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Old 02-23-2017, 01:14 PM
Allen Burgess Allen Burgess is offline
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Join Date: Sep 2011
Posts: 2,147
Sheer to push pull force

This guy measures his Sheer to Push Pull force amplification at 3.33 times as much:


https://www.youtube.com/watch?v=hvLjgZWl4s8


Comment from the video:


Ima MagnetFanatic2,

"It is very easy to empirically observe that the Shear Force is less than the Pull Force in many situations. If you go to KJmagnetics and look up item BX0X0X0-N52 you will find a 1" cube magnet with a 94.6 lb pull force. If you click on the Pull Force Case 3 link you will see a log graph of the pull force curve. The maximum Shear Force required to shear the magnets will be right about 28.5 lbs. It is true that this corresponds to a distance of about 0.33 inches and this may lead someone to mistakenly believe that the total shear force is equal to the total pull force as you have to shear the magnet for 1 inch. However, the shear force is not a constant 28.5 lbs. Initially the shear force is less and it gradually builds up to the 28.5 lbs and then after 1" it precipitously drops to nothing. So just as the pull force is not a straight line, neither is the Shear Force. Furthermore, EVEN IF the Shear Force was a constant 28.5 lbs for the full inch then it is still easy to prove that there is excess energy in the Pull Force. The Pull Force chart only goes to 1 inch but there is STILL 7.5 lbs of Pull Force at 1 inch and there is still a significant amount of force after that which could be captured and utilized. In no way in two of these magnets could it be argued that the overall Shear Force is equal to the overall Pull Force. You don't even need a Push Pull meter to empirically observe this".
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Last edited by Allen Burgess; 02-23-2017 at 01:22 PM.
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