Solid shaft compression - taper locks

AI Thread Summary
The discussion focuses on determining the stress on a solid shaft subjected to compressive forces from taper locks or press fits. The original poster is uncertain about the maximum allowable hoop stress when the internal radius is zero. They question whether steel can withstand more than 250 MPa in this context, especially when a locking ring applies 220 MPa to the shaft's exterior. Despite calculations suggesting insufficient strength for a shaft with a 65 mm outer diameter and 1 mm inner diameter, the poster believes it would still function effectively. The conversation highlights the complexities of stress analysis in solid shafts under compression.
dan_68c
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Hi all,

I am trying to work out the stress on a shaft when a compressive force is placed on it such as a taper lock or press fit. I have looked at all the thin and thick wall section formulas and they seem ok. I am not sure what happens when the internal radius becomes 0 and its a solid shaft.
What is the maximum stress (hoop) allowable. For example surely steel can take more than say 250 mpa if it is a solid shaft being clamp.
What compression should a steel shaft be able to withstand,
Thanks all, too many hours scratching my head on this one.
 
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Just to make things clear i am looking at a locking ring that applies 220mpa to the outside of the shaft, and using these equations even a shaft with a with 65 mm od and 1 mm ID it isn't strong enough but i know it would work.
Thanks all
 

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