Interference Fit Simulation

karth
karth Altair Community Member
edited October 2020 in Community Q&A

A 'cylinder of diameter 12.82 mm' gets interference fitted in a 'plate with a hole diameter of 12.60 mm'. The radial interference is hence 0.11 mm.

Can this be simulated in Altair?

Which module is used for simulating it?

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    Hi,

    You can simulate interference fit in OptiStruct and RADIOSS as well.

     

    Please go through the post below which specifies about interference fit simulation in OptiStruct and a sample model file is also available in this post.

    And regarding RADIOSS solver there are two options for interference fit simulation. 

     

    First you can simulate the physical press fit process in RADIOSS.  Define contact between the two parts, constrain one part and apply an imposed displacement on the other part and simulation the physical press fit process.

     

    Second option is to use /INTER/TYPE24 contact and set INACTI=-1 which will apply forces to remove initial intersection caused by the press fit.  The one limitation with INACTI=-1 is that it applies the force all at once and for large initial penetrations the force can be too large.  To reduce the force you can use the STFAC option on /INTER/TYPE24.  In the attached model, STFAC=0.25 seems to give reasonable results.  Run the model with STFAC=1 (default) see the difference.    I ran the attached model in RADIOSS version 2017.1 but 14.0.230 or 2017.0 should also be fine.

    Unable to find an attachment - read this blog

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