How to deactivate contact between load steps

Natalia Reynoso
Natalia Reynoso Altair Community Member
edited February 2023 in Community Q&A

Hello, 

 

I am doing a thermal analysis, and I would like to deactivate a contact between load steps. How can I do that?

Thanks, 

 

Natalia Reynoso 

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Answers

  • Ben Buchanan
    Ben Buchanan
    Altair Employee
    edited January 2023

    You can use the MODCHG card to deactivate contacts for a certain load case.
    https://2022.help.altair.com/2022.1/hwsolvers/os/topics/solvers/os/modchg_sub_r.htm

  • Natalia Reynoso
    Natalia Reynoso Altair Community Member
    edited January 2023

    Hi Ben, 

    Thanks for your reply. I also thought that MODCHG card would help me, but unfortunately MODCHG is not supported for a non-linear transient heat transfer subcase nor for transient heat transfer. Do you have any other idea?

    Thank you very much. 

  • Ben Buchanan
    Ben Buchanan
    Altair Employee
    edited January 2023
    Natalia Reynoso said:

    Hi Ben, 

    Thanks for your reply. I also thought that MODCHG card would help me, but unfortunately MODCHG is not supported for a non-linear transient heat transfer subcase nor for transient heat transfer. Do you have any other idea?

    Thank you very much. 

    Unfortunately I can't think of another good way to do this.

  • Nagarjun Sura
    Nagarjun Sura New Altair Community Member
    edited February 2023

    Create two element sets one with  with contact nodes and other without contact nodes .

    Its like not applying globally.

    For creating two elements sets use local coordinate system.

     

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