl/w8sIlG (no need to open) but I have found something strange when I do the same but without changing the analysis settings and changing the time steps the 2 bodies interfere with each other -just I expected from frictionless contact type- but when I change the analysis settings time step they doesn't interfere https://goo.gl/0xSw4c (6 sec video) and they behave like what happens in real life. I don't understand why this happens?
 
Engineering news on Phys.org
Contact conditions are complicated, one thing to keep an eye on is the pinball region radius. If your sub-steps move a part farther than the size of the contact region's pinball radius, it will never detect contact and the parts will pass right through each other. Some ways to help with this are the "automatic bisection" and "predict for impact" options in a contact element's options.
 
Last edited:
  • Like
Likes   Reactions: Mohamed_Wael
Thanks , this was very helpful :D
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
7K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
6K
  • · Replies 6 ·
Replies
6
Views
17K
Replies
2
Views
5K
  • · Replies 1 ·
Replies
1
Views
10K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
4K
Replies
3
Views
3K
  • · Replies 8 ·
Replies
8
Views
50K