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How to estimate clamp loads for joints under cyclic loading

How to estimate clamp loads for joints under cyclic loading

How to estimate clamp loads for joints under cyclic loading

(OP)
we are trying to do a small test study on one of the crank shafts bolts. we know that the operating condistions of the shaft produces a clyclic load of 5000 lbs on the joint.
how much (any rule of thumb?) preload should I use inorder the joint dosent come loose after a test.

anything over 5000 lbs should work? or any formula?

I know the more the better , but whats the minimum preload should I get in the joint to sustain a cyclic load of 5000 LBS.

Thnaks

RE: How to estimate clamp loads for joints under cyclic loading

Since this is a crankshaft application, I would think that it is likely that you would consider it to be a critical joint.  
With that in mind you really need to have someone who understands bolted joint design take a look at this joint. It is much more complex than just saying that anything over 5,000 will work.  There is a high likelyhood that that approach will lead to field failures.  Don't mess with critical joints unless you really know what you are doing.

RE: How to estimate clamp loads for joints under cyclic loading

(OP)
Thanks Desertfox and Screwman

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