3 Replies Latest reply on Nov 8, 2011 9:43 AM by Ryan Werner

Using Global and Local Contact Sets Together

William Turk Nov 8, 2011 8:55 AM

Is there any advantage or disadvantage to running a simulation with both global and local contact sets? I frequently leave in the default global contact, and add either bonded or non-penetrating local sets where I know they are likely to come into contact. Thanks.

Re: Using Global and Local Contact Sets Together

Ryan Werner Nov 8, 2011 9:29 AM (in response to William Turk)

Hi William,

You are doing it correctly. The Global Bonded set is good to ensure that all touching faces will behave as though they are connected. Then from there you can add whatever Local sets you think are necessary or what your results show are necessary.

Ryan W.
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- Re: Using Global and Local Contact Sets Together
  
  William Turk Nov 8, 2011 9:37 AM (in response to Ryan Werner)
  
  Thanks! I was wondering, because I frequently get bogged down while star is solving contact sets.
  
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  - Re: Using Global and Local Contact Sets Together
    
    Ryan Werner Nov 8, 2011 9:43 AM (in response to William Turk)
    
    That is probably due to the No Penetration contacts. Adding those to a study will increase the solve time substantially.
    Usually just bonded contacts will solve pretty quick. One exception to this though is if you have a model where there are quite a few faces that are not actually touching and you add local bonded sets to these. This will slow things down since then Simualtion must calculate for these distances.
    
    Ryan W.
    
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