pressfit analysis with static load subcase

User: "Sid_22073"
Sid_22073
Altair Community Member
Updated by Sid_22073

Hello,

In optistruct, I want to simulate a  load by taking account of the interference fit at a sleeve location.

How to run  this into two seperate subcase?

I would like to use static case for better solving time is this ok, or I need to use NLSTAT for both cases

can you please help me with an example solver file.

image

Thanks,

Sid

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    User: "RobinsonFerrari"
    RobinsonFerrari
    Altair Employee
    Updated by RobinsonFerrari

    Hi Sid,

    Please see attached a small deck showing how to do this.

    I'm using the model in this example from here: link

    I added a new subcase continuing from the interference fit subcase.

    In this model, a negative clearance is being used to resolve penetration (which is often used to help with convergence). In subcase 2 it is necessary to use CNTNLSUB to continue from the previous subcase, which means that both subcases must be of the same type: NLSTAT SMDISP or LGDISP.

    Hope it helps you. Consider marking this answer as correct if it solves your problem, so other people may be helped too.

    Thank you very much

     

    Interference_fit_2STEPS.fem
    User: "Sid_22073"
    Sid_22073
    Altair Community Member
    OP
    Updated by Sid_22073

    Hello Robinson,

    Thanks for the answer so far.

    Sorry for late reply, I was preparing the model these days. 

    I checked your model, I see there is physical geometrical interference of 20mm, so below is the PCONT is used in your file.

    PCONT          2                0.0             -20.0   YES    

     

    But, In my model, I do not to have any physical interferece between geometries, I mean the geometries are just touching each other without penetration.

    In my case, how can I input the interference fit value ? 

    Looking forward for your answer.

    Kind regards,

    Sid

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