Non-linear Analysis Model will not Converge or Produce results

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi, I have a model of a breast that should be deformed between two plates. I have tried various variations using the PCONT card, CNTSTB, and EXPERTNL with CNTSTB and I still cannot get the model to produce results. I have tried increasing the NINC card as well to not avail. The top plate will move but it is not interacting with the breast to have it spread across the bottom plate. Any help would be greatly appreciated.

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi @GA_Peach0511

     

    Thank you for sharing file.

     

    We will get back to you soon. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi,

     

    Unfortunately the analysis time is huge and it is taking time to debug. 

     

    I can suggest the following:

    1) Can you try with Slide contact alone?

    2) If you want to use PCONT, can you change stiffness to hard and check if that helps?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    I️ have tried it without the Pcont cards only using slide contact. It will run just still no convergence. Is Optistruct not able to handle the model? I’m thinking I️ may need to use another solver

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi,

     

    SOrry for a late reply. I see there is some problem with contact modelling. 

     

    I am trying to figure out that. 

     

    I will share the updated model soon. 

    <?xml version="1.0" encoding="UTF-8"?>GO.PNG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Were you able to fix the contact problem?

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