Posted by: enahs ® 10/19/2010, 10:02:52 Author Profile eMail author Edit

Hello Gentlemen I am facing a small problem where your experience and expertise can help me a lot.Please put your views on the problem shown. I hope I made the problem clear, If I have lost some information please correct me. I need to find the centrifugal force acting on the outer rod to design the diameter and number of rods accordingly. enahs

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: Centrifugal load
: Centrifugal load -- enahs	Post Reply	Top of thread	Engineering Forum

Posted by: niravpatel14 ® 10/27/2010, 23:45:39 Author Profile eMail author Edit

If the C.G. of the material (ring/blank whatever) matches with the axis of rotation then the Centrifugal force will be zero but if the centre of this material is offset then you can calculate the centrifugal force by M.r.w2 (em into r into omega square). Each rod should be capable of withstanding this centrifugal force.

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: Centrifugal load
: Centrifugal load -- enahs	Post Reply	Top of thread	Engineering Forum

Posted by: Pinkerton ® 10/24/2010, 21:17:06 Author Profile eMail author Edit

I chose not to respond after you posted this on the 19th. There was and still is too little information to formulate an approach to the methodology. However, there could be zero Centrifugal load on the rods if the yellow thing is a single cohesive mass supported in place by the inner rods. I have a question for you. How far will a rubber band stretch? Dave

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: : Centrifugal load
: : Centrifugal load -- Pinkerton	Post Reply	Top of thread	Engineering Forum

Posted by: dalecyr ® 10/26/2010, 14:04:29 Author Profile eMail author Edit

OH! OH! I know this one! Until it breaks. (laughing, ducking and running) dale

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: : : Centrifugal load
: : : Centrifugal load -- dalecyr	Post Reply	Top of thread	Engineering Forum

Posted by: Pinkerton ® 10/26/2010, 18:09:42 Author Profile eMail author Edit

Dale, Dale, Dale, you were doing so well too. ;) You need to slow down and respond to the question accurately. It will stretch until the point just before it breaks. It's a bit like the shade-tree mechanic that uses experience to torque bolts rather than using a torque wrench. He tightens it until it just strips then backs it off a touch. LOL Dave

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: : : : Centrifugal load
: : : : Centrifugal load -- Pinkerton	Post Reply	Top of thread	Engineering Forum

Posted by: dalecyr ® 10/27/2010, 12:35:39 Author Profile eMail author Edit

Ah, ya got me. Thanks for the tip on determining torque tho. ;)

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: Centrifugal load
: Centrifugal load -- enahs	Post Reply	Top of thread	Engineering Forum

Posted by: devitg ® 10/24/2010, 18:54:17 Author Profile eMail author Edit

If not , what is the material inside ?

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Centrifugal Load Calculations
: : Centrifugal load -- devitg	Post Reply	Top of thread	Engineering Forum

Posted by: Kelly Bramble ® 10/29/2010, 10:22:55 Author Profile eMail author Edit

Well, let's take a look here folks: Centrifugal Force Calculations of Rotating Body /gears/centrifugal-force-calculations.htm I think the first equation F = [Wv^2]/gR might give an estimation. Where: W = 100 tons/8 ? R = ? v = needs to be calculated g = 32.174 ft/sec^2 Modified by Kelly Bramble at Sat, Oct 30, 2010, 12:14:40

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Centrifugal Load Calculations
: Centrifugal Load Calculations -- Kelly Bramble	Post Reply	Top of thread	Engineering Forum

Posted by: Kelly Bramble ® 10/29/2010, 10:25:51 Author Profile eMail author Edit

Iwould use the second equations to estimate the Weight of the pins if your know the Centrifugal Force required. W = FRg/v^2

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