Pressing force for fitment analysis

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

Dear  All,

 

I want to calculate press in force required to push the bearing outer ring into the housing using pressing dolly.

I have defined contact between pressing dolly and outer ring; outer ring and housing.

Is that pressing force is contact force between pressing dolly and outer ring ??

Need your opinion for the same. (I’m using Radioss for this analysis)

 

Also, Is it possible to do above analysis at -30 degrees surrounding temperature?

Please revert with the above queries.

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    refer this image

    image.png.300e121cd88faf31e43147c42346207e.png

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited May 2018

    Hi,

    The pressing dolly can be made as rbody and reaction force at the master node would give you the press force

     

    As the press pushes the bearing into the housing, the contact between the housing and the bearing will generate two forces, i,e normal force and tangential forces . These are not the press forces but will influence the press force.

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018
    Altair Forum User said:

    Is that pressing force is contact force between pressing dolly and outer ring ??

    You have to create and put RBODY (for pressing dolly) in the output block, so to see the insertion force you can plot the force on this RBODY in a particular direction using T01 file in HyperGraph.  In a similar way for Retention force you have to see the Interface(Contact) force in HyperGraph.  Plot Normal Force (NF).

     

    Altair Forum User said:

    Also, Is it possible to do above analysis at -30 degrees surrounding temperature?

    I don't think this is possible in RADIOSS. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hi,
    I think that you can perform analysis at -30C but it is necessary to have material card correlated to the -30C.
    There is no heat transfer between components and surrounding, but material card for -30C is slightly different that material for RT and it will give you different results.

    Please correct me if I am wrong.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Can you revert with the procedure for requesting RBody in output block?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hello,

    From Analysis page choose output blocks and select elems from the selection menu and select the rigid body elements, click create and click edit. 

    Keep NUM_VARIABLES as 1 and under Var option type DEF, so that all default outputs will be extracted for the rigid body.

    Check /TH/RBODY in Help for the outputs available.

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