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  • Ashutosh says:

    Winzip is giving some error while unzipping this file-folder. Can anyone fox that?

    Thanks

  • Subramani says:

    Dear Suri,

    Is there a way to output contact stresses for *automatic_surface_to_surface_tiebreak? In other words, how to validate whether the contact fails at nfls and sfls?

    Thanks,
    Subramani

  • Suri Bala says:

    Subramani,

    You can use SPR=1 to view the contact stresses.

    Suri

  • Subramani says:

    Suri,

    Thanks. Using SPR=1, how do I view the contact stresses? Do I have to invoke any output apart from RCFORC?

    Thanks,
    Subramani

  • Suri Bala says:

    Subramani,

    Please see the LS-DYNA Keyword user manual for the parameter ‘SPR’ for more information.

    Suri

  • Subramani says:

    Suri,

    Thanks. In a two-way contact like *automatic_surface_to_surface_tiebreak, what nfls and sfls should be input? Should those values be equal to the physical strength values or twice the strength values?

    Thanks,
    Subramani

  • Rosario says:

    Dear Suri

    I am studying the peeling load case. Is it possible to run this simulation with CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TO_SURFACE_TIEBREAK option 8 instead of option3? When I try to do it, I change the value of “otpion” and “param” in CARD 4 but an error occurs (node velocity is out of range). How can I fix the problem?

    Thanks in advance
    Rosario

  • Suri Bala says:

    Rosario,

    If this contact with option 8 is used with shells, it must work as expected.
    Instability might be due to initial penetrations.

    Suri

  • Rosario says:

    Dear Suri,
    can I read the status of tiebreak contact within the intfor file? I red in a paper that this is possible by plotting in LS-PREPOST nodal contact gap in the INTFOR file, but when I tried to do it the following message appeared:
    WARNING: no contact gap data

    Thanks in advance
    Rosario

    P.S. I flagged SPR=1 in the *CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TO_SURFACE_TIEBRAK

  • Estephan says:

    Dear Suri,

    My question is about your quick notes on Automatic_Surface_To_Surface_Tiebreak contacts.

    In contact: whenever I use option 4, I do not have any problem but I have instability when I use option 6 for my solid elements contact. I tried to follow your notes to figure out where the problem is, i.e running a3 contact , penalty stifness=0.1…. but they did not help. I was wondering what else I can try. Can it be from geometry so that I can regenerate it?

    Kind regards,

    Estephan

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