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Barbed press fits, allowable stress vs required

Barbed press fits, allowable stress vs required

Barbed press fits, allowable stress vs required

I've been trying to calculate material stresses and retention forces of a metal barbed fitting pressed into a plastic body. I need the barb size and engagement strong enough to hold an internal air pressure but not have such a large overlap that pressing the fittings compromises the material during assembly.

I found the attached GE Plastic Design Guide which I've been referencing but all calculations shown are for interference fits of shafts in bores. They mention that using a barb shape can help improve retention but then fail to address how to design the barb interface.

Does anyone have a good reference they could share that goes into more detail?
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