2d contact hypermesh

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

hello,

i am trying to create a contact surface on a hopkinson bar model (axisymmetric) but when i export i gat this error:

 

/SURF/SEG/4
specimen_input                                                                                      
##HMERROR: A few surf segs are created on 2-nodes elems.
## They will not be exported.

i need a sur seg because i use type 3 contact

how do i solve this problem?

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    Hi Phil,

    Unfortunately neither HyperCrash or HyperMesh allow user create /SURF/SEG with 2 nodes which are needed for setting up contact for axi-symetric models.  The best work around possible is to create contact surfaces in HyperMesh using the LINE_SEG card image which then creates a /LINE/SEG set which you change to /SURF/SEG manually in the input deck.
     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    i will try that out, however i have one more question, how do make my export file automatically contain these line inside it?:

     

    #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
    #/INTER/TYPE24/2
    #eprou_input_type24                                                                                   
    #---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
    # surf_ID1  surf_ID2      Istf   
    #                   3         2

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    Hi Phil,

    These are cards for Type 24 interface and the user has to define this interface in HyperMesh or HyperCrash and export the same in order to have this card in the deck. We cannot make this card to export as default.

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