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Plate Thickness for CounterBore 1
- Thread starter sarclee
- Start date
SWComposites
Aerospace
No.
In the counterbore case the bearing contact stress is only on the shank portion of the thickness.
In the counterbore case the bearing contact stress is only on the shank portion of the thickness.
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1
- #3
Also... consider the following...
The resultant 'stress concentrations' between countersinks and counterbores are very different.
But more that than 'simple stress concentration differences'... this could be a very broad topic for technical discussion... believe-it-or-not...
Examples of 'considerations'... just to identify three factors [of many]...
*There are issues with counterbore/countersink depth, radii and hole [and hole-to-fastener shank] 'dimensions', 'alignment', 'tolerances' and 'finish quality'.
*The TYPE of fasteners [or inserts] installed are important, such as: shear-head or tension-head protruding and flush-countersunk... solid or blind... rivets or lock-bolts or screws or sleeves, etc...
*Materials [alloys/tempers] vary in their susceptibility to grain-end exposures failure-modes.
My head hurts.
Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov
The resultant 'stress concentrations' between countersinks and counterbores are very different.
But more that than 'simple stress concentration differences'... this could be a very broad topic for technical discussion... believe-it-or-not...
Examples of 'considerations'... just to identify three factors [of many]...
*There are issues with counterbore/countersink depth, radii and hole [and hole-to-fastener shank] 'dimensions', 'alignment', 'tolerances' and 'finish quality'.
*The TYPE of fasteners [or inserts] installed are important, such as: shear-head or tension-head protruding and flush-countersunk... solid or blind... rivets or lock-bolts or screws or sleeves, etc...
*Materials [alloys/tempers] vary in their susceptibility to grain-end exposures failure-modes.
My head hurts.
Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov
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