Type 7 & Type 2 Contact Types in Radioss which are used in AOC 2017 Contest Models

Altair Forum User
Altair Forum User
Altair Employee
edited December 2022 in Community Q&A

Dear Team,

 

I want to know about the TYPE 7 and TYPE 2, contact types and how to apply them. 

 

These contacts have mentioned in AOC 2017 Contest Model under Radioss section.

 

Kindly provide the information & videos for its application.

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Answers

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

    Information regarding these two Contacts in Radioss for AOC 2017 Contest Models.

     

    1.       Type 7 –  ( General Purpose Interface )

     

    a.       Multi-usage impact interface, modeling contact between a master surface and a group of slave nodes.

    b.       General purpose interface and can simulate all types of impact between a set of nodes and a master surface.

     

    2.       Type 2 – ( Tied Interface )

     

    a.       Tied Contacts define an interface that kinematically connects a set of slave nodes to a master surface.

    b.        This interface is used mainly for the connections.

    c.        It can be used to connect coarse and fine meshes, model spot-welds, rivets, etc

     

     

    For AOC 2017 Radioss Model - 

    1.       Type 7 interface is between “ Seat Frame & Ram”

    2.       Type 2 interface is between “Foam & Seat Frame”

     

    In order to know their application, refer below provided link for AOC 2017 Training & refer Day 14,15,16 for Radioss –

     


     

  • Simon_21768
    Simon_21768 Altair Community Member
    edited December 2022
    Altair Forum User said:

    Information regarding these two Contacts in Radioss for AOC 2017 Contest Models.

     

    1.       Type 7 –  ( General Purpose Interface )

     

    a.       Multi-usage impact interface, modeling contact between a master surface and a group of slave nodes.

    b.       General purpose interface and can simulate all types of impact between a set of nodes and a master surface.

     

    2.       Type 2 – ( Tied Interface )

     

    a.       Tied Contacts define an interface that kinematically connects a set of slave nodes to a master surface.

    b.        This interface is used mainly for the connections.

    c.        It can be used to connect coarse and fine meshes, model spot-welds, rivets, etc

     

     

    For AOC 2017 Radioss Model - 

    1.       Type 7 interface is between “ Seat Frame & Ram”

    2.       Type 2 interface is between “Foam & Seat Frame”

     

    In order to know their application, refer below provided link for AOC 2017 Training & refer Day 14,15,16 for Radioss –

     


     

    Does it matter, which surface is chosen as master and which as slave?

  • PaulAltair
    PaulAltair
    Altair Employee
    edited December 2022
    Simon_21768 said:

    Does it matter, which surface is chosen as master and which as slave?

    For TYPE 7:

    If a simple node to surface contact it is recommended to define the coarser mesh as main and the finer mesh as secondary (we no longer use 'master/slave' terminology)

    People often generate a 2nd 'symmetric' contact with m+s reversed for best results

    For a 'general contact' i.e. everything contacts everything else, including itself, then the main and secondary entities are the same (albeit elements/surf on main side and nodes on secondary) so the question doesn't arise really

    For TYPE 2: (tied contact)

    Main coarser, secondary finer, typically...

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