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Results don't converge

User: "Matt.B"
Matt.B
Altair Community Member
Updated by Matt.B

Hello, 

 

For a non-linear calculation with contacts and friction, it does not converge. (see picture warning). Despite a high refinement and a high number of passes, this does nothing.

Can you help me please?

Thanks in advance.

MBimageimage

Community-Pasted-Attachment-1655803663345.png

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SimSolid
v2022
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    User: "Gouthami Polina_22137"
    Gouthami Polina_22137
    Altair Employee
    Updated by Gouthami Polina_22137

    Hi Mathis,

    what are your contact types? If you are using a separating/closing contact, SimSolid requires a initial contact, something like a hertz contact to achieve convergence.

    Please share your model. We can take a look.

    Thanks,

    Gouthami

     

    User: "Matt.B"
    Matt.B
    Altair Community Member
    OP
    Updated by Matt.B

    Hi Mathis,

    what are your contact types? If you are using a separating/closing contact, SimSolid requires a initial contact, something like a hertz contact to achieve convergence.

    Please share your model. We can take a look.

    Thanks,

    Gouthami

     

    Hi, 

     

    Attached the model.

     

    I'm using separating closing contacts. But, yes some areas have no initial contact. 

     

    Moreover, I am assuming small deformations, perhaps we should go to large deformations ? It will no longer be possible to use non-linear contacts. 

     

    Thanks

     

    Mathis 

    ALTAIR COMMUNITY.zip
    User: "M. Jenaban"
    M. Jenaban
    Altair Community Member
    Updated by M. Jenaban

    Hi Matt, 

     

    I am having the same issue, has this been resolved yet? I am keen to know why SimSolid 2022 results never converge with separating contacts doesn't matter how much you refine your connections and solver.

    User: "Matt.B"
    Matt.B
    Altair Community Member
    OP
    Updated by Matt.B

    Hi Matt, 

     

    I am having the same issue, has this been resolved yet? I am keen to know why SimSolid 2022 results never converge with separating contacts doesn't matter how much you refine your connections and solver.

    Hi, 

     

    The issue has not been resolved.

    No initial contact on some areas + hypothesis of small deformations seem to be fatal for the convergence. 

    Good Luck 

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