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LS Dyna

LS Dyna

Topics related to LS-DYNA, Autodyn, Explicit STR and more.
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  3. Collisions in LS-DYNA

Collisions in LS-DYNA

    • October 16, 2024 at 4:20 pm
      rsousa6
      Subscriber

      I've been running simulations in LS-DYNA with buckling fibers, but I have run into an issue where the buckled fiber passes through itself.

      In the picture on the right, the structure seems to be passing through itself. I am wondering which settings I can use to reduce/eliminate this issue. Below are the keywords I have for contact:

    • October 17, 2024 at 12:26 pm
      Alex R.
      Ansys Employee

      Hello, 

      The structure self-contact should be handled by *CONTACT_AUTOMATIC_SINGLE_SURFACE. Please see if the structure part is included in that contact. Please try using this option in *CONTACT_AUTOMATIC_SINGLE_SURFACE card SOFT = 2, SBOPT =3 and DEPTH = 5. 

      https://www.dynasupport.com/tutorial/contact-modeling-in-ls-dyna/contact-types

      https://www.dynasupport.com/howtos/contact/soft-option

      Let us know how it goes, 
      Alex 

    • October 22, 2024 at 7:10 pm
      rsousa6
      Subscriber

      The structure part is included in that contact, as is everything else in the model. I also have those settings for CONTACT_AUTOMATIC_SINGLE_SURFACE already set, so those don't seem to be the issue. I'm thinking maybe I should run the simulation with a lower impactor velocity?

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