The basic technique is to model the initial interference so that the two bodies overlap and then use a contact surface for the two surfaces that will eventually be coincident. You will need a load to make an analysis valid, so if there are no other loads, use a dummy zero Global temperature load.
Best regards,
Matthew Ian Loew "Luck is the residue of design."
Branch Rickey
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I've put in an enhancement request to be able to do this in integrated mode. When I checked today it's status was listed as "Pending". I don't know what that means unfortunately. Maybe in Wildfire 4
An easier method to be used in Integrated mode is this;
If you know the interference (displacement) of the press fit then you can work backwards by placing a pressure load on the female section until the interference displaecement is reached. This value of pressure can be assumed to be the press fit pressure.
i am also stuck with interference fit contact analysis. And i liked the method that you have mentioned. but can you explain me with an example. please. i am desperate to know. thanks
Sari
Performing closed form calculations is always a good idea. However, it will only work for geometry that has the stresses calculated from closed form equations. I have performed several press-fit calculations on irregular geometry. Using a FEM based solution was the only way to model the problem with accuracy.
Best regards,
Matthew Ian Loew
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.